KR20080105647A - Live screen display device and method during digital zoom - Google Patents

Abstract

The present invention relates to a digital image processing apparatus and an operation method thereof, and more particularly, to an apparatus and method for simultaneously displaying a digital zoomed live view screen and a live view screen before digital zoom. When the digital zoom signal is input, the live screen display device changes the size of a predetermined area of the original image to generate a first screen when the digital zoom signal is input, and simultaneously adjusts the size of the entire original image at the same time as the first screen is generated. And a screen output controller configured to display the second screen on the entire display and display the second screen on a predetermined area of the first screen.

Description

Apparatus and method for displaying liveview picture during digital zoom}

1 is a diagram illustrating a digital zoom processing screen in a general digital image processing apparatus.

2 is a perspective view showing the front and the top of the digital image processing apparatus.

FIG. 3 is a rear view illustrating a rear shape of the digital image processing apparatus of FIG. 2.

4 is a block diagram illustrating a configuration of a live screen display apparatus during digital zooming according to the present invention.

5 is a flowchart illustrating an operation of a live screen display method during digital zooming according to the present invention.

6 is a view showing an embodiment of displaying a live screen during digital zoom according to the present invention.

The present invention relates to a digital image processing apparatus and an operation method thereof, and more particularly, to an apparatus and method for simultaneously displaying a digital zoomed live view screen and a live view screen before digital zoom.

Digital zoom is to enlarge a picture by cutting out a part of the image when shooting. Since the value of the newly created pixel is interpolated using an existing image value, it is less delicate than an optical zoom. The image is shown. However, it does not have to use the optical lens, it looks like using an optical lens. Therefore, by implementing the digital zoom function in the image sensor, it is possible to make the sensor with the zoom function ultra light.

FIG. 1 is a diagram illustrating a digital zoom processing screen in a general digital image processing apparatus. FIG. 1A illustrates a live view screen in which digital zoom is not performed, and FIG. 1B illustrates a digital view in which a face portion of the live view screen of FIG. 1A is digitally zoomed. It is showing the screen.

As shown in FIG. 1, when performing a digital zoom in a conventional digital image processing apparatus, only a digital zoomed region is displayed as shown in FIG. 1B. In this case, although the portion shown on the display screen is enlarged, the display is enlarged. Since the parts are the same size, it is difficult to know which part of the entire subject the user wants to enlarge relatively, which causes inconvenience.

The present invention is to provide a live screen display device and method during digital zoom to simultaneously display a live view screen before the digital zoom and a live view screen digitally zoomed during digital zoom.

In accordance with one aspect of the present invention, there is provided a live screen display apparatus for digital zoom, comprising: a first screen generator configured to generate a first screen by changing a size of a predetermined region of an original image when a digital zoom signal is input; A second screen generator for generating a second screen by reducing the size of the entire original image to a predetermined size simultaneously with generating the first screen; And a screen output control unit which displays the first screen on the entire display unit and simultaneously displays the second screen in a predetermined area of the first screen.

In the present invention, the screen output controller is characterized in that to display where the first screen is located in the second screen.

According to an aspect of the present invention, there is provided a method of displaying a live screen during digital zoom in which (a) when a digital zoom signal is input to a displayed original image, a zoom image of which a predetermined area of the original image is changed is displayed. Simultaneously generating a reduced image in which the entire original image is reduced to a predetermined size; And (b) displaying the zoomed image on the entire display unit and simultaneously displaying the reduced image on a portion of the zoomed image.

In the present invention, it is characterized in that it is displayed where the zoomed image is located.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 is a perspective view showing the front and the top of the digital image processing apparatus.

The shutter release button 21 opens and closes to expose the CCD or film to light for a predetermined time, and records the image on the CCD by properly exposing the subject in conjunction with an aperture (not shown).

The shutter-release button 21 generates first and second image capturing signals by a photographer input. When the first shutter-release button 21 as the half-shutter signal is input, the digital image processing apparatus focuses and adjusts the amount of light, and when the focus is achieved, the green light is turned on in the display unit 33. . When focus is achieved by the input of the first shutter release button 21 and the amount of light is adjusted, the second shutter release button 21 as a full shutter signal is input to capture an image.

The power button 23 is input to supply power to and operate the digital image processing apparatus.

The flash 25 brightens the bright light instantly when shooting in a dark place. The flash mode includes auto flash, forced light emission, flash off, red eye reduction, and slow synchro.

The auxiliary light 27 supplies light to the subject so that the digital image processing apparatus automatically focuses quickly and accurately when the amount of light is insufficient or at night.

The lens unit 29 receives light from an external light source and processes an image.

FIG. 3 is a rear view illustrating a rear shape of the digital image processing apparatus illustrated in FIG. 2, wherein the wide-angle zoom button 31w, the telephoto-zoom button 31t, the display unit 33, and the touch sensor or the contact switch are connected. The provided input buttons B1 to B14 (hereinafter referred to as buttons B1 to B14) are provided.

The wide-angle zoom button 31w or the tele-zoom button 31t widens the angle of view or narrows the angle of view according to an input. In particular, it is input when the size of the selected exposure area is to be changed. When the wide-zoom button 31w is input, the size of the selected exposure area is reduced, and when the tele-zoom button 31t is input, the size of the selected exposure area is increased.

The buttons B1 to B14 are provided in horizontal and vertical columns of the display unit 33. The buttons B1 to B14 provided in the horizontal and vertical columns of the display unit 33 are provided with a touch sensor (not shown) or a contact switch (not shown).

That is, the buttons B1 to B14 are provided with a touch sensor to move up / down / left / right in a state where the buttons B1 to B7 in the horizontal row or the buttons B8 to B14 in the vertical row are touched. You can select any value (eg, color or brightness) from the items, or activate the submenu icons included in the main menu icon.

In addition, the button frame (B1 ~ B14) is provided with a contact switch, it is possible to directly select the main menu icon and sub-menu icon to execute the corresponding function. The touch sensor requires only a weak touch relative to the contact switch input, but the contact switch input requires a relatively strong touch compared to the touch sensor input.

4 is a block diagram showing the configuration of a live screen display apparatus during digital zooming according to the present invention, wherein the display unit 33, the user input unit 41, the imaging unit 43, the image processing unit 45, and the storage unit ( 47) and a controller 49. In the present invention, the controller 49 includes a first screen generator 49-1, a second screen generator 49-2, and a screen output controller 49-3.

The user input unit 41 may open and close the shutter release button 21 for exposing the CCD or film to light for a predetermined time, the power button 23 for supplying power, and widen the angle of view according to the input, or the angle of view. A wide-angle zoom button 31w and a tele-zoom button 31t for narrowing the width and a touch sensor or a contact switch provided in horizontal and vertical columns around the display 33 for character input according to the present invention. Button frames B1 to B14.

The imaging unit 43 includes a shutter, a lens unit, an aperture, a charge coupled device (CCD), and an ADC, which are not shown in the figure. The shutter is a mechanism for adjusting the amount of light exposed together with the aperture. The lens unit receives light from an external light source and processes an image. At this time, the iris adjusts the amount of light incident (light quantity) according to the degree of opening and closing. The opening and closing degree of the iris is controlled by the control unit 33.

The CCD accumulates the amount of light input through the lens unit and outputs an image captured by the lens unit in accordance with the accumulated light amount in accordance with the vertical synchronization signal. Image acquisition of the digital image processing apparatus is performed by a CCD that converts light reflected from a subject into an electrical signal. In order to obtain a color image using a CCD, a color filter is required, and most of them employ a filter (not shown) called a color filter array (CFA). CFA has a structure arranged regularly by passing only one color light per pixel, and has various shapes according to the arrangement structure. The ADC converts an analog video signal output from the CCD into a digital signal.

The image processor 45 performs signal processing to display the digitally converted RAW data. The image processor 45 removes the black level due to the dark current generated by the CCD and the CFA filter that is sensitive to the temperature change. The image processor 45 performs gamma correction for encoding information according to nonlinearity of human vision. The image processor 45 performs CFA interpolation to interpolate the Bayer pattern implemented by the RGRG line and the GBGB line of the gamma corrected predetermined data into the RGB line. The image processing unit 45 converts the interpolated RGB signal into a YUV signal and filters the Y signal by a high band filter to clearly process the image, and uses the standard color coordinate system to adjust the color values of the U and V signals. Perform color correction to correct and remove their noise. The image processor 45 compresses and signals the Y, U, and V signals from which the noise is removed to generate a JPEG file, and the generated JPEG file is displayed on the display unit 33 and stored in the storage unit 47. . All operations of the image processor 45 operate under the control of the controller 49.

In the present invention, the control unit 49, in particular, in order to simultaneously display the digital zoom screen and the live screen before the digital zoom at the time of digital zoom, the first screen generator 49-1, the second screen generator 49- 2) and a screen output controller 49-3.

When the telephoto-zoom button 31t is input as the digital zoom signal, the first screen generator 49-1 generates a first screen by changing a size of a predetermined region of the original image. For example, when the tele-zoom button 31t is input from the original image shown in FIG. 6A, the first screen as the digital zoom image shown in b-1 of FIG. 6B is generated.

At the same time, the second screen generating unit 49-2 reduces the size of the entire original image to a predetermined size to generate a second screen. For example, before the digital zoom shown in b-2 of FIG. 6B is generated for the original image shown in FIG. 6A, a second screen as a reduced original image is generated.

Thereafter, the screen output controller 49-3 simultaneously displays the first screen and the second screen on the display 33. For example, as shown in FIG. 6B, the original image b-2 that is digitally zoomed on the entire display unit 33 is displayed, and at the same time, the original image b-2 is reduced on a portion of the display unit 33. Is displayed.

Furthermore, the screen output control unit 49-3 displays where the digital zoomed image b-1 is located in the reduced original image b-2. In this way, the user can know where the digital zoomed portion is located on the screen before the digital zoom.

Hereinafter, a live screen display method in digital zoom according to the present invention will be described in detail with reference to FIG. 5. The method of displaying a live screen during digital zooming according to the present invention may be performed in the digital image processing apparatus as shown in FIG. 4. According to an exemplary embodiment, a main algorithm of a control method may be used to assist peripheral components in the control apparatus. It can be performed inside the control unit 49.

The controller 49 reads CCD data input from the subject through the lens and stores the CCD data in the storage 47 (step 501).

Then, the controller 49 generates Bayer (RGB) data from the CCD data stored in the storage 47 and stores the Bayer (RGB) data in the storage 47 (step 503).

The controller 49 converts Bayer (RGB) data stored in the storage 47 into YC _b C _r data (step 505).

Steps 501 to 505 represent operations of the imaging unit 43, the image processing unit 45, and the storage unit 47 under the control of the control unit 49, and the description thereof is disclosed above, and thus detailed description thereof will be omitted. .

Thereafter, the controller 49 displays the live view image (YC _b C _r data) as shown in FIG. 6A on the display 33 (step 509).

The controller 49 determines whether a telephoto-zoom button 31t input is received as a digital zoom signal while the live view image as shown in FIG. 6A is displayed (step 509), and receives a telephoto-zoom button 31t input. In one case, the digital zoomed image (b-1) shown in b-1 of FIG. 6b in which the size of a predetermined region of the original image shown in FIG. 6b is changed is generated, and the original image shown in FIG. In operation 511, the reduced original image b-1 is generated.

When generation of the digital zoomed image (b-1) and the reduced original image (b-1) is completed, the control unit 49, as shown in Figure 6b, the digital zoomed image ( b-1) is displayed and simultaneously the reduced original image b-2 is simultaneously displayed on a portion of the display 33 (step 513).

Furthermore, the controller 49 displays where the digital zoomed image b-1 is located in the reduced original image b-2. In this way, the user can know where the digital zoomed portion is located on the screen before the digital zoom.

As described above, according to the present invention, the digital view of the live view screen before the digital zoom and the live view screen before the digital zoom is displayed at the same time so as to know where the digital zoomed portion is located on the screen before the digital zoom, Convenience can be achieved.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

Claims (4)

A first screen generator for generating a first screen by changing a size of a predetermined area of an original image when a digital zoom signal is input; A second screen generator for generating a second screen by reducing the size of the entire original image to a predetermined size simultaneously with generating the first screen; And And a screen output controller configured to display the first screen on the entire display and to display the second screen on a predetermined area of the first screen. The method of claim 1, wherein the screen output control unit Wherein the first screen is displayed in which the second screen, wherein the live screen display device during digital zoom. (a) when a digital zoom signal is input to the displayed original image, generating a zoom image of which the size of a predetermined region of the original image is changed, and generating a reduced image in which the entire original image is reduced to a predetermined size; And (b) displaying the zoom image on the entire display and simultaneously displaying the reduced image on a portion of the zoom image. The method of claim 3, wherein And displaying the zoom image where the zoomed image is located.

Images