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WO2015178534A1 - Apparatus for improving image quality, digital photography apparatus having same, and method for improving image quality - Google Patents

Apparatus for improving image quality, digital photography apparatus having same, and method for improving image quality Download PDF

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Publication number
WO2015178534A1
WO2015178534A1 PCT/KR2014/006631 KR2014006631W WO2015178534A1 WO 2015178534 A1 WO2015178534 A1 WO 2015178534A1 KR 2014006631 W KR2014006631 W KR 2014006631W WO 2015178534 A1 WO2015178534 A1 WO 2015178534A1
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WO
WIPO (PCT)
Prior art keywords
image
light
area
image sensor
zrf
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Ceased
Application number
PCT/KR2014/006631
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French (fr)
Korean (ko)
Inventor
์ตœํ•™๋ฆผ
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Msys Inc
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Msys Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise

Definitions

  • the present invention relates to an image quality improving apparatus, a digital photographing apparatus having the same, and a method for improving image quality, and more particularly, an image having excellent sharpness and color reproducibility even when there is an excessive brightness difference due to light saturation or lack of light in each region within a screen.
  • the present invention relates to a device for improving image quality, a digital photographing device having the same, and a method for improving image quality.
  • a digital camera projects an image onto an image sensor, which is a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), not a film, and captures a photo on a digital storage medium such as a memory card. Record it.
  • CCD Charge Coupled Device
  • CMOS Complementary Metal Oxide Semiconductor
  • Such a digital camera provides an auto white balance (AWB) function to the entire screen when there is a light saturation due to excessive brightness of light or vice versa due to excessive brightness of the light on the image sensor. We are trying to improve it. At this time, the saturation or lack of light in each area causes problems in the sharpness and color reproduction of the screen.
  • AOB auto white balance
  • the digital camera when a difference occurs between the visible light region and the sensor sensitivity region, the digital camera operates as a noise of light outside the actual visible region in one entire screen.
  • the band By adjusting the band appropriately to adjust the brightness of the light to increase the sharpness of the screen, and to distribute the color to take a picture or record a video.
  • the present invention is a ZRF (Zone collected Reduction Filter) installed between the lens unit and the image sensor when there is an excessive brightness difference due to light saturation or lack of light in each area in one screen
  • ZRF Zero collected Reduction Filter
  • Zone collected Reduction Filter having an LCD (Liquid Crystal Display) in which light transmittance is adjusted for each area divided into a plurality of regions by driving an active array and driving a unit cell;
  • An image processor which processes an image acquired by the image sensor as data;
  • a ZRF controller configured to calculate brightness of a plurality of divided regions of the image from the data processed by the image processor, and to control light transmittance of the region of the LCD to reduce the brightness difference between the regions in the image.
  • the ZRF may be installed to be biased toward the image sensor between the IR cut filter installed between the lens unit and the image sensor and the image sensor.
  • the ZRF includes glass attached to both sides of the LCD, and first and second polarizing plates for polarizing light in a direction orthogonal to each other on the exposed surfaces of the glass, respectively, and are normally white.
  • the ZRF controller is configured to minimize the control of the light transmittance of the area of the LCD when the brightness difference of a plurality of areas divided in the image from the data processed by the image processor is within a normal range, It is possible to avoid performing control of the transmittance.
  • the LCD may have an area corresponding to a plurality of pixels as one unit in the image sensor.
  • polarization regions may be uniformly or unevenly discontinuously formed in one direction, and a plurality of discontinuous arrangements of the polarization regions may be formed side by side.
  • the first and second polarizers may be formed of a wire grid polarizer.
  • the first and second polarizing plates are formed on the substrate of the light transmissive material so that the uneven parts made of a light-transmissive dielectric material or polymer are patterned in the uneven shape in one direction and side by side, and are inclined in the same direction for each inside of the grooves of the uneven parts.
  • White metal can be deposited.
  • the lens unit is incident light; An image sensor installed at the rear of the lens unit; A main control unit controlling the image acquired by the image sensor to be stored in a memory unit; And an image quality improvement unit installed to control the light transmittance irradiated to the image sensor so as to reduce the brightness difference between the regions in the image acquired by the image sensor.
  • the image quality improvement unit may further improve image quality according to an aspect of the present invention.
  • a digital photographing apparatus which is an apparatus, is provided.
  • the digital photographing apparatus may be any one of a portable digital camera, a CCTV camera, a camera of a portable electronic device, a web camera, a camera module of a vision inspector, and a camera module of a black box.
  • ZRF Zone collected Reduction Filter
  • the adjusting of the light transmittance may include extracting a light defective area as an area deviating from a predetermined brightness difference from the overall brightness among the areas of the image, and correcting it as an area contributing to the formation of the light defective area from the area of the image sensor.
  • An area may be extracted, and an area for transmitting light irradiated to the correction area among the areas of the LCD may be extracted as an adjustment area, and the light transmittance of the adjustment area may be adjusted in inverse proportion to the brightness of the light defective area.
  • the image quality improving apparatus when there is an excessive brightness difference due to light saturation or light deficiency for each region in one screen, a ZRF ( By adjusting the light transmittance for each part by Zone collected Reduction Filter, it is possible to obtain an image with excellent clarity and color reproducibility, and to reduce the resolution reduction effect of the digital photographing apparatus according to the screen brightness difference.
  • a ZRF By adjusting the light transmittance for each part by Zone collected Reduction Filter, it is possible to obtain an image with excellent clarity and color reproducibility, and to reduce the resolution reduction effect of the digital photographing apparatus according to the screen brightness difference.
  • FIG. 1 is a block diagram showing a digital photographing apparatus according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view illustrating ZRF in a digital photographing apparatus according to an embodiment of the present invention.
  • FIG. 4 is a plan view illustrating a second polarizing plate in a digital photographing apparatus according to an embodiment of the present invention.
  • FIG. 5 is a plan view illustrating another example of the first flat plate in the digital photographing apparatus according to the exemplary embodiment.
  • FIG. 6 is a plan view illustrating another example of the second flat plate in the digital photographing apparatus according to the exemplary embodiment of the present invention.
  • FIGS. 5 and 6 are cross-sectional views of FIGS. 5 and 6.
  • FIG 8 and 9 are conceptual views for explaining the operation of the image quality improving apparatus according to an embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a method of improving image quality according to an embodiment of the present invention.
  • FIG. 1 is a block diagram showing a digital photographing apparatus according to an embodiment of the present invention.
  • the lens unit 210 collects light to form an image on the image sensor 120.
  • the lens unit 210 may include a single lens or a plurality of lenses.
  • the image sensor 220 is installed at the rear of the lens unit 210 and may be formed of a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and an image focused on a chip surface is charged on an individual element. Accumulated in packets, these packets are output and converted into video for display. Meanwhile, an IR cut filter 230 may be installed at the front of the image sensor 220 to be positioned behind the lens unit 210.
  • the IR cut filter 230 is a filter for blocking the infrared rays to improve the color sensor because the image sensor recognizes not only visible light but also infrared light, and reacts with light.
  • the main controller 240 controls the image acquired by the image sensor 220 to be stored as data in the memory unit 250 according to an operation signal or a predetermined process by the operation unit, and outputs the data to the outside through the display unit as necessary. Can be controlled.
  • the image quality improvement unit is installed to control the light transmittance irradiated to the image sensor 220 to reduce the brightness difference between the regions in the image obtained by the image sensor 220, which is an image quality improving apparatus according to an embodiment of the present invention ( 100). Therefore, the image quality improvement unit will be described instead with the image quality improvement apparatus 100 according to an embodiment of the present invention.
  • the image quality improving apparatus 100 may include a zone collected reduction filter (ZRF), an image processor 120, and a ZRF controller 130.
  • ZRF zone collected reduction filter
  • the ZRF 110 is installed between the lens unit 210 and the image sensor 220, transmits the light passing through the lens unit 210 to the image sensor 220, and is configured in a pixel manner.
  • an LCD (Liquid Crystal Display) 111 (shown in FIG. 2) has an active array and an optical transmittance is adjusted for each area divided into a plurality of regions by unit cell driving.
  • the LCD 111 is composed of a plurality of pixels whose transmittance is adjusted.
  • the active array is controlled by the ZRF control unit 130, and may be a power supply circuit for supplying the power required for driving to each of the unit cells consisting of a single or multiple pixels, the size of the voltage for each of the unit cells, The application time is adjusted. Therefore, the LCD 111 may adjust the light transmittance of the pixel by the magnitude of the voltage applied by the ZRF controller 130, the application time of the voltage, and the like.
  • a region may be one unit in which light transmittance is adjusted by the ZRF controller 130, may be formed of one or a plurality of pixels, and a partition may be set by the ZRF controller 130.
  • the ZRF 110 moves toward the image sensor 220 between the IR cut filter 230 and the image sensor 220. Can be installed to strike.
  • each area of the LCD 111 may be configured to correspond to a plurality of pixels in the image sensor 220, which is just one example and may be configured to correspond to a single pixel in the image sensor 220.
  • each of the first and second flat plate plates 114 and 115 may be polarized in the X-axis and Y-axis directions, for example, but is not limited thereto. For example, it may have a polarization degree of 0.8 โ‡ 0.96.
  • the first and second polarizing plates 114 and 115 may be, for example, discontinuously formed in the polarization regions 114a and 115a, that is, regions in which light is polarized, in an equal width or length in one direction, and the polarization regions 114a and 115a. Discontinuous arrays of can be formed in plural alongside.
  • the first and second polarizing plates 114 and 115 may have uneven width or length in one direction, as well as a single polarization area as a whole.
  • the patterning of the uneven parts 116a and 117a may be formed using a unit process for manufacturing a semiconductor, such as a photo process or an etching process.
  • a plurality of rows of concave-convex shapes consisting of grooves and protrusions corresponding to the concave-convex portions 116a and 117a are formed in plural to correspond to the concave-convex portions 116a and 117a as in this embodiment, or as another example. It may be formed in a single side to be formed side by side so that a plurality of uneven parts 116a, 117a in the width direction.
  • the image processor 120 may process the image acquired by the image sensor 220 as data for calculating brightness for each of a plurality of divided regions, and output the data to the ZRF controller 130.
  • the ZRF controller 130 calculates the brightness of a plurality of divided regions of the image from the data processed by the image processor 120, and adjusts the light transmittance of the region of the LCD 111 to reduce the brightness difference between the regions in the image. To control.
  • the ZRF 110 is configured to be normally white, so that when no voltage is applied, light may be transmitted to have maximum luminance.
  • the ZRF controller 130 may be configured such that the brightness difference of the area divided into a plurality of regions by arbitrary setting from the data processed by the image processor 120 may be reduced to a normal range, for example, deterioration in image quality.
  • the control of the light transmittance of the area of the LCD 111 may be minimized, or the control of the light transmittance may not be performed.
  • the minimum step may refer to a step of minimizing the change in the light transmittance when the light transmittance of the area of the LCD 111 is set to a plurality of steps. In this case, the brightness difference between the areas in the image may be generated. The area of the LCD 111 corresponding to the area may be performed.
  • the ZRF controller 130 extracts a light defective area from a region of an image acquired by the image sensor 220 and deviates from a predetermined brightness difference compared to the overall brightness.
  • the correction region is extracted as a region contributing to the formation of the light
  • the region which transmits the light irradiated to the correction region is extracted as the adjustment region
  • the light transmittance of the adjustment region is inversely proportional to the brightness of the light defective region.
  • the overall brightness is the brightness of the whole image by the grade or numerical value
  • the brightness degree of each image area is determined by the grade or the numerical value and averaged, or other methods of calculating and determining the brightness difference.
  • the predetermined brightness difference may mean that an allowable range of the brightness difference between some or all areas and any one area is represented by a grade or a numerical value.
  • the ZRF controller 130 may include light corresponding to light saturation in an area of an image acquired by the image sensor 220, for example, an area that is excessively brighter than the overall brightness due to a subject emitting strong light. Defect area is extracted, and the correction area 222 is extracted as an area contributing to the formation of the light defective area from the areas 221 and 222 of the image sensor 220, and the correction area is selected from the areas 111a and 111b of the LCD 111. An area through which light irradiated at 222 is transmitted may be extracted as the adjustment area 111b, and the light transmittance of the adjustment area 111b may be adjusted to be lowered at a ratio set according to the brightness of the light defective area.
  • the light defective area, the correction area 222, and the adjustment area 111b may be composed of a single area or a plurality of areas among the areas partitioned by the setting in the corresponding object.
  • the ZRF controller 130 may have a light deficiency corresponding to a light shortage as an area that is excessively dark compared to the overall brightness due to a dark subject caused by backlight, for example, in an area of an image acquired by the image sensor 220.
  • the region is extracted, and the correction region 222 is extracted as an area contributing to the formation of the light defective region among the regions 221 and 222 of the image sensor 220, and the correction region (from the regions 111a and 111b of the LCD 111).
  • the area for transmitting the light irradiated to 222 may be extracted as the adjustment area 111b, and the light transmittance of the adjustment area 111b may be adjusted to be set at a ratio set according to the brightness of the light defective area.
  • the image quality improving method according to an embodiment of the present invention is a method using the image quality improving apparatus 100 according to an embodiment of the present invention, and the ZRF 110 and the image processing unit 120 of the image quality improving apparatus 100 described above. Since the configuration of the ZRF control unit 130 and the like and the embodiments thereof are applied in the same manner, a description of these configurations will be omitted.
  • an image is acquired from an image sensor 220 in which light is irradiated through the lens unit 210 and a zone collected reduction filter (ZRF) 110. (S11). Then, the image acquired by the image sensor 220 is processed by the image processor 120 as data (S12).
  • the ZRF controller 130 calculates the brightness of a plurality of divided regions of the image from the data processed by the image processor 120 (S13). When the CFR controller 130 calculates the brightness for each region of the image, the CFR controller 130 controls the light transmittance for a plurality of regions divided by the LCD 111 of the ZRF 110 to reduce the brightness difference between the regions in the image (S14).
  • step S14 the light transmittance is adjusted by the ZRF controller 130 to extract a light defective area from the area of the image acquired by the image sensor 220 as an area deviating from a predetermined brightness difference compared to the overall brightness.
  • the correction region is extracted from the region of the sensor 220 as a region contributing to the formation of the light defective region, and the region transmitting the light irradiated to the correction region from the region of the LCD 111 is extracted as the adjusting region.
  • the light transmittance can be adjusted in inverse proportion to the brightness of the light defective area. A detailed description thereof has been given above with reference to FIGS. 8 and 9.
  • the image can be obtained again by the image sensor 220, before the light transmittance is corrected by the LCD 111 in advance, even in situations such as light saturation or light shortage At the same time, it is possible to obtain images with excellent color reproduction.
  • the digital photographing apparatus having the same, and the image quality improving method according to the present invention, if there is an excessive brightness difference due to light saturation or light deficiency for each region in one screen, it is installed between the camera lens and the image sensor.
  • ZRF Zero collected Reduction Filter
  • the light is installed between the lens unit and the image sensor and transmits the light passing through the lens unit to irradiate the image sensor, is configured in a pixel manner, the unit cell by placing an active array (active array) Zone collected Reduction Filter (ZRF) having an LCD (Liquid Crystal Display) in which light transmittance is adjusted for each area partitioned by driving;
  • An image processor which processes an image acquired by the image sensor as data;
  • a ZRF controller configured to calculate brightness of a plurality of divided regions of the image from the data processed by the image processor, and to control light transmittance of the region of the LCD to reduce the brightness difference between the regions in the image.
  • An image quality improving device is provided.
  • the ZRF may be installed to be biased toward the image sensor between the IR cut filter installed between the lens unit and the image sensor and the image sensor.
  • the ZRF includes glass attached to both sides of the LCD, and first and second polarizing plates for polarizing light in a direction orthogonal to each other on the exposed surfaces of the glass, respectively, and are normally white.
  • the ZRF controller is configured to minimize the control of the light transmittance of the area of the LCD when the brightness difference of a plurality of areas divided in the image from the data processed by the image processor is within a normal range, It is possible to avoid performing control of the transmittance.
  • the LCD may have an area corresponding to a plurality of pixels as one unit in the image sensor.
  • polarization regions may be uniformly or unevenly discontinuously formed in one direction, and a plurality of discontinuous arrangements of the polarization regions may be formed side by side.
  • the first and second polarizers may be formed of a wire grid polarizer.
  • the first and second polarizing plates are formed on the substrate of the light transmissive material so that the uneven parts made of a light-transmissive dielectric material or polymer are patterned in the uneven shape in one direction and side by side, and are inclined in the same direction for each inside of the grooves of the uneven parts.
  • White metal can be deposited.
  • the ZRF controller extracts a light failure region as a region that deviates from a predetermined brightness difference from the overall brightness among the regions of the image, and extracts a correction region as a region that contributes to the formation of the light failure region among the regions of the image sensor. And extracting, as an adjusting region, a region that transmits light irradiated to the correction region from the area of the LCD, and adjusting the light transmittance of the adjusting region to be inversely proportional to the brightness of the light defective region.
  • the lens unit is incident light; An image sensor installed at the rear of the lens unit; A main control unit controlling the image acquired by the image sensor to be stored in a memory unit; And an image quality improvement unit installed to control the light transmittance irradiated to the image sensor so as to reduce the brightness difference between the regions in the image acquired by the image sensor.
  • the image quality improvement unit may further improve image quality according to an aspect of the present invention.
  • a digital photographing apparatus which is an apparatus, is provided.
  • the digital photographing apparatus may be any one of a portable digital camera, a CCTV camera, a camera of a portable electronic device, a web camera, a camera module of a vision inspector, and a camera module of a black box.
  • ZRF Zone collected Reduction Filter
  • the adjusting of the light transmittance may include extracting a light defective area as an area deviating from a predetermined brightness difference from the overall brightness among the areas of the image, and correcting it as an area contributing to the formation of the light defective area from the area of the image sensor.
  • An area may be extracted, and an area for transmitting light irradiated to the correction area among the areas of the LCD may be extracted as an adjustment area, and the light transmittance of the adjustment area may be adjusted in inverse proportion to the brightness of the light defective area.
  • the present invention is industrially applicable to digital photographing apparatus.
  • IR cut filter 240 main control unit

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Abstract

The present invention relates to an apparatus for improving image quality, a digital photography apparatus having same, and a method for improving image quality, the apparatus for improving image quality comprising: a zone-collected reduction filter (ZRF) which is disposed between a lens unit and an image sensor to let light which has penetrated the lens unit to penetrate and be irradiated on the image sensor, and which has a liquid crystal display (LCD) for which the light penetration rate for every multiply partitioned area is controlled; an image processing unit for processing an image acquired by the image sensor into data; and a ZRT control unit for calculating, by means of the data processed by the image processing unit, the brightness of the plurality of areas into which the image has been partitioned, and controlling the light penetration rate in the LCD areas so as to reduce the brightness differential between the areas in the image. According to the present invention, if an excessive brightness differential exists due to excessive light saturation or not enough light in each area within a single screen, then by controlling the light penetration rate for each part by means of a ZRF disposed between the lens unit and the image sensor, an image having superb sharpness and color reproduction can be acquired.

Description

ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜, ์ด๋ฅผ ๊ฐ€์ง€๋Š” ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜ ๋ฐ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•Device for improving image quality, digital photographing apparatus having same and method for improving image quality

๋ณธ ๋ฐœ๋ช…์€ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜, ์ด๋ฅผ ๊ฐ€์ง€๋Š” ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜ ๋ฐ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์— ๊ด€ํ•œ ๊ฒƒ์œผ๋กœ์„œ, ๋ณด๋‹ค ์ƒ์„ธํ•˜๊ฒŒ๋Š” ํ•˜๋‚˜์˜ ํ™”๋ฉด ๋‚ด์—์„œ ์˜์—ญ๋ณ„ ๊ด‘ํฌํ™” ๋˜๋Š” ๊ด‘๋ถ€์กฑ์œผ๋กœ ์ธํ•ด ๊ณผ๋„ํ•œ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์กด์žฌํ•˜๋”๋ผ๋„ ์„ ๋ช…๋„์™€ ์ƒ‰์žฌํ˜„์„ฑ์ด ์šฐ์ˆ˜ํ•œ ์˜์ƒ์„ ํš๋“ํ•˜๋„๋ก ํ•˜๋Š” ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜, ์ด๋ฅผ ๊ฐ€์ง€๋Š” ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜ ๋ฐ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์— ๊ด€ํ•œ ๊ฒƒ์ด๋‹ค.The present invention relates to an image quality improving apparatus, a digital photographing apparatus having the same, and a method for improving image quality, and more particularly, an image having excellent sharpness and color reproducibility even when there is an excessive brightness difference due to light saturation or lack of light in each region within a screen. The present invention relates to a device for improving image quality, a digital photographing device having the same, and a method for improving image quality.

์ผ๋ฐ˜์ ์œผ๋กœ, ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ๋Š” ํ•„๋ฆ„์ด ์•„๋‹Œ CCD(Charge Coupled Device)๋‚˜ CMOS(Complementary Metal Oxide Semiconductor)์ธ ์ด๋ฏธ์ง€ ์„ผ์„œ(image sensor)์— ์˜์ƒ์„ ํˆฌ์‚ฌํ•˜์—ฌ ์ดฌ์˜ํ•˜๋ฉฐ, ๋ฉ”๋ชจ๋ฆฌ ์นด๋“œ ๋“ฑ์˜ ๋””์ง€ํ„ธ ๋ฐฉ์‹์˜ ์ €์žฅ ๋งค์ฒด์— ์‚ฌ์ง„์„ ๊ธฐ๋กํ•œ๋‹ค.In general, a digital camera projects an image onto an image sensor, which is a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), not a film, and captures a photo on a digital storage medium such as a memory card. Record it.

์ด์™€ ๊ฐ™์€ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ๋Š” ์ด๋ฏธ์ง€์„ผ์„œ์— ๋งบ๋Š” ๋ฉด์—์„œ ๊ด‘์˜ ๊ณผ๋„ํ•œ ๋ฐ๊ธฐ๋กœ ์ธํ•œ ๊ด‘ํฌํ™” ๋˜๋Š” ๊ทธ ๋ฐ˜๋Œ€๋กœ ๊ด‘์˜ ๊ณผ๋„ํ•œ ๋ถ€์กฑ์œผ๋กœ ์ธํ•œ ๊ด‘๋ถ€์กฑ ํ˜„์ƒ์ด ์žˆ์„ ๊ฒฝ์šฐ, ์˜คํ†  ํ™”์ดํŠธ ๋ฐธ๋Ÿฐ์Šค(Auto White Balance, AWB) ๊ธฐ๋Šฅ์„ ํ™”๋ฉด ์ „์ฒด์— ๋ถ€์—ฌํ•˜์—ฌ, ์ด๋ฅผ ๊ฐœ์„ ํ•˜๋„๋ก ํ•˜๊ณ  ์žˆ๋‹ค. ์ด๋•Œ, ์˜์—ญ๋ณ„ ๊ด‘์˜ ํฌํ™”๋‚˜ ๋ถ€์กฑํ˜„์ƒ์œผ๋กœ ํ™”๋ฉด์˜ ์„ ๋ช…๋„์™€ ์ƒ‰์žฌํ˜„์„ฑ์— ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒํ•œ๋‹ค. Such a digital camera provides an auto white balance (AWB) function to the entire screen when there is a light saturation due to excessive brightness of light or vice versa due to excessive brightness of the light on the image sensor. We are trying to improve it. At this time, the saturation or lack of light in each area causes problems in the sharpness and color reproduction of the screen.

๋˜ํ•œ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ๋Š” ๊ฐ€์‹œ๊ด‘์˜์—ญ๊ณผ ์„ผ์„œ๊ฐ๋„์˜์—ญ์— ์ฐจ์ด๊ฐ€ ๋ฐœ์ƒํ•œ ๊ฒฝ์šฐ, ํ•˜๋‚˜์˜ ํ™”๋ฉด ์ „์ฒด์˜์—ญ์—์„œ ์‹ค์ œ ๊ฐ€์‹œ๊ด‘์˜์—ญ ์ด์™ธ์˜ ๊ด‘์ด ๋…ธ์ด์ฆˆ๋กœ ์ž‘์šฉํ•˜๋ฏ€๋กœ, ์ปฌ๋Ÿฌํ•„ํ„ฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์›ํ•˜๋Š” ํŒŒ์žฅ๋Œ€์—ญ์„ ํˆฌ๊ณผํ•˜๋„๋ก ํ•˜๊ณ , ์›์น˜์•Š๋Š” ํŒŒ์žฅ๋Œ€์—ญ์„ ์ ์ ˆํžˆ ์กฐ์ ˆํ•˜์—ฌ ๊ด‘์˜ ๋ฐ๊ธฐ๋ฅผ ์กฐ์ ˆํ•˜๋Š” ๋ฐฉ๋ฒ•์œผ๋กœ ํ™”๋ฉด์˜ ์„ ๋ช…๋„๋ฅผ ์ฆ๊ฐ€์‹œํ‚ค๊ณ , ์ปฌ๋Ÿฌ๋ฅผ ๋ฐฐ๋ถ„ํ•˜๋Š” ๋ฐฉ๋ฒ•์œผ๋กœ ์‚ฌ์ง„์„ ์ดฌ์˜ํ•˜๊ฑฐ๋‚˜ ๋™์˜์ƒ์„ ๊ธฐ๋กํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ๋‹ค.In addition, when a difference occurs between the visible light region and the sensor sensitivity region, the digital camera operates as a noise of light outside the actual visible region in one entire screen. By adjusting the band appropriately to adjust the brightness of the light to increase the sharpness of the screen, and to distribute the color to take a picture or record a video.

์ข…๋ž˜ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ์—์„œ ํ™”์งˆ์„ ๊ฐœ์„ ์‹œํ‚ค๊ธฐ ์œ„ํ•œ ๊ธฐ์ˆ ๋กœ๋Š” ํ•œ๊ตญ๊ณต๊ฐœ์‹ค์šฉ์‹ ์•ˆ ์ œ20-2001-0002331ํ˜ธ์˜ "๊ด‘์ฐจ๋‹จ์ธต์œผ๋กœ์„œ ์ ์ธต๋œ ์นผ๋ผํ•„ํ„ฐ๋ฅผ ๊ฐ–๋Š” ์”จ๋ชจ์Šค์ด๋ฏธ์ง€์„ผ์„œ", ํ•œ๊ตญ๊ณต๊ฐœํŠนํ—ˆ ์ œ10-2007-0078463ํ˜ธ์˜ "์ด๋ฏธ์ง€ ์„ผ์„œ ๋…ธ์ด์ฆˆ ์ €๊ฐ ์žฅ์น˜ ๋ฐ ๋ฐฉ๋ฒ•" ๋“ฑ์ด ๊ฐœ์‹œ๋œ ๋ฐ” ์žˆ๋‹ค.As a technique for improving the image quality in a conventional digital camera, "seam image sensor having a color filter laminated as a light blocking layer" of Korean Utility Model Publication No. 20-2001-0002331, "Korean Patent No. 10-2007-0078463" Image sensor noise reduction apparatus and method "and the like.

๊ทธ๋Ÿฌ๋‚˜, ์ด๋Ÿฌํ•œ ์ข…๋ž˜ ๊ธฐ์ˆ ๋“ค์€ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ๋กœ ์ดฌ์˜์‹œ, ํ•˜๋‚˜์˜ ํ™”๋ฉด ๋‚ด์—์„œ ๊ด‘ํฌํ™”๋‚˜ ๊ด‘๋ถ€์กฑ ํ˜„์ƒ์œผ๋กœ ์ธํ•ด, ๊ณผ๋„ํ•œ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์กด์žฌํ•  ๊ฒฝ์šฐ, ์ดฌ์˜ ์˜์ƒ์˜ ์„ ๋ช…๋„์™€ ์ƒ‰์žฌํ˜„์„ฑ์„ ํ™•๋ณดํ•˜๋Š”๋ฐ ํ•œ๊ณ„๋ฅผ ๊ฐ€์ง€๋Š” ๋ฌธ์ œ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ์—ˆ๋‹ค.However, these conventional technologies have a problem in that when shooting with a digital camera, if there is an excessive brightness difference due to light saturation or light shortage in one screen, the sharpness and color reproducibility of the captured image are secured.

์ƒ๊ธฐํ•œ ๋ฐ”์™€ ๊ฐ™์€ ์ข…๋ž˜ ๊ธฐ์ˆ ์˜ ๋ฌธ์ œ์ ์„ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•˜์—ฌ, ๋ณธ ๋ฐœ๋ช…์€ ํ•˜๋‚˜์˜ ํ™”๋ฉด ๋‚ด์—์„œ ์˜์—ญ๋ณ„ ๊ด‘ํฌํ™” ๋˜๋Š” ๊ด‘๋ถ€์กฑ์œผ๋กœ ์ธํ•ด ๊ณผ๋„ํ•œ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์กด์žฌํ•  ๊ฒฝ์šฐ, ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋œ ZRF(Zone collected Reduction Filter)์— ์˜ํ•ด ๋ถ€๋ถ„๋ณ„ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•จ์œผ๋กœ์จ, ์„ ๋ช…๋„์™€ ์ƒ‰์žฌํ˜„์„ฑ์ด ์šฐ์ˆ˜ํ•œ ์˜์ƒ์„ ํš๋“ํ•˜๋„๋ก ํ•˜๋Š”๋ฐ ๋ชฉ์ ์ด ์žˆ๋‹ค. ๋ณธ ๋ฐœ๋ช…์˜ ๋‹ค๋ฅธ ๋ชฉ์ ๋“ค์€ ์ดํ•˜์˜ ์‹ค์‹œ๋ก€์— ๋Œ€ํ•œ ์„ค๋ช…์„ ํ†ตํ•ด ์‰ฝ๊ฒŒ ์ดํ•ด๋  ์ˆ˜ ์žˆ์„ ๊ฒƒ์ด๋‹ค.In order to solve the problems of the prior art as described above, the present invention is a ZRF (Zone collected Reduction Filter) installed between the lens unit and the image sensor when there is an excessive brightness difference due to light saturation or lack of light in each area in one screen By adjusting the light transmittance for each part by), the purpose is to obtain an image with excellent clarity and color reproducibility. Other objects of the present invention will be readily understood through the following description of the embodiments.

์ƒ๊ธฐํ•œ ๋ฐ”์™€ ๊ฐ™์€ ๋ชฉ์ ์„ ๋‹ฌ์„ฑํ•˜๊ธฐ ์œ„ํ•ด, ๋ณธ ๋ฐœ๋ช…์˜ ์ผ์ธก๋ฉด์— ๋”ฐ๋ฅด๋ฉด, ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋˜์–ด ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›์„ ํ†ต๊ณผํ•œ ๊ด‘์„ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์กฐ์‚ฌํ•˜๋„๋ก ํˆฌ๊ณผ์‹œํ‚ค๊ณ , ํ”ฝ์…€๋ฐฉ์‹์œผ๋กœ ๊ตฌ์„ฑ๋˜๋ฉฐ, ์•กํ‹ฐ๋ธŒ ์–ด๋ ˆ์ด(active array)๋ฅผ ๋‘์–ด ๋‹จ์œ„ ์…€ ๊ตฌ๋™์— ์˜ํ•ด, ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ๋งˆ๋‹ค ๊ด‘ํˆฌ๊ณผ์œจ์ด ์กฐ์ ˆ๋˜๋Š” LCD(Liquid Crystal Display)๋ฅผ ๊ฐ€์ง€๋Š” ZRF(Zone collected Reduction Filter); ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๋Š” ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€; ๋ฐ ์ƒ๊ธฐ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ LCD์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋Š” ZRF์ œ์–ด๋ถ€;๋ฅผ ํฌํ•จํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜๊ฐ€ ์ œ๊ณต๋œ๋‹ค.In order to achieve the object as described above, according to an aspect of the present invention, is installed between the lens unit and the image sensor and transmits the light passing through the lens unit to the image sensor, and configured in a pixel manner, Zone collected Reduction Filter (ZRF) having an LCD (Liquid Crystal Display) in which light transmittance is adjusted for each area divided into a plurality of regions by driving an active array and driving a unit cell; An image processor which processes an image acquired by the image sensor as data; And a ZRF controller configured to calculate brightness of a plurality of divided regions of the image from the data processed by the image processor, and to control light transmittance of the region of the LCD to reduce the brightness difference between the regions in the image. An image quality improving device is provided.

์ƒ๊ธฐ ZRF๋Š”, ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋˜๋Š” IR ์ปท ํ•„ํ„ฐ์™€ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์—์„œ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์ธก์œผ๋กœ ์น˜์šฐ์น˜๋„๋ก ์„ค์น˜๋  ์ˆ˜ ์žˆ๋‹ค.The ZRF may be installed to be biased toward the image sensor between the IR cut filter installed between the lens unit and the image sensor and the image sensor.

์ƒ๊ธฐ ZRF๋Š”, ์ƒ๊ธฐ LCD์˜ ์–‘์ธก๋ฉด์— ๊ธ€๋ž˜์Šค๊ฐ€ ๊ฐ๊ฐ ๋ถ€์ฐฉ๋˜๊ณ , ์ƒ๊ธฐ ๊ธ€๋ž˜์Šค ๊ฐ๊ฐ์˜ ๋…ธ์ถœ๋ฉด์— ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๊ด‘์„ ๊ฐ๊ฐ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์ด ๋ถ€์ฐฉ๋˜๋ฉฐ, ๋…ธ๋ฉ€๋ฆฌ ํ™”์ดํŠธ(nomally white)๋กœ ๊ตฌ์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ZRF์ œ์–ด๋ถ€๋Š”, ์ƒ๊ธฐ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์ •์ƒ ๋ฒ”์œ„ ๋‚ด์ธ ๊ฒฝ์šฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ตœ์†Œ ๋‹จ๊ณ„๋กœ ํ•˜๊ฑฐ๋‚˜, ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ˆ˜ํ–‰ํ•˜์ง€ ์•Š๋„๋ก ํ•  ์ˆ˜ ์žˆ๋‹ค.The ZRF includes glass attached to both sides of the LCD, and first and second polarizing plates for polarizing light in a direction orthogonal to each other on the exposed surfaces of the glass, respectively, and are normally white. And the ZRF controller is configured to minimize the control of the light transmittance of the area of the LCD when the brightness difference of a plurality of areas divided in the image from the data processed by the image processor is within a normal range, It is possible to avoid performing control of the transmittance.

์ƒ๊ธฐ LCD๋Š”, ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์—์„œ ๋‹ค์ˆ˜์˜ ํ”ฝ์…€์„ ํ•˜๋‚˜์˜ ๋‹จ์œ„๋กœ์„œ ๋Œ€์‘ํ•˜๋Š” ์˜์—ญ์„ ๊ฐ€์งˆ ์ˆ˜ ์žˆ๋‹ค.The LCD may have an area corresponding to a plurality of pixels as one unit in the image sensor.

์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€, ํŽธ๊ด‘์˜์—ญ์ด ์ผ๋ฐฉํ–ฅ์œผ๋กœ ๊ท ๋“ฑ ๋˜๋Š” ๋ถˆ๊ท ๋“ฑํ•˜๊ฒŒ ๋ถˆ์—ฐ์†์ ์œผ๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ํŽธ๊ด‘์˜์—ญ์˜ ๋ถˆ์—ฐ์†์ ์ธ ๋ฐฐ์—ด์ด ๋‚˜๋ž€ํ•˜๊ฒŒ ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๋‹ค.In the first and second polarizing plates, polarization regions may be uniformly or unevenly discontinuously formed in one direction, and a plurality of discontinuous arrangements of the polarization regions may be formed side by side.

์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€, ์™€์ด์–ด ๊ทธ๋ฆฌ๋“œ ํŽธ๊ด‘ํŒ(wire grid polarizer)์œผ๋กœ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๋‹ค.The first and second polarizers may be formed of a wire grid polarizer.

์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€, ๊ด‘ํˆฌ๊ณผ์„ฑ ์žฌ์งˆ์˜ ๊ธฐํŒ ์ƒ์— ๊ด‘ํˆฌ๊ณผ์„ฑ์˜ ์œ ์ „์ฒด๋‚˜ ํด๋ฆฌ๋จธ๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ์š”์ฒ ๋ถ€๊ฐ€ ์ผ๋ฐฉํ–ฅ์œผ๋กœ ์š”์ฒ  ํ˜•์ƒ์œผ๋กœ ํŒจํ„ฐ๋‹๋˜์–ด ๋‚˜๋ž€ํ•˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ์š”์ฒ ๋ถ€์˜ ํ™ˆ ๋‚ด์ธก๋งˆ๋‹ค ๋™์ผํ•œ ๋ฐฉํ–ฅ์œผ๋กœ ๊ฒฝ์‚ฌ์ง€๊ฒŒ ๋ฐฑ์ƒ‰๊ธˆ์†์ด ์ฆ์ฐฉ๋  ์ˆ˜ ์žˆ๋‹ค.The first and second polarizing plates are formed on the substrate of the light transmissive material so that the uneven parts made of a light-transmissive dielectric material or polymer are patterned in the uneven shape in one direction and side by side, and are inclined in the same direction for each inside of the grooves of the uneven parts. White metal can be deposited.

์ƒ๊ธฐ ZRF์ œ์–ด๋ถ€๋Š”, ์ƒ๊ธฐ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค.The ZRF controller extracts a light failure region as a region that deviates from a predetermined brightness difference from the overall brightness among the regions of the image, and extracts a correction region as a region that contributes to the formation of the light failure region among the regions of the image sensor. And extracting, as an adjusting region, a region that transmits light irradiated to the correction region from the area of the LCD, and adjusting the light transmittance of the adjusting region to be inversely proportional to the brightness of the light defective region.

๋ณธ ๋ฐœ๋ช…์˜ ๋‹ค๋ฅธ ์ธก๋ฉด์— ๋”ฐ๋ฅด๋ฉด, ๊ด‘์ด ์ž…์‚ฌ๋˜๋Š” ๋ Œ์ฆˆ์œ ๋‹›; ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›์˜ ํ›„๋ฐฉ์— ์„ค์น˜๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ; ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฉ”๋ชจ๋ฆฌ๋ถ€์— ์ €์žฅ๋˜๋„๋ก ์ œ์–ดํ•˜๋Š” ๋ฉ”์ธ์ œ์–ด๋ถ€; ๋ฐ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋„๋ก ์„ค์น˜๋˜๋Š” ํ™”์งˆ๊ฐœ์„ ๋ถ€๋ฅผ ํฌํ•จํ•˜๊ณ , ์ƒ๊ธฐ ํ™”์งˆ๊ฐœ์„ ๋ถ€๋Š”, ๋ณธ ๋ฐœ๋ช…์˜ ์ผ์ธก๋ฉด์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜์ธ, ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜๊ฐ€ ์ œ๊ณต๋œ๋‹ค.According to another aspect of the invention, the lens unit is incident light; An image sensor installed at the rear of the lens unit; A main control unit controlling the image acquired by the image sensor to be stored in a memory unit; And an image quality improvement unit installed to control the light transmittance irradiated to the image sensor so as to reduce the brightness difference between the regions in the image acquired by the image sensor. The image quality improvement unit may further improve image quality according to an aspect of the present invention. A digital photographing apparatus, which is an apparatus, is provided.

์ƒ๊ธฐ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜๋Š”, ํœด๋Œ€์šฉ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ, CCTV์šฉ ์นด๋ฉ”๋ผ, ํœด๋Œ€์šฉ ์ „์ž๊ธฐ๊ธฐ์˜ ์นด๋ฉ”๋ผ, ์›น ์นด๋ฉ”๋ผ, ๋น„์ ผ๊ฒ€์‚ฌ๊ธฐ์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ, ๋ธ”๋ž™๋ฐ•์Šค์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ ์ค‘ ์–ด๋Š ํ•˜๋‚˜์ผ ์ˆ˜ ์žˆ๋‹ค.The digital photographing apparatus may be any one of a portable digital camera, a CCTV camera, a camera of a portable electronic device, a web camera, a camera module of a vision inspector, and a camera module of a black box.

๋ณธ ๋ฐœ๋ช…์˜ ๋˜ ๋‹ค๋ฅธ ์ธก๋ฉด์— ๋”ฐ๋ฅด๋ฉด, ๊ด‘์ด ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ZRF(Zone collected Reduction Filter)๋ฅผ ํ†ต๊ณผํ•˜์—ฌ ์กฐ์‚ฌ๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ๋กœ๋ถ€ํ„ฐ ์˜์ƒ์„ ํš๋“ํ•˜๋Š” ๋‹จ๊ณ„; ์ƒ๊ธฐ ์˜์ƒ์„ ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๋Š” ๋‹จ๊ณ„; ์ƒ๊ธฐ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๋Š” ๋‹จ๊ณ„; ๋ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ ZRF์˜ LCD์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋Š” ๋‹จ๊ณ„;๋ฅผ ํฌํ•จํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์ด ์ œ๊ณต๋œ๋‹ค.According to another aspect of the invention, the step of obtaining an image from the image sensor irradiated with light passing through the lens unit and Zone collected Reduction Filter (ZRF); Processing the image into data; Calculating brightness of a plurality of divided regions of the image from the data; And controlling light transmittance for a plurality of divided regions in the LCD of the ZRF so as to reduce the brightness difference between the regions in the image.

์ƒ๊ธฐ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•˜๋Š” ๋‹จ๊ณ„๋Š”, ์ƒ๊ธฐ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค.The adjusting of the light transmittance may include extracting a light defective area as an area deviating from a predetermined brightness difference from the overall brightness among the areas of the image, and correcting it as an area contributing to the formation of the light defective area from the area of the image sensor. An area may be extracted, and an area for transmitting light irradiated to the correction area among the areas of the LCD may be extracted as an adjustment area, and the light transmittance of the adjustment area may be adjusted in inverse proportion to the brightness of the light defective area.

๋ณธ ๋ฐœ๋ช…์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜, ์ด๋ฅผ ๊ฐ€์ง€๋Š” ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜ ๋ฐ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์— ์˜ํ•˜๋ฉด, ํ•˜๋‚˜์˜ ํ™”๋ฉด ๋‚ด์—์„œ ์˜์—ญ๋ณ„ ๊ด‘ํฌํ™” ๋˜๋Š” ๊ด‘๋ถ€์กฑ์œผ๋กœ ์ธํ•ด ๊ณผ๋„ํ•œ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์กด์žฌํ•  ๊ฒฝ์šฐ, ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋œ ZRF(Zone collected Reduction Filter)์— ์˜ํ•ด ๋ถ€๋ถ„๋ณ„ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•จ์œผ๋กœ์จ, ์„ ๋ช…๋„์™€ ์ƒ‰์žฌํ˜„์„ฑ์ด ์šฐ์ˆ˜ํ•œ ์˜์ƒ์„ ํš๋“ํ•  ์ˆ˜ ์žˆ๊ณ , ํ™”๋ฉด ๋ฐ๊ธฐ์ฐจ์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜์˜ ๋ถ„ํ•ด๋Šฅ ์ €๊ฐ ํšจ๊ณผ๋ฅผ ์ค„์ผ ์ˆ˜ ์žˆ๋‹ค.According to the image quality improving apparatus, the digital photographing apparatus having the same, and the image quality improving method according to the present invention, when there is an excessive brightness difference due to light saturation or light deficiency for each region in one screen, a ZRF ( By adjusting the light transmittance for each part by Zone collected Reduction Filter, it is possible to obtain an image with excellent clarity and color reproducibility, and to reduce the resolution reduction effect of the digital photographing apparatus according to the screen brightness difference.

๋„ 1์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜๋ฅผ ๋„์‹œํ•œ ๊ตฌ์„ฑ๋„์ด๋‹ค.1 is a block diagram showing a digital photographing apparatus according to an embodiment of the present invention.

๋„ 2๋Š” ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜์—์„œ ZRF๋ฅผ ๋„์‹œํ•œ ๋‹จ๋ฉด๋„์ด๋‹ค.2 is a cross-sectional view illustrating ZRF in a digital photographing apparatus according to an embodiment of the present invention.

๋„ 3์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜์—์„œ ์ œ 1 ํ‰๊ด‘ํŒ์„ ๋„์‹œํ•œ ํ‰๋ฉด๋„์ด๋‹ค.3 is a plan view illustrating a first flat plate in the digital photographing apparatus according to the exemplary embodiment of the present invention.

๋„ 4๋Š” ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜์—์„œ ์ œ 2 ํŽธ๊ด‘ํŒ์„ ๋„์‹œํ•œ ํ‰๋ฉด๋„์ด๋‹ค.4 is a plan view illustrating a second polarizing plate in a digital photographing apparatus according to an embodiment of the present invention.

๋„ 5๋Š” ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜์—์„œ ์ œ 1 ํ‰๊ด‘ํŒ์˜ ๋‹ค๋ฅธ ์˜ˆ๋ฅผ ๋„์‹œํ•œ ํ‰๋ฉด๋„์ด๋‹ค.5 is a plan view illustrating another example of the first flat plate in the digital photographing apparatus according to the exemplary embodiment.

๋„ 6์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜์—์„œ ์ œ 2 ํ‰๊ด‘ํŒ์˜ ๋‹ค๋ฅธ ์˜ˆ๋ฅผ ๋„์‹œํ•œ ํ‰๋ฉด๋„์ด๋‹ค.6 is a plan view illustrating another example of the second flat plate in the digital photographing apparatus according to the exemplary embodiment of the present invention.

๋„ 7์€ ๋„ 5 ๋ฐ ๋„ 6์˜ ๋‹จ๋ฉด๋„์ด๋‹ค.7 is a cross-sectional view of FIGS. 5 and 6.

๋„ 8 ๋ฐ ๋„ 9๋Š” ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜์˜ ๋™์ž‘์„ ์„ค๋ช…ํ•˜๊ธฐ ์œ„ํ•œ ๊ฐœ๋…๋„์ด๋‹ค.8 and 9 are conceptual views for explaining the operation of the image quality improving apparatus according to an embodiment of the present invention.

๋„ 10์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์„ ๋„์‹œํ•œ ํ๋ฆ„๋„์ด๋‹ค.10 is a flowchart illustrating a method of improving image quality according to an embodiment of the present invention.

๋ณธ ๋ฐœ๋ช…์€ ๋‹ค์–‘ํ•œ ๋ณ€๊ฒฝ์„ ๊ฐ€ํ•  ์ˆ˜ ์žˆ๊ณ , ์—ฌ๋Ÿฌ ๊ฐ€์ง€ ์‹ค์‹œ๋ก€๋ฅผ ๊ฐ€์งˆ ์ˆ˜ ์žˆ๋Š” ๋ฐ”, ํŠน์ • ์‹ค์‹œ๋ก€๋“ค์„ ๋„๋ฉด์— ์˜ˆ์‹œํ•˜๊ณ , ์ƒ์„ธํ•˜๊ฒŒ ์„ค๋ช…ํ•˜๊ณ ์ž ํ•œ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜, ์ด๋Š” ๋ณธ ๋ฐœ๋ช…์„ ํŠน์ •ํ•œ ์‹ค์‹œ ํ˜•ํƒœ์— ๋Œ€ํ•ด ํ•œ์ •ํ•˜๋ ค๋Š” ๊ฒƒ์ด ์•„๋‹ˆ๊ณ , ๋ณธ ๋ฐœ๋ช…์˜ ๊ธฐ์ˆ  ์‚ฌ์ƒ ๋ฐ ๊ธฐ์ˆ  ๋ฒ”์œ„์— ํฌํ•จ๋˜๋Š” ๋ชจ๋“  ๋ณ€๊ฒฝ, ๊ท ๋“ฑ๋ฌผ ๋‚ด์ง€ ๋Œ€์ฒด๋ฌผ์„ ํฌํ•จํ•˜๋Š” ์‹์œผ๋กœ ์ดํ•ด๋˜์–ด์•ผ ํ•˜๊ณ , ์—ฌ๋Ÿฌ ๊ฐ€์ง€ ๋‹ค๋ฅธ ํ˜•ํƒœ๋กœ ๋ณ€ํ˜•๋  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ๋ณธ ๋ฐœ๋ช…์˜ ๋ฒ”์œ„๊ฐ€ ํ•˜๊ธฐ ์‹ค์‹œ๋ก€์— ํ•œ์ •๋˜๋Š” ๊ฒƒ์€ ์•„๋‹ˆ๋‹ค. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to the specific embodiments, but should be understood in a way that includes all changes, equivalents, and substitutes included in the spirit and scope of the present invention, and may be modified in various other forms. It is to be understood that the scope of the present invention is not limited to the following examples.

์ดํ•˜, ์ฒจ๋ถ€๋œ ๋„๋ฉด์„ ์ฐธ์กฐํ•˜์—ฌ ๋ณธ ๋ฐœ๋ช…์— ๋”ฐ๋ฅธ ์‹ค์‹œ๋ก€๋ฅผ ์ƒ์„ธํžˆ ์„ค๋ช…ํ•˜๋ฉฐ, ๋„๋ฉด ๋ถ€ํ˜ธ์— ๊ด€๊ณ„์—†์ด ๋™์ผํ•˜๊ฑฐ๋‚˜ ๋Œ€์‘ํ•˜๋Š” ๊ตฌ์„ฑ์š”์†Œ์— ๋Œ€ํ•ด์„œ๋Š” ๋™์ผํ•œ ์ฐธ์กฐ ๋ฒˆํ˜ธ๋ฅผ ๋ถ€์—ฌํ•˜๊ณ , ์ด์— ๋Œ€ํ•ด ์ค‘๋ณต๋˜๋Š” ์„ค๋ช…์„ ์ƒ๋žตํ•˜๊ธฐ๋กœ ํ•œ๋‹ค.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and like reference numerals denote the same or corresponding elements regardless of reference numerals, and redundant description thereof will be omitted.

๋„ 1์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜๋ฅผ ๋„์‹œํ•œ ๊ตฌ์„ฑ๋„์ด๋‹ค.1 is a block diagram showing a digital photographing apparatus according to an embodiment of the present invention.

๋„ 1์„ ์ฐธ์กฐํ•˜๋ฉด, ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜(200)๋Š” ๋ Œ์ฆˆ์œ ๋‹›(210), ์ด๋ฏธ์ง€์„ผ์„œ(220), ๋ฉ”์ธ์ œ์–ด๋ถ€(240) ๋ฐ ํ™”์งˆ๊ฐœ์„ ๋ถ€๋ฅผ ํฌํ•จํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํœด๋Œ€์šฉ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ, CCTV์šฉ ์นด๋ฉ”๋ผ, ํœด๋Œ€์šฉ ์ „์ž๊ธฐ๊ธฐ์˜ ์นด๋ฉ”๋ผ, ์›น ์นด๋ฉ”๋ผ, ๋น„์ ผ๊ฒ€์‚ฌ๊ธฐ์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ, ๋ธ”๋ž™๋ฐ•์Šค์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ ์ค‘ ์–ด๋Š ํ•˜๋‚˜๋ฅผ ๋น„๋กฏํ•˜์—ฌ, ๋‹ค์–‘ํ•œ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜๊ฐ€ ํ•ด๋‹น๋  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ์‚ฌ์šฉ ํ˜•ํƒœ์— ๋”ฐ๋ผ ์นด๋ฉ”๋ผ๋กœ์„œ์˜ ๊ธฐ๋Šฅ์„ ์ˆ˜ํ–‰ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ, ์ผ€์ด์‹ฑ, ๋””์Šคํ”Œ๋ ˆ์ด๋ถ€, ์กฐ์ž‘๋ถ€, ๋ฐฐํ„ฐ๋ฆฌ ๋“ฑ์„ ๋น„๋กฏํ•˜์—ฌ, ํ•„์š”ํ•œ ๋ถ€๊ฐ€๊ตฌ์„ฑ์ด ์ถ”๊ฐ€๋  ์ˆ˜ ์žˆ๋‹ค. ์—ฌ๊ธฐ์„œ ํœด๋Œ€์šฉ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ๋Š” ์ปดํŒฉํŠธ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ, DSLR(Digital Single Lens Reflex) ์นด๋ฉ”๋ผ, ๋ฏธ๋Ÿฌ๋ฆฌ์Šค ์นด๋ฉ”๋ผ๋ฅผ ๋น„๋กฏํ•˜์—ฌ ํœด๋Œ€๊ฐ€ ๊ฐ€๋Šฅํ•œ ๋‹ค์–‘ํ•œ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜๋ฅผ ํฌํ•จํ•  ์ˆ˜ ์žˆ๋‹ค.Referring to FIG. 1, the digital photographing apparatus 200 according to an exemplary embodiment may include a lens unit 210, an image sensor 220, a main controller 240, and an image quality improving unit. Including any one of CCTV camera, camera of portable electronic device, web camera, camera module of vision inspector, camera module of black box, various digital photographing devices may be applicable, and it functions as a camera according to the use type. To this end, necessary additional components may be added, including a casing, a display unit, an operation unit, a battery, and the like. The portable digital camera may include a compact digital camera, a digital single lens reflex (DSLR) camera, a mirrorless camera, and various portable digital photographing apparatuses.

๋ Œ์ฆˆ์œ ๋‹›(210)์€ ์ด๋ฏธ์ง€์„ผ์„œ(120)์— ์ƒ์ด ๋งบํžˆ๋„๋ก ๊ด‘์„ ๋ชจ์œผ๋Š” ์—ญํ• ์„ ํ•˜๋Š”๋ฐ, ์ด๋ฅผ ์œ„ํ•ด ๋‹จ์ผ ๋˜๋Š” ๋‹ค์ˆ˜์˜ ๋ Œ์ฆˆ๋ฅผ ํฌํ•จํ•  ์ˆ˜ ์žˆ๋‹ค. The lens unit 210 collects light to form an image on the image sensor 120. For this purpose, the lens unit 210 may include a single lens or a plurality of lenses.

์ด๋ฏธ์ง€์„ผ์„œ(220)๋Š” ๋ Œ์ฆˆ์œ ๋‹›(210)์˜ ํ›„๋ฐฉ์— ์„ค์น˜๋˜๊ณ , CCD(Charge Coupled Device)๋‚˜ CMOS(Complementary Metal Oxide Semiconductor)๋กœ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ์œผ๋ฉฐ, ์นฉ ๋ฉด์— ์ดˆ์ ์„ ๋งบ์€ ์˜์ƒ์ด ๊ฐœ๊ฐœ์˜ ์š”์†Œ์ƒ์— ์ „ํ•˜ ํŒจํ‚ท์œผ๋กœ ์ถ•์ ๋˜๊ณ , ์ด๋“ค ํŒจํ‚ท์ด ์ถœ๋ ฅ๋˜์–ด ์˜์ƒ์œผ๋กœ ๋ณ€ํ™˜ ์ฒ˜๋ฆฌ๋˜์–ด ํ‘œ์‹œ๋˜๋„๋ก ํ•œ๋‹ค. ํ•œํŽธ, ์ด๋ฏธ์ง€์„ผ์„œ(220)์˜ ์ „๋ฐฉ์—๋Š” ๋ Œ์ฆˆ์œ ๋‹›(210)์˜ ํ›„๋ฐฉ์— ์œ„์น˜ํ•˜๋„๋ก IR ์ปท ํ•„ํ„ฐ(IR cut fillter; 230)๊ฐ€ ์„ค์น˜๋  ์ˆ˜ ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ IR ์ปท ํ•„ํ„ฐ(230)๋Š” ์ด๋ฏธ์ง€์„ผ์„œ๊ฐ€ ๊ฐ€์‹œ๊ด‘์„  ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ, ์ ์™ธ์„ ๋„ ๊ด‘์œผ๋กœ ์ธ์‹ํ•˜์—ฌ ๋ฐ˜์‘ํ•˜๊ฒŒ ๋จ์œผ๋กœ์จ, ๋ˆˆ์œผ๋กœ ์ธ์‹ํ•˜๋Š” ์ƒ‰๊ฐ๊ณผ ๋‹ค๋ฅธ ์ƒ‰๊ฐ์œผ๋กœ ๋‚˜ํƒ€๋‚ด๋ฏ€๋กœ, ์ด๋ฅผ ๊ฐœ์„ ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ ์™ธ์„ ์„ ์ฐจ๋‹จํ•˜๋„๋ก ํ•˜๋Š” ํ•„ํ„ฐ์ด๋‹ค.The image sensor 220 is installed at the rear of the lens unit 210 and may be formed of a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and an image focused on a chip surface is charged on an individual element. Accumulated in packets, these packets are output and converted into video for display. Meanwhile, an IR cut filter 230 may be installed at the front of the image sensor 220 to be positioned behind the lens unit 210. The IR cut filter 230 is a filter for blocking the infrared rays to improve the color sensor because the image sensor recognizes not only visible light but also infrared light, and reacts with light.

๋ฉ”์ธ์ œ์–ด๋ถ€(240)๋Š” ์กฐ์ž‘๋ถ€์— ์˜ํ•œ ์กฐ์ž‘์‹ ํ˜ธ๋‚˜ ๋ฏธ๋ฆฌ ์ •ํ•ด์ง„ ํ”„๋กœ์„ธ์Šค์— ๋”ฐ๋ผ ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฉ”๋ชจ๋ฆฌ๋ถ€(250)์— ๋ฐ์ดํ„ฐ๋กœ ์ €์žฅ๋˜๋„๋ก ์ œ์–ดํ•˜๊ณ , ํ•„์š”์— ๋”ฐ๋ผ ๋””์Šคํ”Œ๋ ˆ์ด๋ถ€๋ฅผ ํ†ตํ•ด์„œ ์™ธ๋ถ€๋กœ ์ถœ๋ ฅํ•˜๋„๋ก ์ œ์–ดํ•  ์ˆ˜ ์žˆ๋‹ค. The main controller 240 controls the image acquired by the image sensor 220 to be stored as data in the memory unit 250 according to an operation signal or a predetermined process by the operation unit, and outputs the data to the outside through the display unit as necessary. Can be controlled.

ํ™”์งˆ๊ฐœ์„ ๋ถ€๋Š” ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋„๋ก ์„ค์น˜๋˜๋Š”๋ฐ, ์ด๋Š” ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜(100)๋กœ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๋‹ค. ๋”ฐ๋ผ์„œ, ํ™”์งˆ๊ฐœ์„ ๋ถ€์— ๋Œ€ํ•ด์„œ๋Š” ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜(100)๋กœ ๋Œ€์‹  ์„ค๋ช…ํ•˜๊ธฐ๋กœ ํ•œ๋‹ค.The image quality improvement unit is installed to control the light transmittance irradiated to the image sensor 220 to reduce the brightness difference between the regions in the image obtained by the image sensor 220, which is an image quality improving apparatus according to an embodiment of the present invention ( 100). Therefore, the image quality improvement unit will be described instead with the image quality improvement apparatus 100 according to an embodiment of the present invention.

๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜(100)๋Š” ZRF(Zone collected Reduction Filter; 110), ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120) ๋ฐ ZRF์ œ์–ด๋ถ€(130)๋ฅผ ํฌํ•จํ•  ์ˆ˜ ์žˆ๋‹ค. The image quality improving apparatus 100 according to the exemplary embodiment of the present invention may include a zone collected reduction filter (ZRF), an image processor 120, and a ZRF controller 130.

ZRF(110)๋Š” ๋ Œ์ฆˆ์œ ๋‹›(210)๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ(220) ์‚ฌ์ด์— ์„ค์น˜๋˜์–ด, ๋ Œ์ฆˆ์œ ๋‹›(210)์„ ํ†ต๊ณผํ•œ ๊ด‘์„ ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์กฐ์‚ฌํ•˜๋„๋ก ํˆฌ๊ณผ์‹œํ‚ค๊ณ , ํ”ฝ์…€(pixel)๋ฐฉ์‹์œผ๋กœ ๊ตฌ์„ฑ๋˜๋ฉฐ, ์•กํ‹ฐ๋ธŒ ์–ด๋ ˆ์ด(active array)๋ฅผ ๋‘์–ด ๋‹จ์œ„ ์…€ ๊ตฌ๋™์— ์˜ํ•ด ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ๋งˆ๋‹ค ๊ด‘ํˆฌ๊ณผ์œจ์ด ์กฐ์ ˆ๋˜๋Š” LCD(Liquid Crystal Display; 111)(๋„ 2์— ๋„์‹œ)๋ฅผ ๊ฐ€์ง„๋‹ค. LCD(111)๋Š” ํˆฌ๊ณผ์œจ์ด ์กฐ์ ˆ๋˜๋Š” ๋‹ค์ˆ˜์˜ ํ”ฝ์…€๋กœ ์ด๋ฃจ์–ด์ง„๋‹ค. ๋˜ํ•œ ์•กํ‹ฐ๋ธŒ ์–ด๋ ˆ์ด๋Š” ZRF์ œ์–ด๋ถ€(130)์— ์˜ํ•ด ์ œ์–ด๋˜๋ฉฐ, ๋‹จ์ผ ๋˜๋Š” ๋‹ค์ˆ˜์˜ ํ”ฝ์…€๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ๋‹จ์œ„ ์…€ ๊ฐ๊ฐ์— ๊ตฌ๋™์— ํ•„์š”ํ•œ ์ „์›์„ ๊ณต๊ธ‰ํ•˜๋Š” ์ „์› ๊ณต๊ธ‰ ํšŒ๋กœ์ผ ์ˆ˜ ์žˆ๋Š”๋ฐ, ๋‹จ์œ„ ์…€ ๊ฐ๊ฐ์— ๋Œ€ํ•œ ์ „์••์˜ ํฌ๊ธฐ, ์ „์••์˜ ์ธ๊ฐ€์‹œ๊ฐ„์„ ์กฐ์ ˆํ•˜๊ฒŒ ๋œ๋‹ค. ๋”ฐ๋ผ์„œ LCD(111)๋Š” ํ”ฝ์…€์˜ ๊ด‘ํˆฌ๊ด‘์œจ์ด ZRF์ œ์–ด๋ถ€(130)์— ์˜ํ•ด ์ธ๊ฐ€๋˜๋Š” ์ „์••์˜ ํฌ๊ธฐ, ์ „์••์˜ ์ธ๊ฐ€์‹œ๊ฐ„ ๋“ฑ์— ์˜ํ•ด ์กฐ์ ˆ๋  ์ˆ˜ ์žˆ๋‹ค. The ZRF 110 is installed between the lens unit 210 and the image sensor 220, transmits the light passing through the lens unit 210 to the image sensor 220, and is configured in a pixel manner. In addition, an LCD (Liquid Crystal Display) 111 (shown in FIG. 2) has an active array and an optical transmittance is adjusted for each area divided into a plurality of regions by unit cell driving. The LCD 111 is composed of a plurality of pixels whose transmittance is adjusted. In addition, the active array is controlled by the ZRF control unit 130, and may be a power supply circuit for supplying the power required for driving to each of the unit cells consisting of a single or multiple pixels, the size of the voltage for each of the unit cells, The application time is adjusted. Therefore, the LCD 111 may adjust the light transmittance of the pixel by the magnitude of the voltage applied by the ZRF controller 130, the application time of the voltage, and the like.

LCD(111)์—์„œ ์˜์—ญ์€ ZRF์ œ์–ด๋ถ€(130)์— ์˜ํ•ด ๊ด‘ํˆฌ๊ณผ์œจ์ด ์กฐ์ ˆ๋˜๋Š” ํ•˜๋‚˜์˜ ๋‹จ์œ„์ผ ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํ•˜๋‚˜ ๋˜๋Š” ๋‹ค์ˆ˜์˜ ํ”ฝ์…€๋กœ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๊ณ , ZRF์ œ์–ด๋ถ€(130)์— ์˜ํ•ด ๊ทธ ๊ตฌํš์ด ์„ค์ •๋  ์ˆ˜ ์žˆ๋‹ค.In the LCD 111, a region may be one unit in which light transmittance is adjusted by the ZRF controller 130, may be formed of one or a plurality of pixels, and a partition may be set by the ZRF controller 130. .

๋ Œ์ฆˆ์œ ๋‹›(210)๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ(220) ์‚ฌ์ด์— IR ์ปท ํ•„ํ„ฐ(230)๊ฐ€ ๋ถ€๊ฐ€๋˜๋Š” ๊ฒฝ์šฐ, ZRF(110)๋Š” IR ์ปท ํ•„ํ„ฐ(230)์™€ ์ด๋ฏธ์ง€์„ผ์„œ(220) ์‚ฌ์ด์—์„œ ์ด๋ฏธ์ง€์„ผ์„œ(220) ์ธก์œผ๋กœ ์น˜์šฐ์น˜๋„๋ก ์„ค์น˜๋  ์ˆ˜ ์žˆ๋‹ค.When the IR cut filter 230 is added between the lens unit 210 and the image sensor 220, the ZRF 110 moves toward the image sensor 220 between the IR cut filter 230 and the image sensor 220. Can be installed to strike.

๋„ 2๋ฅผ ์ฐธ์กฐํ•˜๋ฉด, ZRF(110)๋Š” ๋ณธ ์‹ค์‹œ๋ก€์—์„œ์ฒ˜๋Ÿผ LCD(111)์˜ ์–‘์ธก๋ฉด์— ๊ธ€๋ž˜์Šค(glass; 112,113)๊ฐ€ ๊ฐ๊ฐ ๋ถ€์ฐฉ๋  ์ˆ˜ ์žˆ๊ณ , ๊ธ€๋ž˜์Šค(112,113) ๊ฐ๊ฐ์˜ ๋…ธ์ถœ๋ฉด์— ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๊ด‘์„ ๊ฐ๊ฐ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ(114,115)์ด ๋ถ€์ฐฉ๋  ์ˆ˜ ์žˆ๋‹ค. ๋˜ํ•œ LCD(111)์—์„œ ๊ฐ ์˜์—ญ์€ ์ด๋ฏธ์ง€์„ผ์„œ(220)์—์„œ ๋‹ค์ˆ˜์˜ ํ”ฝ์…€์— ๋Œ€์‘ํ•˜๋„๋ก ๊ตฌ์„ฑ๋  ์ˆ˜ ์žˆ๋Š”๋ฐ, ์ด๋Š” ํ•˜๋‚˜์˜ ์˜ˆ์‹œ์ผ ๋ฟ, ์ด๋ฏธ์ง€์„ผ์„œ(220)์—์„œ ๋‹จ์ผ ํ”ฝ์…€์— ๋Œ€์‘ํ•˜๋„๋ก ๊ตฌ์„ฑ๋  ์ˆ˜ ์žˆ๋‹ค.Referring to FIG. 2, in the ZRF 110, glass 112 and 113 may be attached to both sides of the LCD 111, as in this embodiment, and light is exposed in the direction orthogonal to each of the exposure surfaces of the glasses 112 and 113. First and second polarizing plates 114 and 115 for polarizing the light emitting diodes may be attached. In addition, each area of the LCD 111 may be configured to correspond to a plurality of pixels in the image sensor 220, which is just one example and may be configured to correspond to a single pixel in the image sensor 220.

๋„ 3 ๋ฐ ๋„ 4์— ๋„์‹œ๋œ ๋ฐ”์™€ ๊ฐ™์ด, ์ œ 1 ๋ฐ ์ œ 2 ํ‰๊ด€ํŒ(114,115) ๊ฐ๊ฐ์€ ์ผ๋ก€๋กœ X์ถ• ๋ฐ Y์ถ• ๋ฐฉํ–ฅ์œผ๋กœ ๊ฐ๊ฐ ํŽธ๊ด‘์‹œํ‚ฌ ์ˆ˜ ์žˆ๊ณ , ์ด์— ํ•œํ•˜์ง€ ์•Š๊ณ , ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๊ฒฝ์‚ฌ๋ฐฉํ–ฅ์œผ๋กœ ํŽธ๊ด‘์‹œํ‚ฌ ์ˆ˜๋„ ์žˆ์œผ๋ฉฐ, ์˜ˆ์ปจ๋Œ€ 0.8~0.96์˜ ํŽธ๊ด‘๋„๋ฅผ ๊ฐ€์งˆ ์ˆ˜ ์žˆ๋‹ค. ๋˜ํ•œ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ(114,115)์€ ์˜ˆ์ปจ๋Œ€ ํŽธ๊ด‘์˜์—ญ(114a,115a), ์ฆ‰ ๊ด‘์„ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์˜์—ญ์ด ์ผ๋ฐฉํ–ฅ์œผ๋กœ ํญ์ด๋‚˜ ๊ธธ์ด๊ฐ€ ๊ท ๋“ฑํ•˜๊ฒŒ ๋ถˆ์—ฐ์†์ ์œผ๋กœ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๊ณ , ํŽธ๊ด‘์˜์—ญ(114a,115a)์˜ ๋ถˆ์—ฐ์†์ ์ธ ๋ฐฐ์—ด์ด ๋‚˜๋ž€ํ•˜๊ฒŒ ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๋‹ค. ๋˜ํ•œ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ(114,115)์€ ๋ณธ ์‹ค์‹œ๋ก€์™€ ๋‹ฌ๋ฆฌ ,ํŽธ๊ด‘์˜์—ญ์ด ์ผ๋ฐฉํ–ฅ์œผ๋กœ ํญ์ด๋‚˜ ๊ธธ์ด๊ฐ€ ๋ถˆ๊ท ๋“ฑํ•˜๊ฒŒ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ์ด ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ, ํŽธ๊ด‘์˜์—ญ์ด ์ „์ฒด์ ์œผ๋กœ ๋‹จ์ผ๋กœ ํ˜•์„ฑ๋  ์ˆ˜๋„ ์žˆ๋‹ค.As shown in FIGS. 3 and 4, each of the first and second flat plate plates 114 and 115 may be polarized in the X-axis and Y-axis directions, for example, but is not limited thereto. For example, it may have a polarization degree of 0.8 ~ 0.96. In addition, the first and second polarizing plates 114 and 115 may be, for example, discontinuously formed in the polarization regions 114a and 115a, that is, regions in which light is polarized, in an equal width or length in one direction, and the polarization regions 114a and 115a. Discontinuous arrays of can be formed in plural alongside. In addition, unlike the present exemplary embodiment, the first and second polarizing plates 114 and 115 may have uneven width or length in one direction, as well as a single polarization area as a whole.

๋„ 5 ๋‚ด์ง€ ๋„ 6์— ๋”ฐ๋ฅด๋ฉด, ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ(116,117)์€ ๋‹ค๋ฅธ ์˜ˆ๋กœ์„œ, ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๊ด‘์„ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์™€์ด์–ด ๊ทธ๋ฆฌ๋“œ ํŽธ๊ด‘ํŒ(wire grid polarizer)์œผ๋กœ ๊ฐ๊ฐ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๋Š”๋ฐ, ์˜ˆ์ปจ๋Œ€ ์œ ๋ฆฌ๋‚˜ ํ•ฉ์„ฑ์ˆ˜์ง€ ๋“ฑ๊ณผ ๊ฐ™์€ ๊ด‘ํˆฌ๊ณผ์„ฑ ์žฌ์งˆ์˜ ๊ธฐํŒ(116c,117c) ์ƒ์— ๊ด‘ํˆฌ๊ณผ์„ฑ์˜ ์œ ์ „์ฒด๋‚˜ ํด๋ฆฌ๋จธ๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ์š”์ฒ ๋ถ€(116a,117a)๊ฐ€ ์ผ๋ฐฉํ–ฅ์œผ๋กœ ์š”์ฒ  ํ˜•์ƒ์œผ๋กœ ํŒจํ„ฐ๋‹(patterning)๋˜์–ด ๋‚˜๋ž€ํ•˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๊ณ , ์š”์ฒ ๋ถ€(116a,117a)์˜ ํ™ˆ ๋‚ด์ธก๋งˆ๋‹ค ๋™์ผํ•œ ๋ฐฉํ–ฅ์œผ๋กœ ๊ฒฝ์‚ฌ์ง€๊ฒŒ ์€์ด๋‚˜ ์•Œ๋ฃจ๋ฏธ๋Š„ ๋“ฑ์˜ ๋ฐฑ์ƒ‰๊ธˆ์†(116b,117b)์ด ์ฆ์ฐฉ๋  ์ˆ˜ ์žˆ๋‹ค. ์š”์ฒ ๋ถ€(116a,117a)์˜ ํŒจํ„ฐ๋‹์€ ํฌํ† ๊ณต์ •, ์—์นญ๊ณต์ • ๋“ฑ๊ณผ ๊ฐ™์€ ๋ฐ˜๋„์ฒด ์ œ์กฐ์šฉ ๋‹จ์œ„ ๊ณต์ •์„ ์ด์šฉํ•˜์—ฌ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๋‹ค. ๊ธฐํŒ(116c,117c)์—์„œ ์š”์ฒ ๋ถ€(116a,117a)์— ๋Œ€์‘ํ•˜๋Š” ํ™ˆ๊ณผ ๋Œ๊ธฐ๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ์š”์ฒ  ํ˜•์ƒ์˜ ์—ด์€ ๋ณธ ์‹ค์‹œ๋ก€์—์„œ์ฒ˜๋Ÿผ ์š”์ฒ ๋ถ€(116a,117a) ๊ฐ๊ฐ์— ๋Œ€์‘๋˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๊ฑฐ๋‚˜, ๋‹ค๋ฅธ ์˜ˆ๋กœ์„œ ๋‹จ์ผ๋กœ ํ˜•์„ฑ๋˜์–ด ํญ๋ฐฉํ–ฅ์œผ๋กœ ์š”์ฒ ๋ถ€(116a,117a)๊ฐ€ ๋‹ค์ˆ˜๋กœ ์ด๊ฒฉ๋˜๋„๋ก ๋‚˜๋ž€ํ•˜๊ฒŒ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๋‹ค.5 to 6, the first and second polarizers 116 and 117 may be each made of a wire grid polarizer that polarizes light in a direction orthogonal to each other, such as glass or synthetic resin. The uneven parts 116a and 117a made of a light-transmitting dielectric or polymer may be formed on the light-transmissive substrates 116c and 117c so as to be patterned in a uneven shape in one direction and arranged side by side. White metals 116b and 117b, such as silver or aluminum, may be deposited to be inclined in the same direction in each of the grooves of the 116a and 117a. The patterning of the uneven parts 116a and 117a may be formed using a unit process for manufacturing a semiconductor, such as a photo process or an etching process. In the substrates 116c and 117c, a plurality of rows of concave-convex shapes consisting of grooves and protrusions corresponding to the concave-convex portions 116a and 117a are formed in plural to correspond to the concave-convex portions 116a and 117a as in this embodiment, or as another example. It may be formed in a single side to be formed side by side so that a plurality of uneven parts 116a, 117a in the width direction.

์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120)๋Š” ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ๋งˆ๋‹ค ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜๋Š” ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๊ณ , ์ด๋ฅผ ZRF์ œ์–ด๋ถ€(130)๋กœ ์ถœ๋ ฅํ•  ์ˆ˜ ์žˆ๋‹ค.The image processor 120 may process the image acquired by the image sensor 220 as data for calculating brightness for each of a plurality of divided regions, and output the data to the ZRF controller 130.

ZRF์ œ์–ด๋ถ€(130)๋Š” ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120)์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๊ณ , ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก LCD(111)์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•œ๋‹ค.The ZRF controller 130 calculates the brightness of a plurality of divided regions of the image from the data processed by the image processor 120, and adjusts the light transmittance of the region of the LCD 111 to reduce the brightness difference between the regions in the image. To control.

ํ•œํŽธ ZRF(110)๋Š” ๋…ธ๋ฉ€๋ฆฌ ํ™”์ดํŠธ(nomally white)๋กœ ๊ตฌ์„ฑ๋จ์œผ๋กœ์จ ์ „์••์ด ์ธ๊ฐ€๋˜์ง€ ์•Š์•˜์„ ๊ฒฝ์šฐ ๊ด‘์ด ํˆฌ๊ณผํ•˜์—ฌ ์ตœ๋Œ€ ํœ˜๋„๋ฅผ ๊ฐ€์ง€๋„๋ก ํ•  ์ˆ˜ ์žˆ๋‹ค. ์ด ๊ฒฝ์šฐ ZRF์ œ์–ด๋ถ€(130)๋Š” ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120)์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์—์„œ ์ž„์˜์˜ ์„ค์ •์— ์˜ํ•ด ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์ •์ƒ ๋ฒ”์œ„, ์˜ˆ์ปจ๋Œ€ ํ™”์งˆ ์ €ํ•˜๋ฅผ ๊ณ ๋ คํ•˜์ง€ ์•Š์„ ์ •๋„์˜ ๋ฐ๊ธฐ์ฐจ ๋ฒ”์œ„ ๋‚ด์ธ ๊ฒฝ์šฐ, LCD(111)์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ตœ์†Œ ๋‹จ๊ณ„๋กœ ํ•˜๊ฑฐ๋‚˜, ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ˆ˜ํ–‰ํ•˜์ง€ ์•Š๋„๋ก ํ•  ์ˆ˜ ์žˆ๋‹ค. ์—ฌ๊ธฐ์„œ ์ตœ์†Œ ๋‹จ๊ณ„๋Š” LCD(111)์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ๋‹ค์ˆ˜์˜ ๋‹จ๊ณ„๋กœ ์„ค์ •ํ•  ๊ฒฝ์šฐ, ๊ด‘ํˆฌ๊ณผ์œจ์˜ ๋ณ€ํ™”๋ฅผ ์ตœ์†Œ๋กœ ํ•˜๋Š” ๋‹จ๊ณ„๋ฅผ ์˜๋ฏธํ•  ์ˆ˜ ์žˆ๊ณ , ์ด ๊ฒฝ์šฐ, ์ƒ๊ธฐํ•œ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฐœ์ƒ์‹œํ‚ค๋Š” ์˜์—ญ์— ๋Œ€์‘๋˜๋Š” LCD(111)์˜ ์˜์—ญ์— ๋Œ€ํ•ด์„œ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋‹ค. On the other hand, the ZRF 110 is configured to be normally white, so that when no voltage is applied, light may be transmitted to have maximum luminance. In this case, the ZRF controller 130 may be configured such that the brightness difference of the area divided into a plurality of regions by arbitrary setting from the data processed by the image processor 120 may be reduced to a normal range, for example, deterioration in image quality. When the brightness difference is within a range that is not considered, the control of the light transmittance of the area of the LCD 111 may be minimized, or the control of the light transmittance may not be performed. Here, the minimum step may refer to a step of minimizing the change in the light transmittance when the light transmittance of the area of the LCD 111 is set to a plurality of steps. In this case, the brightness difference between the areas in the image may be generated. The area of the LCD 111 corresponding to the area may be performed.

ZRF์ œ์–ด๋ถ€(130)๋Š” ์˜ˆ์ปจ๋Œ€ ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“ํ•œ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ, ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ด๋ฏธ์ง€์„ผ์„œ(220)์˜ ์˜์—ญ ์ค‘์—์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, LCD(111)์˜ ์˜์—ญ ์ค‘์—์„œ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค. ์—ฌ๊ธฐ์„œ ์ „์ฒด๋ฐ๊ธฐ๋ž€ ์˜์ƒ์˜ ์ „์ฒด์— ๋Œ€ํ•œ ๋ฐ๊ธฐ๋ฅผ ๋“ฑ๊ธ‰์ด๋‚˜ ์ˆ˜์น˜๋ณ„๋กœ ์ •ํ•œ ๊ฒƒ์ด๊ฑฐ๋‚˜, ์˜์ƒ์˜ ์˜์—ญ๋ณ„ ๋ฐ๊ธฐ ์ •๋„๋ฅผ ๋“ฑ๊ธ‰์ด๋‚˜ ์ˆ˜์น˜๋ณ„๋กœ ์ •ํ•˜์—ฌ ์ด๋ฅผ ํ‰๊ท ํ•œ ๊ฒƒ์ด๊ฑฐ๋‚˜, ๊ทธ ๋ฐ–์— ๋ฐ๊ธฐ์ฐจ๋ฅผ ์‚ฐ์ถœ ๋ฐ ํŒ๋‹จํ•  ์ˆ˜ ์žˆ๋Š” ๋‹ค์–‘ํ•œ ๋ฐฉ์‹์œผ๋กœ ์ •์˜๋  ์ˆ˜ ์žˆ๋‹ค. ๋˜ํ•œ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ž€ ์ผ๋ถ€ ๋˜๋Š” ์ „์ฒด ์˜์—ญ๊ณผ ์–ด๋Š ํ•˜๋‚˜์˜ ์˜์—ญ๊ฐ„ ๋ฐ๊ธฐ์ฐจ์˜ ํ—ˆ์šฉ ๋ฒ”์œ„๋ฅผ ๋“ฑ๊ธ‰์ด๋‚˜ ์ˆ˜์น˜๋กœ ๋‚˜ํƒ€๋‚ผ ๊ฒƒ์„ ์˜๋ฏธํ•  ์ˆ˜ ์žˆ๋‹ค.For example, the ZRF controller 130 extracts a light defective area from a region of an image acquired by the image sensor 220 and deviates from a predetermined brightness difference compared to the overall brightness. The correction region is extracted as a region contributing to the formation of the light, and the region which transmits the light irradiated to the correction region is extracted as the adjustment region, and the light transmittance of the adjustment region is inversely proportional to the brightness of the light defective region. Can be adjusted. Here, the overall brightness is the brightness of the whole image by the grade or numerical value, the brightness degree of each image area is determined by the grade or the numerical value and averaged, or other methods of calculating and determining the brightness difference. It can be defined as. In addition, the predetermined brightness difference may mean that an allowable range of the brightness difference between some or all areas and any one area is represented by a grade or a numerical value.

๋„ 8์„ ์ฐธ์กฐํ•˜๋ฉด, ZRF์ œ์–ด๋ถ€(130)๋Š” ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“ํ•œ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ, ์˜ˆ์ปจ๋Œ€ ๊ฐ•ํ•œ ๊ด‘์„ ๋ฐœ์‚ฐํ•˜๋Š” ํ”ผ์‚ฌ์ฒด๋กœ ์ธํ•ด ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ๊ณผ๋„ํ•˜๊ฒŒ ๋ฐ์€ ์˜์—ญ์œผ๋กœ์„œ ๊ด‘ํฌํ™”์— ํ•ด๋‹นํ•˜๋Š” ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ด๋ฏธ์ง€์„ผ์„œ(220)์˜ ์˜์—ญ(221,222) ์ค‘์—์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ(222)์„ ์ถ”์ถœํ•˜๋ฉฐ, LCD(111)์˜ ์˜์—ญ(111a,111b) ์ค‘์—์„œ ๋ณด์ •์˜์—ญ(222)์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ(111b)์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์กฐ์ ˆ์˜์—ญ(111b)์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋”ฐ๋ผ ์„ค์ •๋œ ๋น„์œจ๋กœ ๋‚ฎ์ถ”๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค. ์ด๋•Œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ, ๋ณด์ •์˜์—ญ(222), ์กฐ์ ˆ์˜์—ญ(111b)์€ ํ•ด๋‹นํ•˜๋Š” ๋Œ€์ƒ์—์„œ ์„ค์ •์— ์˜ํ•ด ๊ตฌํš๋œ ์˜์—ญ ์ค‘์—์„œ ๋‹จ์ผ ์˜์—ญ์œผ๋กœ ์ด๋ฃจ์–ด์ง€๊ฑฐ๋‚˜, ๋‹ค์ˆ˜์˜ ์˜์—ญ์œผ๋กœ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๊ณ , ๋ณธ ์‹ค์‹œ๋ก€์—์„œ๋Š” ๋ณด์ •์˜์—ญ(222)์ด 4๊ฐœ์˜ ์˜์—ญ์œผ๋กœ ์ด๋ฃจ์–ด์ง์„ ๋‚˜ํƒ€๋‚ด๋ฉฐ, ์กฐ์ ˆ์˜์—ญ(111b)์ด 1๊ฐœ์˜ ์˜์—ญ์œผ๋กœ ์ด๋ฃจ์–ด์ง์„ ์˜ˆ์‹œ์ ์œผ๋กœ ๋‚˜ํƒ€๋‚ธ๋‹ค.Referring to FIG. 8, the ZRF controller 130 may include light corresponding to light saturation in an area of an image acquired by the image sensor 220, for example, an area that is excessively brighter than the overall brightness due to a subject emitting strong light. Defect area is extracted, and the correction area 222 is extracted as an area contributing to the formation of the light defective area from the areas 221 and 222 of the image sensor 220, and the correction area is selected from the areas 111a and 111b of the LCD 111. An area through which light irradiated at 222 is transmitted may be extracted as the adjustment area 111b, and the light transmittance of the adjustment area 111b may be adjusted to be lowered at a ratio set according to the brightness of the light defective area. In this case, the light defective area, the correction area 222, and the adjustment area 111b may be composed of a single area or a plurality of areas among the areas partitioned by the setting in the corresponding object. ) Represents four regions, and the adjusting region 111b exemplarily consists of one region.

๋„ 9๋ฅผ ์ฐธ์กฐํ•˜๋ฉด, ZRF์ œ์–ด๋ถ€(130)๋Š” ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“ํ•œ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ, ์˜ˆ์ปจ๋Œ€ ์—ญ๊ด‘์œผ๋กœ ์ธํ•œ ์–ด๋‘์šด ํ”ผ์‚ฌ์ฒด๋กœ ์ธํ•ด ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ๊ณผ๋„ํ•˜๊ฒŒ ์–ด๋‘์šด ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถ€์กฑ์— ํ•ด๋‹นํ•˜๋Š” ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ด๋ฏธ์ง€์„ผ์„œ(220)์˜ ์˜์—ญ(221,222) ์ค‘์—์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ(222)์„ ์ถ”์ถœํ•˜๋ฉฐ, LCD(111)์˜ ์˜์—ญ(111a,111b) ์ค‘์—์„œ ๋ณด์ •์˜์—ญ(222)์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ(111b)์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์กฐ์ ˆ์˜์—ญ(111b)์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋”ฐ๋ผ ์„ค์ •๋œ ๋น„์œจ๋กœ ๋†’์ด๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค.Referring to FIG. 9, the ZRF controller 130 may have a light deficiency corresponding to a light shortage as an area that is excessively dark compared to the overall brightness due to a dark subject caused by backlight, for example, in an area of an image acquired by the image sensor 220. The region is extracted, and the correction region 222 is extracted as an area contributing to the formation of the light defective region among the regions 221 and 222 of the image sensor 220, and the correction region (from the regions 111a and 111b of the LCD 111). The area for transmitting the light irradiated to 222 may be extracted as the adjustment area 111b, and the light transmittance of the adjustment area 111b may be adjusted to be set at a ratio set according to the brightness of the light defective area.

๋„ 10์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์„ ๋„์‹œํ•œ ํ๋ฆ„๋„์ด๋‹ค. ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์€ ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜(100)๋ฅผ ์ด์šฉํ•œ ๋ฐฉ๋ฒ•์œผ๋กœ์„œ, ์•ž์„œ ์„ค๋ช…ํ•œ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜(100)์˜ ZRF(110), ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120) ๋ฐ ZRF์ œ์–ด๋ถ€(130) ๋“ฑ์— ๋Œ€ํ•œ ๊ตฌ์„ฑ๊ณผ ๊ทธ ์‹ค์‹œ๋ก€๋“ค์ด ๋™์ผํ•˜๊ฒŒ ์ ์šฉ๋˜๋ฏ€๋กœ, ์ด๋“ค ๊ตฌ์„ฑ๋“ค์— ๋Œ€ํ•œ ์„ค๋ช…์„ ์ƒ๋žตํ•˜๊ธฐ๋กœ ํ•œ๋‹ค.10 is a flowchart illustrating a method of improving image quality according to an embodiment of the present invention. The image quality improving method according to an embodiment of the present invention is a method using the image quality improving apparatus 100 according to an embodiment of the present invention, and the ZRF 110 and the image processing unit 120 of the image quality improving apparatus 100 described above. Since the configuration of the ZRF control unit 130 and the like and the embodiments thereof are applied in the same manner, a description of these configurations will be omitted.

๋„ 10์„ ์ฐธ์กฐํ•˜๋ฉด, ๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์€ ๊ด‘์ด ๋ Œ์ฆˆ์œ ๋‹›(210)๊ณผ ZRF(Zone collected Reduction Filter; 110)๋ฅผ ํ†ต๊ณผํ•˜์—ฌ ์กฐ์‚ฌ๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ(220)๋กœ๋ถ€ํ„ฐ ์˜์ƒ์„ ํš๋“ํ•œ๋‹ค(S11). ๊ทธ๋Ÿฐ ๋‹ค์Œ, ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“ํ•œ ์˜์ƒ์„ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120)์— ์˜ํ•ด ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•œ๋‹ค(S12). ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€(120)์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ZRF์ œ์–ด๋ถ€(130)๊ฐ€ ์‚ฐ์ถœํ•˜๋„๋ก ํ•œ๋‹ค(S13). CFR์ œ์–ด๋ถ€(130)๋Š” ์˜์ƒ์˜ ์˜์—ญ๋ณ„ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๋ฉด, ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ZRF(110)์˜ LCD(111)์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•œ๋‹ค(S14). Referring to FIG. 10, in the image quality improving method according to an embodiment of the present invention, an image is acquired from an image sensor 220 in which light is irradiated through the lens unit 210 and a zone collected reduction filter (ZRF) 110. (S11). Then, the image acquired by the image sensor 220 is processed by the image processor 120 as data (S12). The ZRF controller 130 calculates the brightness of a plurality of divided regions of the image from the data processed by the image processor 120 (S13). When the CFR controller 130 calculates the brightness for each region of the image, the CFR controller 130 controls the light transmittance for a plurality of regions divided by the LCD 111 of the ZRF 110 to reduce the brightness difference between the regions in the image (S14).

๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•˜๋Š” ๋‹จ๊ณ„(S14)๋Š” ZRF์ œ์–ด๋ถ€(130)์— ์˜ํ•ด, ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ํš๋“ํ•œ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ด๋ฏธ์ง€์„ผ์„œ(220)์˜ ์˜์—ญ ์ค‘์—์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, LCD(111)์˜ ์˜์—ญ ์ค‘์—์„œ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค. ์ด์— ๋Œ€ํ•œ ๊ตฌ์ฒด์ ์ธ ์„ค๋ช…์€ ์•ž์„œ ๋„ 8 ๋ฐ ๋„ 9๋ฅผ ์˜ˆ๋กœ ๋“ค์–ด ์„ค๋ช…ํ•œ ๋ฐ”์™€ ๊ฐ™๋‹ค.In step S14, the light transmittance is adjusted by the ZRF controller 130 to extract a light defective area from the area of the image acquired by the image sensor 220 as an area deviating from a predetermined brightness difference compared to the overall brightness. The correction region is extracted from the region of the sensor 220 as a region contributing to the formation of the light defective region, and the region transmitting the light irradiated to the correction region from the region of the LCD 111 is extracted as the adjusting region. The light transmittance can be adjusted in inverse proportion to the brightness of the light defective area. A detailed description thereof has been given above with reference to FIGS. 8 and 9.

์ƒ๊ธฐํ•œ ๋‹จ๊ณ„(S11~S14)๋ฅผ ๋ชจ๋‘ ๋งˆ์น˜๋ฉด, ์ด๋ฏธ์ง€์„ผ์„œ(220)์— ์˜ํ•ด ์˜์ƒ์„ ์žฌ์ฐจ ํš๋“ํ•  ์ˆ˜ ์žˆ๊ณ , ๊ทธ ์ „์— LCD(111)์— ์˜ํ•ด ๊ด‘ํˆฌ๊ณผ์œจ์ด ๋ฏธ๋ฆฌ ๋ณด์ •๋จ์œผ๋กœ์จ ๊ด‘ํฌํ™”๋‚˜ ๊ด‘๋ถ€์กฑ ๋“ฑ๊ณผ ๊ฐ™์€ ์ƒํ™ฉ์—์„œ๋„ ์„ ๋ช…ํ•˜๋ฉด์„œ๋„ ์ƒ‰์žฌํ˜„์„ฑ์ด ๋›ฐ์–ด๋‚œ ์˜์ƒ์„ ์–ป์„ ์ˆ˜ ์žˆ๋‹ค. After completing the above steps (S11 to S14), the image can be obtained again by the image sensor 220, before the light transmittance is corrected by the LCD 111 in advance, even in situations such as light saturation or light shortage At the same time, it is possible to obtain images with excellent color reproduction.

๋ณธ ๋ฐœ๋ช…์˜ ์ผ ์‹ค์‹œ๋ก€์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์€, ์ผ๋ก€๋กœ ์‚ฌ์šฉ์ž์˜ ์กฐ์ž‘์ด๋‚˜ ์ •ํ•ด์ง„ ํ”„๋กœ์„ธ์Šค์— ๋”ฐ๋ผ, ํ™”์งˆ ๊ฐœ์„  ๊ณผ์ •์„ ์ˆ˜ํ–‰ํ•˜๋„๋ก ํ•˜๋Š” ์‹ ํ˜ธ๋ฅผ ์ˆ˜์‹ ๋ฐ›์•„ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ์˜ˆ์ปจ๋Œ€ ์ดฌ์˜์˜ ์‚ฌ์ „ ์ ˆ์ฐจ๋กœ์„œ, ์˜คํ†  ํฌ์ปค์‹ฑ๊ณผ ๋™์‹œ ๋˜๋Š” ์˜คํ†  ํฌ์ปค์‹ฑ ์ดํ›„์˜ ์ ˆ์ฐจ๋กœ์„œ ์ˆ˜ํ–‰๋  ์ˆ˜ ์žˆ๊ณ , ๋‹ค๋ฅธ ์˜ˆ๋กœ์„œ, ์‚ฌ์šฉ์ž์˜ ์กฐ์ž‘์ด๋‚˜ ์ •ํ•ด์ง„ ํ”„๋กœ์„ธ์Šค์— ๋”ฐ๋ผ, ์ดฌ์˜ ๊ณผ์ •์„ ์ˆ˜ํ–‰ํ•˜๋„๋ก ํ•˜๋Š” ์‹ ํ˜ธ๋ฅผ ์ˆ˜์‹ ๋ฐ›์•„ ์ดฌ์˜ ์ „์— ์ž๋™์œผ๋กœ ์ˆ˜ํ–‰๋  ์ˆ˜๋„ ์žˆ๋‹ค. The image quality improving method according to an embodiment of the present invention may be performed by receiving a signal for performing an image quality improving process according to, for example, a user's operation or a predetermined process. For example, as an advance procedure of shooting, It may be performed as a procedure after simultaneous or auto focusing. As another example, a signal for performing a photographing process may be received and automatically performed before photographing according to a user's manipulation or a predetermined process.

์ด์™€ ๊ฐ™์€ ๋ณธ ๋ฐœ๋ช…์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜, ์ด๋ฅผ ๊ฐ€์ง€๋Š” ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜ ๋ฐ ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์— ๋”ฐ๋ฅด๋ฉด, ํ•˜๋‚˜์˜ ํ™”๋ฉด ๋‚ด์—์„œ ์˜์—ญ๋ณ„ ๊ด‘ํฌํ™” ๋˜๋Š” ๊ด‘๋ถ€์กฑ์œผ๋กœ ์ธํ•ด ๊ณผ๋„ํ•œ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์กด์žฌํ•  ๊ฒฝ์šฐ, ์นด๋ฉ”๋ผ๋ Œ์ฆˆ์™€ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋œ ZRF(Zone collected Reduction Filter)์— ์˜ํ•ด ๋ถ€๋ถ„๋ณ„ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•จ์œผ๋กœ์จ ์„ ๋ช…๋„์™€ ์ƒ‰์žฌํ˜„์„ฑ์ด ์šฐ์ˆ˜ํ•œ ์˜์ƒ์„ ํš๋“ํ•  ์ˆ˜ ์žˆ๋‹ค. According to the image quality improving apparatus, the digital photographing apparatus having the same, and the image quality improving method according to the present invention, if there is an excessive brightness difference due to light saturation or light deficiency for each region in one screen, it is installed between the camera lens and the image sensor. By using the ZRF (Zone collected Reduction Filter) to adjust the light transmittance for each part, it is possible to obtain an image with excellent clarity and color reproducibility.

์ด์™€ ๊ฐ™์ด ์ฒจ๋ถ€๋œ ๋„๋ฉด์„ ์ฐธ์กฐํ•˜์—ฌ ๋ณธ ๋ฐœ๋ช…์„ ์„ค๋ช…ํ•˜์˜€์œผ๋‚˜, ๋ณธ ๋ฐœ๋ช…์˜ ๊ธฐ์ˆ ์  ์‚ฌ์ƒ์„ ๋ฒ—์–ด๋‚˜์ง€ ์•Š๋Š” ๋ฒ”์œ„ ๋‚ด์—์„œ ๋‹ค์–‘ํ•œ ์ˆ˜์ • ๋ฐ ๋ณ€ํ˜•์ด ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ์Œ์€ ๋ฌผ๋ก ์ด๋‹ค. ๊ทธ๋Ÿฌ๋ฏ€๋กœ, ๋ณธ ๋ฐœ๋ช…์˜ ๋ฒ”์œ„๋Š” ์„ค๋ช…๋œ ์‹ค์‹œ๋ก€์— ํ•œ์ •๋˜์–ด์„œ๋Š” ์•„๋‹ˆ๋˜๋ฉฐ, ํ›„์ˆ ํ•˜๋Š” ํŠนํ—ˆ์ฒญ๊ตฌ๋ฒ”์œ„๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์ด๋Ÿฌํ•œ ํŠนํ—ˆ์ฒญ๊ตฌ๋ฒ”์œ„์™€ ๊ท ๋“ฑํ•œ ๊ฒƒ๋“ค์— ์˜ํ•ด ์ •ํ•ด์ ธ์•ผ ํ•œ๋‹ค.As described above, the present invention has been described with reference to the accompanying drawings, but various modifications and changes can be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

๋ณธ ๋ฐœ๋ช…์˜ ์ผ์ธก๋ฉด์— ๋”ฐ๋ฅด๋ฉด, ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋˜์–ด ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›์„ ํ†ต๊ณผํ•œ ๊ด‘์„ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์กฐ์‚ฌํ•˜๋„๋ก ํˆฌ๊ณผ์‹œํ‚ค๊ณ , ํ”ฝ์…€๋ฐฉ์‹์œผ๋กœ ๊ตฌ์„ฑ๋˜๋ฉฐ, ์•กํ‹ฐ๋ธŒ ์–ด๋ ˆ์ด(active array)๋ฅผ ๋‘์–ด ๋‹จ์œ„ ์…€ ๊ตฌ๋™์— ์˜ํ•ด, ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ๋งˆ๋‹ค ๊ด‘ํˆฌ๊ณผ์œจ์ด ์กฐ์ ˆ๋˜๋Š” LCD(Liquid Crystal Display)๋ฅผ ๊ฐ€์ง€๋Š” ZRF(Zone collected Reduction Filter); ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๋Š” ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€; ๋ฐ ์ƒ๊ธฐ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ LCD์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋Š” ZRF์ œ์–ด๋ถ€;๋ฅผ ํฌํ•จํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜๊ฐ€ ์ œ๊ณต๋œ๋‹ค.According to an aspect of the present invention, the light is installed between the lens unit and the image sensor and transmits the light passing through the lens unit to irradiate the image sensor, is configured in a pixel manner, the unit cell by placing an active array (active array) Zone collected Reduction Filter (ZRF) having an LCD (Liquid Crystal Display) in which light transmittance is adjusted for each area partitioned by driving; An image processor which processes an image acquired by the image sensor as data; And a ZRF controller configured to calculate brightness of a plurality of divided regions of the image from the data processed by the image processor, and to control light transmittance of the region of the LCD to reduce the brightness difference between the regions in the image. An image quality improving device is provided.

์ƒ๊ธฐ ZRF๋Š”, ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋˜๋Š” IR ์ปท ํ•„ํ„ฐ์™€ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์—์„œ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์ธก์œผ๋กœ ์น˜์šฐ์น˜๋„๋ก ์„ค์น˜๋  ์ˆ˜ ์žˆ๋‹ค.The ZRF may be installed to be biased toward the image sensor between the IR cut filter installed between the lens unit and the image sensor and the image sensor.

์ƒ๊ธฐ ZRF๋Š”, ์ƒ๊ธฐ LCD์˜ ์–‘์ธก๋ฉด์— ๊ธ€๋ž˜์Šค๊ฐ€ ๊ฐ๊ฐ ๋ถ€์ฐฉ๋˜๊ณ , ์ƒ๊ธฐ ๊ธ€๋ž˜์Šค ๊ฐ๊ฐ์˜ ๋…ธ์ถœ๋ฉด์— ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๊ด‘์„ ๊ฐ๊ฐ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์ด ๋ถ€์ฐฉ๋˜๋ฉฐ, ๋…ธ๋ฉ€๋ฆฌ ํ™”์ดํŠธ(nomally white)๋กœ ๊ตฌ์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ZRF์ œ์–ด๋ถ€๋Š”, ์ƒ๊ธฐ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์ •์ƒ ๋ฒ”์œ„ ๋‚ด์ธ ๊ฒฝ์šฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ตœ์†Œ ๋‹จ๊ณ„๋กœ ํ•˜๊ฑฐ๋‚˜, ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ˆ˜ํ–‰ํ•˜์ง€ ์•Š๋„๋ก ํ•  ์ˆ˜ ์žˆ๋‹ค.The ZRF includes glass attached to both sides of the LCD, and first and second polarizing plates for polarizing light in a direction orthogonal to each other on the exposed surfaces of the glass, respectively, and are normally white. And the ZRF controller is configured to minimize the control of the light transmittance of the area of the LCD when the brightness difference of a plurality of areas divided in the image from the data processed by the image processor is within a normal range, It is possible to avoid performing control of the transmittance.

์ƒ๊ธฐ LCD๋Š”, ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์—์„œ ๋‹ค์ˆ˜์˜ ํ”ฝ์…€์„ ํ•˜๋‚˜์˜ ๋‹จ์œ„๋กœ์„œ ๋Œ€์‘ํ•˜๋Š” ์˜์—ญ์„ ๊ฐ€์งˆ ์ˆ˜ ์žˆ๋‹ค.The LCD may have an area corresponding to a plurality of pixels as one unit in the image sensor.

์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€, ํŽธ๊ด‘์˜์—ญ์ด ์ผ๋ฐฉํ–ฅ์œผ๋กœ ๊ท ๋“ฑ ๋˜๋Š” ๋ถˆ๊ท ๋“ฑํ•˜๊ฒŒ ๋ถˆ์—ฐ์†์ ์œผ๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ํŽธ๊ด‘์˜์—ญ์˜ ๋ถˆ์—ฐ์†์ ์ธ ๋ฐฐ์—ด์ด ๋‚˜๋ž€ํ•˜๊ฒŒ ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋  ์ˆ˜ ์žˆ๋‹ค.In the first and second polarizing plates, polarization regions may be uniformly or unevenly discontinuously formed in one direction, and a plurality of discontinuous arrangements of the polarization regions may be formed side by side.

์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€, ์™€์ด์–ด ๊ทธ๋ฆฌ๋“œ ํŽธ๊ด‘ํŒ(wire grid polarizer)์œผ๋กœ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๋‹ค.The first and second polarizers may be formed of a wire grid polarizer.

์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€, ๊ด‘ํˆฌ๊ณผ์„ฑ ์žฌ์งˆ์˜ ๊ธฐํŒ ์ƒ์— ๊ด‘ํˆฌ๊ณผ์„ฑ์˜ ์œ ์ „์ฒด๋‚˜ ํด๋ฆฌ๋จธ๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ์š”์ฒ ๋ถ€๊ฐ€ ์ผ๋ฐฉํ–ฅ์œผ๋กœ ์š”์ฒ  ํ˜•์ƒ์œผ๋กœ ํŒจํ„ฐ๋‹๋˜์–ด ๋‚˜๋ž€ํ•˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ์š”์ฒ ๋ถ€์˜ ํ™ˆ ๋‚ด์ธก๋งˆ๋‹ค ๋™์ผํ•œ ๋ฐฉํ–ฅ์œผ๋กœ ๊ฒฝ์‚ฌ์ง€๊ฒŒ ๋ฐฑ์ƒ‰๊ธˆ์†์ด ์ฆ์ฐฉ๋  ์ˆ˜ ์žˆ๋‹ค.The first and second polarizing plates are formed on the substrate of the light transmissive material so that the uneven parts made of a light-transmissive dielectric material or polymer are patterned in the uneven shape in one direction and side by side, and are inclined in the same direction for each inside of the grooves of the uneven parts. White metal can be deposited.

์ƒ๊ธฐ ZRF์ œ์–ด๋ถ€๋Š”, ์ƒ๊ธฐ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค.The ZRF controller extracts a light failure region as a region that deviates from a predetermined brightness difference from the overall brightness among the regions of the image, and extracts a correction region as a region that contributes to the formation of the light failure region among the regions of the image sensor. And extracting, as an adjusting region, a region that transmits light irradiated to the correction region from the area of the LCD, and adjusting the light transmittance of the adjusting region to be inversely proportional to the brightness of the light defective region.

๋ณธ ๋ฐœ๋ช…์˜ ๋‹ค๋ฅธ ์ธก๋ฉด์— ๋”ฐ๋ฅด๋ฉด, ๊ด‘์ด ์ž…์‚ฌ๋˜๋Š” ๋ Œ์ฆˆ์œ ๋‹›; ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›์˜ ํ›„๋ฐฉ์— ์„ค์น˜๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ; ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฉ”๋ชจ๋ฆฌ๋ถ€์— ์ €์žฅ๋˜๋„๋ก ์ œ์–ดํ•˜๋Š” ๋ฉ”์ธ์ œ์–ด๋ถ€; ๋ฐ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋„๋ก ์„ค์น˜๋˜๋Š” ํ™”์งˆ๊ฐœ์„ ๋ถ€๋ฅผ ํฌํ•จํ•˜๊ณ , ์ƒ๊ธฐ ํ™”์งˆ๊ฐœ์„ ๋ถ€๋Š”, ๋ณธ ๋ฐœ๋ช…์˜ ์ผ์ธก๋ฉด์— ๋”ฐ๋ฅธ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜์ธ, ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜๊ฐ€ ์ œ๊ณต๋œ๋‹ค.According to another aspect of the invention, the lens unit is incident light; An image sensor installed at the rear of the lens unit; A main control unit controlling the image acquired by the image sensor to be stored in a memory unit; And an image quality improvement unit installed to control the light transmittance irradiated to the image sensor so as to reduce the brightness difference between the regions in the image acquired by the image sensor. The image quality improvement unit may further improve image quality according to an aspect of the present invention. A digital photographing apparatus, which is an apparatus, is provided.

์ƒ๊ธฐ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜๋Š”, ํœด๋Œ€์šฉ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ, CCTV์šฉ ์นด๋ฉ”๋ผ, ํœด๋Œ€์šฉ ์ „์ž๊ธฐ๊ธฐ์˜ ์นด๋ฉ”๋ผ, ์›น ์นด๋ฉ”๋ผ, ๋น„์ ผ๊ฒ€์‚ฌ๊ธฐ์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ, ๋ธ”๋ž™๋ฐ•์Šค์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ ์ค‘ ์–ด๋Š ํ•˜๋‚˜์ผ ์ˆ˜ ์žˆ๋‹ค.The digital photographing apparatus may be any one of a portable digital camera, a CCTV camera, a camera of a portable electronic device, a web camera, a camera module of a vision inspector, and a camera module of a black box.

๋ณธ ๋ฐœ๋ช…์˜ ๋˜ ๋‹ค๋ฅธ ์ธก๋ฉด์— ๋”ฐ๋ฅด๋ฉด, ๊ด‘์ด ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ZRF(Zone collected Reduction Filter)๋ฅผ ํ†ต๊ณผํ•˜์—ฌ ์กฐ์‚ฌ๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ๋กœ๋ถ€ํ„ฐ ์˜์ƒ์„ ํš๋“ํ•˜๋Š” ๋‹จ๊ณ„; ์ƒ๊ธฐ ์˜์ƒ์„ ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๋Š” ๋‹จ๊ณ„; ์ƒ๊ธฐ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๋Š” ๋‹จ๊ณ„; ๋ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ ZRF์˜ LCD์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋Š” ๋‹จ๊ณ„;๋ฅผ ํฌํ•จํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•์ด ์ œ๊ณต๋œ๋‹ค.According to another aspect of the invention, the step of obtaining an image from the image sensor irradiated with light passing through the lens unit and Zone collected Reduction Filter (ZRF); Processing the image into data; Calculating brightness of a plurality of divided regions of the image from the data; And controlling light transmittance for a plurality of divided regions in the LCD of the ZRF so as to reduce the brightness difference between the regions in the image.

์ƒ๊ธฐ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•˜๋Š” ๋‹จ๊ณ„๋Š”, ์ƒ๊ธฐ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•  ์ˆ˜ ์žˆ๋‹ค.The adjusting of the light transmittance may include extracting a light defective area as an area deviating from a predetermined brightness difference from the overall brightness among the areas of the image, and correcting it as an area contributing to the formation of the light defective area from the area of the image sensor. An area may be extracted, and an area for transmitting light irradiated to the correction area among the areas of the LCD may be extracted as an adjustment area, and the light transmittance of the adjustment area may be adjusted in inverse proportion to the brightness of the light defective area.

๋ณธ ๋ฐœ๋ช…์€ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜์— ์‚ฐ์—…์ƒ ์ด์šฉ๊ฐ€๋Šฅํ•˜๋‹ค. Industrial Applicability The present invention is industrially applicable to digital photographing apparatus.

110 : ZRF 111 : LCD110: ZRF 111: LCD

111a,111b : ์˜์—ญ 112,113 : ๊ธ€๋ž˜์Šค111a, 111b: Area 112,113: Glass

114,116 : ์ œ 1 ํŽธ๊ด‘ํŒ 114a : ํŽธ๊ด‘์˜์—ญ114,116 first polarizing plate 114a: polarization region

115,117 : ์ œ 2 ํŽธ๊ด‘ํŒ 115a : ํŽธ๊ด‘์˜์—ญ115,117: second polarizing plate 115a: polarization region

116a,117a : ์š”์ฒ ๋ถ€ 116b,117b : ๋ฐฑ์ƒ‰๊ธˆ์†116a, 117a: uneven portion 116b, 117b: white metal

116c,117c : ๊ธฐํŒ 120 : ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€116c and 117c substrate 120 image processor

130 : ZRF์ œ์–ด๋ถ€ 210 : ๋ Œ์ฆˆ์œ ๋‹›130: ZRF controller 210: lens unit

220 : ์ด๋ฏธ์ง€์„ผ์„œ 221,222 : ์˜์—ญ220: image sensor 221,222: area

230 : IR ์ปท ํ•„ํ„ฐ 240 : ๋ฉ”์ธ์ œ์–ด๋ถ€230: IR cut filter 240: main control unit

250 : ๋ฉ”๋ชจ๋ฆฌ๋ถ€250: memory

Claims (16)

๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋˜์–ด ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›์„ ํ†ต๊ณผํ•œ ๊ด‘์„ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์กฐ์‚ฌํ•˜๋„๋ก ํˆฌ๊ณผ์‹œํ‚ค๊ณ , ํ”ฝ์…€๋ฐฉ์‹์œผ๋กœ ๊ตฌ์„ฑ๋˜๋ฉฐ, ์•กํ‹ฐ๋ธŒ ์–ด๋ ˆ์ด(active array)๋ฅผ ๋‘์–ด ๋‹จ์œ„ ์…€ ๊ตฌ๋™์— ์˜ํ•ด, ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ๋งˆ๋‹ค ๊ด‘ํˆฌ๊ณผ์œจ์ด ์กฐ์ ˆ๋˜๋Š” LCD(Liquid Crystal Display)๋ฅผ ๊ฐ€์ง€๋Š” ZRF(Zone collected Reduction Filter);It is installed between the lens unit and the image sensor and transmits the light passing through the lens unit to the image sensor to be irradiated, and is configured in a pixel manner, and is divided into a plurality of units by driving the unit cell by placing an active array (active array) Zone collected Reduction Filter (ZRF) having a liquid crystal display (LCD) in which light transmittance is controlled for each region; ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๋Š” ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€; ๋ฐAn image processor which processes an image acquired by the image sensor as data; And ์ƒ๊ธฐ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ LCD์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋Š” ZRF์ œ์–ด๋ถ€;A ZRF controller configured to calculate brightness of a plurality of divided regions of the image from data processed by the image processor, and to control light transmittance of the region of the LCD to reduce the brightness difference between the regions in the image; ๋ฅผ ํฌํ•จํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.Including, the image quality improving device. ์ฒญ๊ตฌํ•ญ 1์— ์žˆ์–ด์„œ, The method according to claim 1, ์ƒ๊ธฐ ZRF๋Š”,The ZRF is, ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์— ์„ค์น˜๋˜๋Š” IR ์ปท ํ•„ํ„ฐ์™€ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ ์‚ฌ์ด์—์„œ ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์ธก์œผ๋กœ ์น˜์šฐ์น˜๋„๋ก ์„ค์น˜๋˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.And an IR cut filter installed between the lens unit and the image sensor and installed to be biased toward the image sensor side between the image sensor. ์ฒญ๊ตฌํ•ญ 1์— ์žˆ์–ด์„œ,The method according to claim 1, ์ƒ๊ธฐ ZRF๋Š”,The ZRF is, ์ƒ๊ธฐ LCD์˜ ์–‘์ธก๋ฉด์— ๊ธ€๋ž˜์Šค๊ฐ€ ๊ฐ๊ฐ ๋ถ€์ฐฉ๋˜๊ณ , ์ƒ๊ธฐ ๊ธ€๋ž˜์Šค ๊ฐ๊ฐ์˜ ๋…ธ์ถœ๋ฉด์— ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๊ด‘์„ ๊ฐ๊ฐ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์ด ๋ถ€์ฐฉ๋˜๋ฉฐ, ๋…ธ๋ฉ€๋ฆฌ ํ™”์ดํŠธ(nomally white)๋กœ ๊ตฌ์„ฑ๋˜๊ณ , Glass is attached to both sides of the LCD, the first and second polarizing plates for polarizing the light in the direction orthogonal to each other on each of the exposure surface of the glass is attached, and is composed of a normally white (nomally white), ์ƒ๊ธฐ ZRF์ œ์–ด๋ถ€๋Š”,The ZRF control unit, ์ƒ๊ธฐ ์˜์ƒ์ฒ˜๋ฆฌ๋ถ€์— ์˜ํ•ด ์ฒ˜๋ฆฌ๋œ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ์ฐจ๊ฐ€ ์ •์ƒ ๋ฒ”์œ„ ๋‚ด์ธ ๊ฒฝ์šฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ตœ์†Œ ๋‹จ๊ณ„๋กœ ํ•˜๊ฑฐ๋‚˜, ๊ด‘ํˆฌ๊ณผ์œจ์˜ ์ œ์–ด๋ฅผ ์ˆ˜ํ–‰ํ•˜์ง€ ์•Š๋„๋ก ํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.When the brightness difference of the area divided into a plurality of areas in the image from the data processed by the image processing unit is within a normal range, the control of the light transmittance of the area of the LCD is minimized or the control of the light transmittance is not performed. , Picture quality improvement device. ์ฒญ๊ตฌํ•ญ 1์— ์žˆ์–ด์„œ,The method according to claim 1, ์ƒ๊ธฐ LCD๋Š”,The LCD, ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์—์„œ ๋‹ค์ˆ˜์˜ ํ”ฝ์…€์„ ํ•˜๋‚˜์˜ ๋‹จ์œ„๋กœ์„œ ๋Œ€์‘ํ•˜๋Š” ์˜์—ญ์„ ๊ฐ€์ง€๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.And an area corresponding to a plurality of pixels as one unit in the image sensor. ์ฒญ๊ตฌํ•ญ 3์— ์žˆ์–ด์„œ,The method according to claim 3, ์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€,The first and second polarizing plate, ํŽธ๊ด‘์˜์—ญ์ด ์ผ๋ฐฉํ–ฅ์œผ๋กœ ๊ท ๋“ฑ ๋˜๋Š” ๋ถˆ๊ท ๋“ฑํ•˜๊ฒŒ ๋ถˆ์—ฐ์†์ ์œผ๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ํŽธ๊ด‘์˜์—ญ์˜ ๋ถˆ์—ฐ์†์ ์ธ ๋ฐฐ์—ด์ด ๋‚˜๋ž€ํ•˜๊ฒŒ ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.The polarization region is uniformly or unevenly discontinuously formed in one direction, a plurality of discontinuous arrangement of the polarization region is formed in parallel, the image quality improving apparatus. ์ฒญ๊ตฌํ•ญ 3์— ์žˆ์–ด์„œ,The method according to claim 3, ์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€,The first and second polarizing plate, ์™€์ด์–ด ๊ทธ๋ฆฌ๋“œ ํŽธ๊ด‘ํŒ(wire grid polarizer)์œผ๋กœ ์ด๋ฃจ์–ด์ง€๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.An image quality improving device comprising a wire grid polarizer. ์ฒญ๊ตฌํ•ญ 6์— ์žˆ์–ด์„œ,The method according to claim 6, ์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€,The first and second polarizing plate, ๊ด‘ํˆฌ๊ณผ์„ฑ ์žฌ์งˆ์˜ ๊ธฐํŒ ์ƒ์— ๊ด‘ํˆฌ๊ณผ์„ฑ์˜ ์œ ์ „์ฒด๋‚˜ ํด๋ฆฌ๋จธ๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ์š”์ฒ ๋ถ€๊ฐ€ ์ผ๋ฐฉํ–ฅ์œผ๋กœ ์š”์ฒ  ํ˜•์ƒ์œผ๋กœ ํŒจํ„ฐ๋‹๋˜์–ด ๋‚˜๋ž€ํ•˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ์š”์ฒ ๋ถ€์˜ ํ™ˆ ๋‚ด์ธก๋งˆ๋‹ค ๋™์ผํ•œ ๋ฐฉํ–ฅ์œผ๋กœ ๊ฒฝ์‚ฌ์ง€๊ฒŒ ๋ฐฑ์ƒ‰๊ธˆ์†์ด ์ฆ์ฐฉ๋˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.The image quality improvement apparatus in which the uneven parts which consist of an optically transparent dielectric or a polymer are patterned in the uneven | corrugated shape in one direction, and are formed side by side on the board | substrate of a transparent material, and the white metal is inclined in the same direction for every groove inside of the uneven part. . ์ฒญ๊ตฌํ•ญ 1์— ์žˆ์–ด์„œ,The method according to claim 1, ์ƒ๊ธฐ ZRF์ œ์–ด๋ถ€๋Š”,The ZRF control unit, ์ƒ๊ธฐ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜.The light defective area is extracted from the area of the image deviating from the predetermined brightness difference compared to the overall brightness, the correction area is extracted from the area of the image sensor as the area contributing to the formation of the light bad area, and the area of the LCD. And extracting an area for transmitting light irradiated to the correction area as an adjustment area, and adjusting the light transmittance of the adjustment area to be inversely proportional to the brightness of the light defective area. ๊ด‘์ด ์ž…์‚ฌ๋˜๋Š” ๋ Œ์ฆˆ์œ ๋‹›;A lens unit to which light is incident; ์ƒ๊ธฐ ๋ Œ์ฆˆ์œ ๋‹›์˜ ํ›„๋ฐฉ์— ์„ค์น˜๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ;An image sensor installed at the rear of the lens unit; ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์„ ๋ฉ”๋ชจ๋ฆฌ๋ถ€์— ์ €์žฅ๋˜๋„๋ก ์ œ์–ดํ•˜๋Š” ๋ฉ”์ธ์ œ์–ด๋ถ€; ๋ฐ A main control unit controlling the image acquired by the image sensor to be stored in a memory unit; And ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์˜ํ•ด ํš๋“๋˜๋Š” ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋„๋ก ์„ค์น˜๋˜๋Š” ํ™”์งˆ๊ฐœ์„ ๋ถ€๋ฅผ ํฌํ•จํ•˜๊ณ ,And an image quality improving unit installed to control the light transmittance irradiated to the image sensor so as to reduce the brightness difference between the regions in the image obtained by the image sensor. ์ƒ๊ธฐ ํ™”์งˆ๊ฐœ์„ ๋ถ€๋Š”,The image quality improvement unit, ์ฒญ๊ตฌํ•ญ 1 ๋‚ด์ง€ ์ฒญ๊ตฌํ•ญ 8 ์ค‘ ์–ด๋Š ํ•œ ํ•ญ์— ๊ธฐ์žฌ๋œ ํ™”์งˆ ๊ฐœ์„  ์žฅ์น˜์ธ, ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜.The digital photographing apparatus which is the image quality improving apparatus in any one of Claims 1-8. ์ฒญ๊ตฌํ•ญ 9์— ์žˆ์–ด์„œ,The method according to claim 9, ์ƒ๊ธฐ ๋””์ง€ํ„ธ ์ดฌ์˜์žฅ์น˜๋Š”,The digital photographing apparatus, ํœด๋Œ€์šฉ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ, CCTV์šฉ ์นด๋ฉ”๋ผ, ํœด๋Œ€์šฉ ์ „์ž๊ธฐ๊ธฐ์˜ ์นด๋ฉ”๋ผ, ์›น ์นด๋ฉ”๋ผ, ๋น„์ ผ๊ฒ€์‚ฌ๊ธฐ์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ, ๋ธ”๋ž™๋ฐ•์Šค์˜ ์นด๋ฉ”๋ผ๋ชจ๋“ˆ ์ค‘ ์–ด๋Š ํ•˜๋‚˜์ธ, ๋””์ง€ํ„ธ ์ดฌ์˜ ์žฅ์น˜. Portable digital cameras, CCTV cameras, cameras of portable electronic devices, web cameras, camera module of vision inspection, camera module of the black box, digital shooting device. ๊ด‘์ด ๋ Œ์ฆˆ์œ ๋‹›๊ณผ ZRF(Zone collected Reduction Filter)๋ฅผ ํ†ต๊ณผํ•˜์—ฌ ์กฐ์‚ฌ๋˜๋Š” ์ด๋ฏธ์ง€์„ผ์„œ๋กœ๋ถ€ํ„ฐ ์˜์ƒ์„ ํš๋“ํ•˜๋Š” ๋‹จ๊ณ„;Acquiring an image from an image sensor in which light is irradiated through the lens unit and the zone collected reduction filter (ZRF); ์ƒ๊ธฐ ์˜์ƒ์„ ๋ฐ์ดํ„ฐ๋กœ ์ฒ˜๋ฆฌํ•˜๋Š” ๋‹จ๊ณ„;Processing the image into data; ์ƒ๊ธฐ ๋ฐ์ดํ„ฐ๋กœ๋ถ€ํ„ฐ ์ƒ๊ธฐ ์˜์ƒ์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋œ ์˜์—ญ์˜ ๋ฐ๊ธฐ๋ฅผ ์‚ฐ์ถœํ•˜๋Š” ๋‹จ๊ณ„; ๋ฐCalculating brightness of a plurality of divided regions of the image from the data; And ์ƒ๊ธฐ ์˜์ƒ์—์„œ ์˜์—ญ๊ฐ„์˜ ๋ฐ๊ธฐ์ฐจ๋ฅผ ์ค„์ด๋„๋ก ์ƒ๊ธฐ ZRF์˜ LCD์—์„œ ๋‹ค์ˆ˜๋กœ ๊ตฌํš๋˜๋Š” ์˜์—ญ์— ๋Œ€ํ•œ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ œ์–ดํ•˜๋Š” ๋‹จ๊ณ„;Controlling light transmittance for a plurality of divided regions in the LCD of the ZRF to reduce the difference in brightness between the regions in the image; ๋ฅผ ํฌํ•จํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•.Including, the image quality improving method. ์ฒญ๊ตฌํ•ญ 11์— ์žˆ์–ด์„œ,The method according to claim 11, ์ƒ๊ธฐ ZRF๋Š”,The ZRF is, ์ƒ๊ธฐ LCD์˜ ์–‘์ธก๋ฉด์— ๊ธ€๋ž˜์Šค๊ฐ€ ๋ถ€์ฐฉ๋˜๊ณ , ์ƒ๊ธฐ ๊ธ€๋ž˜์Šค์˜ ๋…ธ์ถœ๋ฉด ๊ฐ๊ฐ์— ์„œ๋กœ ์ง๊ตํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๊ด‘์„ ๊ฐ๊ฐ ํŽธ๊ด‘์‹œํ‚ค๋Š” ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์ด ๋ถ€์ฐฉ๋˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•.Glass is attached to both sides of the LCD, and the first and second polarizing plates for polarizing the light in the direction orthogonal to each other on each of the exposed surface of the glass, the image quality improving method. ์ฒญ๊ตฌํ•ญ 12์— ์žˆ์–ด์„œ,The method according to claim 12, ์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€,The first and second polarizing plate, ํŽธ๊ด‘์˜์—ญ์ด ์ผ๋ฐฉํ–ฅ์œผ๋กœ ๊ท ๋“ฑ ๋˜๋Š” ๋ถˆ๊ท ๋“ฑํ•˜๊ฒŒ ๋ถˆ์—ฐ์†์ ์œผ๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ํŽธ๊ด‘์˜์—ญ์˜ ๋ถˆ์—ฐ์†์ ์ธ ๋ฐฐ์—ด์ด ๋‚˜๋ž€ํ•˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•.And a plurality of polarization regions are uniformly or unevenly discontinuously formed in one direction, and a plurality of polarization regions are formed so as to have a discontinuous arrangement of the polarization regions in parallel. ์ฒญ๊ตฌํ•ญ 12์— ์žˆ์–ด์„œ,The method according to claim 12, ์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€,The first and second polarizing plate, ์™€์ด์–ด ๊ทธ๋ฆฌ๋“œ ํŽธ๊ด‘ํŒ(wire grid polarizer)๋กœ ์ด๋ฃจ์–ด์ง€๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•.The image quality improvement method which consists of a wire grid polarizer. ์ฒญ๊ตฌํ•ญ 14์— ์žˆ์–ด์„œ,The method according to claim 14, ์ƒ๊ธฐ ์ œ 1 ๋ฐ ์ œ 2 ํŽธ๊ด‘ํŒ์€,The first and second polarizing plate, ๊ด‘ํˆฌ๊ณผ์„ฑ ์žฌ์งˆ์˜ ๊ธฐํŒ ์ƒ์— ๊ด‘ํˆฌ๊ณผ์„ฑ์˜ ์œ ์ „์ฒด๋‚˜ ํด๋ฆฌ๋จธ๋กœ ์ด๋ฃจ์–ด์ง€๋Š” ์š”์ฒ ๋ถ€๊ฐ€ ์ผ๋ฐฉํ–ฅ์œผ๋กœ ์š”์ฒ  ํ˜•์ƒ์œผ๋กœ ํŒจํ„ฐ๋‹๋˜์–ด ๋‚˜๋ž€ํ•˜๋„๋ก ๋‹ค์ˆ˜๋กœ ํ˜•์„ฑ๋˜๊ณ , ์ƒ๊ธฐ ์š”์ฒ ๋ถ€์˜ ํ™ˆ ๋‚ด์ธก๋งˆ๋‹ค ๋™์ผํ•œ ๋ฐฉํ–ฅ์œผ๋กœ ๊ฒฝ์‚ฌ์ง€๊ฒŒ ๋ฐฑ์ƒ‰๊ธˆ์†์ด ์ฆ์ฐฉ๋˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•.A method of improving image quality in which a plurality of uneven parts made of a transparent dielectric or a polymer are patterned in parallel in an uneven shape in one direction on a substrate of a light transmissive material, and white metal is inclined in the same direction in each of the grooves of the uneven parts. . ์ฒญ๊ตฌํ•ญ 11์— ์žˆ์–ด์„œ,The method according to claim 11, ์ƒ๊ธฐ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์กฐ์ ˆํ•˜๋Š” ๋‹จ๊ณ„๋Š”,Adjusting the light transmittance, ์ƒ๊ธฐ ์˜์ƒ์˜ ์˜์—ญ ์ค‘์—์„œ ์ „์ฒด ๋ฐ๊ธฐ์— ๋น„ํ•˜์—ฌ ์ •ํ•ด์ง„ ๋ฐ๊ธฐ์ฐจ๋ฅผ ๋ฒ—์–ด๋‚˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์„ ์ถ”์ถœํ•˜๊ณ , ์ƒ๊ธฐ ์ด๋ฏธ์ง€์„ผ์„œ์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ํ˜•์„ฑ์— ๊ธฐ์—ฌํ•˜๋Š” ์˜์—ญ์œผ๋กœ์„œ ๋ณด์ •์˜์—ญ์„ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ LCD์˜ ์˜์—ญ ์ค‘์—์„œ ์ƒ๊ธฐ ๋ณด์ •์˜์—ญ์— ์กฐ์‚ฌ๋˜๋Š” ๊ด‘์„ ํˆฌ๊ณผ์‹œํ‚ค๋Š” ์˜์—ญ์„ ์กฐ์ ˆ์˜์—ญ์œผ๋กœ์„œ ์ถ”์ถœํ•˜๋ฉฐ, ์ƒ๊ธฐ ์กฐ์ ˆ์˜์—ญ์˜ ๊ด‘ํˆฌ๊ณผ์œจ์„ ์ƒ๊ธฐ ๊ด‘๋ถˆ๋Ÿ‰์˜์—ญ์˜ ๋ฐ๊ธฐ์— ๋ฐ˜๋น„๋ก€ํ•˜๋„๋ก ์กฐ์ ˆํ•˜๋Š”, ํ™”์งˆ ๊ฐœ์„  ๋ฐฉ๋ฒ•.The light defective area is extracted from the area of the image deviating from the predetermined brightness difference compared to the overall brightness, the correction area is extracted from the area of the image sensor as the area contributing to the formation of the light bad area, and the area of the LCD. Extracting a region for transmitting light irradiated to the correction region as an adjustment region, and adjusting the light transmittance of the adjustment region to be inversely proportional to the brightness of the light defective region.
PCT/KR2014/006631 2014-05-21 2014-07-22 Apparatus for improving image quality, digital photography apparatus having same, and method for improving image quality Ceased WO2015178534A1 (en)

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