CN113793572A - Medical display brightness uniformity adjusting method and device - Google Patents
Medical display brightness uniformity adjusting method and device Download PDFInfo
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The invention provides a method and a device for adjusting brightness uniformity of a medical display, wherein the method comprises the following steps: dividing a screen of a medical display into a plurality of display areas; acquiring an image input signal, and dividing the image input signal into a plurality of independent image signal sources, wherein the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources are in one-to-one correspondence with the display areas; and respectively inputting a plurality of independent image signal sources into corresponding display areas to carry out brightness adjustment. The beneficial effects of the invention include: according to the invention, the screen of the medical display is divided into a plurality of display areas, and the brightness characteristic curve of each display area is measured respectively, so that the brightness is adjusted in a targeted manner, and the brightness adjustment of the medical display is more uniform.
Description
Technical Field
The invention relates to the technical field of medical display, in particular to a method and a device for adjusting brightness uniformity of a medical display.
Background
With the wider application of professional medical displays, doctors and image professionals have higher and higher requirements on image display quality, especially the brightness uniformity of the displays can directly influence the overall display effect of images, and most of the medical displays in the current market carry out brightness correction on the central area of the displays once. However, since the brightness characteristics of the peripheral area of the screen are different from the brightness characteristics of the central area, if the brightness correction data of the central area is used in the peripheral area, the GAMMA curve of the peripheral area cannot be completely consistent with the central area, and the brightness characteristics of the peripheral area cannot completely meet the medical image standard, so that the overall display effect of the image is poor, and even a medical accident may be caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a device for adjusting the brightness uniformity of a medical display, which can effectively solve the problem of uneven screen brightness and ensure that the brightness of the medical display meets the requirements of medical image standards. Specifically, in a first aspect of the present invention, a method for adjusting brightness uniformity of a medical display is provided, the method comprising: dividing a screen of a medical display into a plurality of display areas; acquiring an image input signal, and dividing the image input signal into a plurality of independent image signal sources, wherein the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources are in one-to-one correspondence with the display areas; and respectively inputting the independent image signal sources into corresponding display areas to carry out brightness adjustment.
In one or more embodiments, the acquiring an image input signal, splitting the image input signal into a plurality of independent image signal sources, includes: acquiring line field information of an image input signal; dividing the image input signal into a plurality of independent image signal sources based on the line-field information and division information of the plurality of display areas; the line field information of the image input signal comprises a horizontal starting position of an image, a horizontal effective area of the image, a vertical starting position of the image and a vertical effective area of the image.
In one or more embodiments, the inputting the plurality of independent image signal sources into corresponding display regions and adjusting the brightness of the plurality of display regions respectively includes: respectively measuring the brightness characteristic curves of the plurality of display areas through a preset color analyzer; performing GAMMA curve adjustment on the brightness characteristic curves of the plurality of display areas to enable the brightness characteristic curves to meet the light and shade change gradient required by the medical image standard, and acquiring corresponding GAMMA values; and performing GAMMA correction on the input image signal source based on the GAMMA values of the plurality of display regions to adjust the brightness of the output image.
In one or more embodiments, the method for adjusting brightness uniformity of a medical display of the present invention further comprises: and synthesizing the output images of the plurality of display areas into a complete image and outputting and displaying the complete image.
In one or more embodiments, the dividing the screen of the medical display into a plurality of display regions includes: the screen of the medical display is equally divided into 4 display areas.
In a second aspect of the present invention, a brightness uniformity adjusting apparatus for a medical display is provided, comprising: a partition display unit configured to divide a screen of the medical display into a plurality of display areas; the signal dividing unit is configured to acquire an image input signal and divide the image input signal into a plurality of independent image signal sources, wherein the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources are in one-to-one correspondence with the display areas; and the brightness adjusting unit is configured to input the independent image signal sources into corresponding display areas respectively to perform brightness adjustment.
In one or more embodiments, the signal segmentation unit is further configured to obtain line-field information of the image input signal; dividing the image input signal into a plurality of independent image signal sources based on the line-field information and division information of the plurality of display areas; the line field information of the image input signal comprises a horizontal starting position of an image, a horizontal effective area of the image, a vertical starting position of the image and a vertical effective area of the image.
In one or more embodiments, the brightness adjustment unit is further configured to measure the brightness characteristic curves of the plurality of display regions respectively through a preset color analyzer; performing GAMMA curve adjustment on the brightness characteristic curves of the plurality of display areas to enable the brightness characteristic curves to meet the light and shade change gradient required by the medical image standard, and acquiring corresponding GAMMA values; and performing GAMMA correction on the input image signal source based on the GAMMA values of the plurality of display regions to adjust the brightness of the output image.
In one or more embodiments, the partition display unit is further configured to synthesize the images output by the brightness adjustment unit for adjusting the plurality of display areas into a complete image and output and display the complete image.
In one or more embodiments, the partitioned display unit is further configured to equally divide the screen of the medical display into 4 display regions.
The beneficial effects of the invention include: the screen of the medical display is divided into a plurality of display areas, the brightness characteristic curve of each display area is measured respectively, the brightness characteristic curves of the display areas after adjustment are adjusted in a targeted mode and are made to accord with medical image standards, the GAMMA values of the display areas are determined, and GAMMA correction is conducted on the basis of the GAMMA values of the display areas, so that the brightness of the image input signals is adjusted more uniformly and the requirements of the medical image standards are met all the time.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for adjusting brightness uniformity of a medical display according to the present invention;
FIG. 2 is a graph showing the luminance characteristics of an LCD;
FIG. 3 is a graph of luminance characteristics for a human eye;
fig. 4 is a schematic diagram of a brightness uniformity adjusting device for a medical display according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
Fig. 1 is a flowchart illustrating a method for adjusting brightness uniformity of a medical display according to the present invention. As shown in fig. 1, the work flow of the brightness uniformity adjusting method for a medical display according to the present invention includes: step S1, dividing the screen of the medical display into a plurality of display areas; step S2, acquiring an image input signal, and dividing the image input signal into a plurality of independent image signal sources, wherein the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources and the display areas are in one-to-one correspondence; step S3 is to input the plurality of independent image signal sources into the corresponding display regions respectively to adjust the brightness.
Specifically, in order to achieve uniform display of screen brightness, the screen of the medical display is divided into a plurality of display areas in step S1, wherein the more the divided display areas are, the more uniform the adjusted screen brightness display is, but the less the number of the divided display areas is, otherwise, the processing speed is too slow, and the display effect is affected. As an alternative embodiment, the screen of the medical display is equally divided into 4 display areas; of course, the screen of the display may be equally divided into 6, 8 or 9, which is not particularly limited in the present invention. The purpose of equal division is to make the division operation of the input image signal in the subsequent step simpler; it is therefore within the scope of the invention to employ unequal division for certain specific needs.
In view of the above, one of the objectives of the present invention is to make brightness adjustment of a medical display more uniform, and therefore it is proposed to divide a screen of the medical display into a plurality of display areas to ensure that brightness adjustment is more uniform by performing individual brightness adjustment on the plurality of display areas. It should be noted that, the medical display in the present invention is a liquid crystal display, and the brightness adjustment of the liquid crystal display requires the adjustment of the input RGB signals; therefore, in order to achieve the above object, the present invention further needs to divide the obtained image input signal into a plurality of independent image signal sources in step S2; in step S3, the plurality of independent image signal sources are input to the corresponding display regions, respectively, and brightness adjustment is performed.
In some implementations, the step S2 of acquiring the image input signal, and dividing the image input signal into a plurality of independent image signal sources includes: acquiring line field information of an image input signal; dividing the image input signal into a plurality of independent image signal sources based on the line-field information and division information of the plurality of display areas; the line field information of the image input signal comprises a horizontal starting position of an image, a horizontal effective area of the image, a vertical starting position of the image and a vertical effective area of the image. As can be seen from the foregoing, the present invention needs to divide the input image signal into a plurality of independent image signal sources according to the division condition of the display screen, and therefore, the division information of a plurality of display areas, such as the division ratio, has to be considered; and dividing the line field information of the display images of different display areas by the same division ratio. Wherein the line field information of the input image signal gives the start position and the effective area of the complete image.
In some embodiments, step S3, inputting the independent image signal sources into the corresponding display regions respectively for brightness adjustment, including measuring brightness characteristic curves of the display regions respectively by a preset color analyzer; GAMMA curve adjustment is carried out on the brightness characteristic curves of the plurality of display areas to enable the brightness characteristic curves to meet the light and shade change gradient required by the medical image standard, and corresponding GAMMA values are obtained; GAMMA correction is performed on the input image signal source based on GAMMA values of the plurality of display regions, respectively, to adjust brightness of an output image. Wherein, the ideal GAMMA curve is an exponential function curve, and is expressed by a formula as follows:
output-inputGAMMA；
The purpose of adjusting the brightness characteristic curve is to make the brightness of the screen more suitable for the sensitivity of human eyes to the brightness interval. Note that, since the luminance characteristic curves of the respective display regions are different, the determined GAMMA values after the GAMMA curve adjustment are different from each other. Compared with the existing mode that the GAMMA correction is only carried out by adopting the same GAMMA value, the GAMMA correction of the invention is more targeted, so that the brightness display of the screen is more uniform. Wherein, the brightness characteristic curve of the liquid crystal screen and the brightness characteristic curve conforming to human eyes are respectively shown in fig. 2 and fig. 3; FIG. 2 is a graph showing the luminance characteristics of an LCD; wherein the abscissa is the driving voltage and the ordinate is the transmittance. FIG. 3 is a graph of luminance characteristics for a human eye; the abscissa is an input signal, generally an input current or voltage, and the ordinate is an output luminance.
In some embodiments, the method of the present invention further comprises synthesizing the output images of the plurality of display regions into a complete image and outputting for display. The image synthesis means is only required to adopt the conventional means, and the contrast of the invention is not limited.
On the basis of the above embodiments, in a second aspect of the present invention, a brightness uniformity adjusting device for a medical display is further provided, as shown in fig. 4.
Fig. 4 is a schematic diagram of a brightness uniformity adjusting device for a medical display according to the present invention. The brightness uniformity adjusting device for a medical display of the present invention comprises: a divisional display unit 10 configured to divide a screen of the medical display into a plurality of display areas; a signal dividing unit 20 configured to acquire an image input signal and divide the image input signal into a plurality of independent image signal sources, where the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources and the display areas are in one-to-one correspondence; and a brightness adjusting unit 30 configured to input the plurality of independent image signal sources to the corresponding display regions respectively to perform brightness adjustment.
In some embodiments, the signal segmentation unit 20 is further configured to obtain line-field information of the image input signal; dividing the image input signal into a plurality of independent image signal sources based on the line-field information and division information of the plurality of display areas; the line field information of the image input signal comprises a horizontal starting position of an image, a horizontal effective area of the image, a vertical starting position of the image and a vertical effective area of the image.
In some embodiments, the brightness adjusting unit 30 is further configured to measure the brightness characteristic curves of the plurality of display regions respectively by a preset color analyzer; GAMMA curve adjustment is carried out on the brightness characteristic curves of the plurality of display areas to enable the brightness characteristic curves to meet the light and shade change gradient required by the medical image standard, and corresponding GAMMA values are obtained; GAMMA correction is performed on the input image signal source based on GAMMA values of the plurality of display regions, respectively, to adjust brightness of an output image.
In some embodiments, the zone display unit 10 is further configured to equally divide the screen of the medical display into 4 display regions.
In one or more implementations, the partition display unit 10 is further configured to synthesize the images output by the brightness adjustment unit for the plurality of display area adjustments into a complete image and output the complete image for display.
By the method or the device for adjusting the brightness uniformity of the medical display, the screen of the medical display can be divided into a plurality of display areas, the brightness characteristic curve of each display area is measured respectively, targeted adjustment is performed, the adjusted brightness characteristic curve meets the medical image standard, the GAMMA value of each display area is determined, GAMMA correction is performed based on the GAMMA value of each display area, and the brightness adjustment is more uniform and always meets the requirement of the medical image standard.
In a third aspect of the present invention, there is also provided a medical display in which a computer program for implementing the steps of the method for adjusting brightness uniformity of a medical display in any of the above-described embodiments is configured.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A method for adjusting brightness uniformity of a medical display, the method comprising:
dividing a screen of a medical display into a plurality of display areas;
acquiring an image input signal, and dividing the image input signal into a plurality of independent image signal sources, wherein the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources are in one-to-one correspondence with the display areas;
and respectively inputting the independent image signal sources into corresponding display areas to carry out brightness adjustment.
2. The method for adjusting brightness uniformity of a medical display according to claim 1, wherein said obtaining an image input signal and splitting said image input signal into a plurality of independent image signal sources comprises:
acquiring line field information of an image input signal;
dividing the image input signal into a plurality of independent image signal sources based on the line-field information and division information of the plurality of display areas;
the line field information of the image input signal comprises a horizontal starting position of an image, a horizontal effective area of the image, a vertical starting position of the image and a vertical effective area of the image.
3. The method for adjusting brightness uniformity of a medical display according to claim 1, wherein the inputting the plurality of independent image signal sources into the corresponding display areas and adjusting the brightness of the plurality of display areas respectively comprises:
respectively measuring the brightness characteristic curves of the plurality of display areas through a preset color analyzer;
performing GAMMA curve adjustment on the brightness characteristic curves of the plurality of display areas to enable the brightness characteristic curves to meet the light and shade change gradient required by the medical image standard, and acquiring corresponding GAMMA values;
and performing GAMMA correction on the input image signal source based on the GAMMA values of the plurality of display regions to adjust the brightness of the output image.
4. The method for adjusting brightness uniformity of a medical display of claim 3, further comprising: and synthesizing the output images of the plurality of display areas into a complete image and outputting and displaying the complete image.
5. The method for adjusting brightness uniformity of a medical display according to claim 1, wherein said dividing a screen of a medical display into a plurality of display areas comprises: the screen of the medical display is equally divided into 4 display areas.
6. A brightness uniformity adjustment apparatus for a medical display, comprising:
a partition display unit configured to divide a screen of the medical display into a plurality of display areas;
the signal dividing unit is configured to acquire an image input signal and divide the image input signal into a plurality of independent image signal sources, wherein the number of the independent image signal sources is the same as that of the display areas, and the independent image signal sources are in one-to-one correspondence with the display areas; and
and the brightness adjusting unit is configured to input the independent image signal sources into corresponding display areas respectively to perform brightness adjustment.
7. The medical display brightness uniformity adjustment apparatus according to claim 6, wherein the signal segmentation unit is further configured to obtain line-field information of the image input signal; dividing the image input signal into a plurality of independent image signal sources based on the line-field information and division information of the plurality of display areas; the line field information of the image input signal comprises a horizontal starting position of an image, a horizontal effective area of the image, a vertical starting position of the image and a vertical effective area of the image.
8. The medical display brightness uniformity adjustment apparatus according to claim 6, wherein the brightness adjustment unit is further configured to measure brightness characteristic curves of the plurality of display areas respectively by a preset color analyzer; performing GAMMA curve adjustment on the brightness characteristic curves of the plurality of display areas to enable the brightness characteristic curves to meet the light and shade change gradient required by the medical image standard, and acquiring corresponding GAMMA values; and performing GAMMA correction on the input image signal source based on the GAMMA values of the plurality of display regions to adjust the brightness of the output image.
9. The brightness uniformity adjustment apparatus for medical displays according to claim 8, wherein the partition display unit is further configured to combine the images output by the brightness adjustment unit for adjusting the plurality of display areas into a complete image and output the complete image for display.
10. The brightness uniformity adjustment apparatus for a medical display according to claim 6, wherein the partition display unit is further configured to equally divide the screen of the medical display into 4 display areas.
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Cited By (2)
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| CN117831479A (en) * | 2024-01-30 | 2024-04-05 | 深圳市巨烽显示科技有限公司 | Single-color mixed display brightness control method and device for display |
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