CN104882098B - Method for correcting image and imaging sensor based on LED mosaic display screens - Google Patents
Method for correcting image and imaging sensor based on LED mosaic display screens Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of method for correcting image and imaging sensor based on LED mosaic display screens, for improving the uniformity that picture is shown, improve display effect.Present invention method includes：Obtain the image of LED mosaic display screens；According to the pixel coordinate position of pixel indicating template, the grayscale value and chromaticity coordinate value of the corresponding pixel of pixel coordinate position are obtained from image one by one；The gray scale compensation value of pixel is calculated according to grayscale value and the chromaticity coordinate offset of pixel is calculated according to chromaticity coordinate value；Gray scale compensation model is generated according to gray scale compensation value and chromatic compensation model is generated according to chromaticity coordinate offset；Gray scale compensation model and chromatic compensation model are sent to LED display control programs, so that LED display control programs are based on gray scale compensation model and chromatic compensation model carries out brightness to the display image of LED mosaic display screens and coloration is corrected.
Description
Technical field
The present invention relates to light emitting diode (Light-emitting Diode, abbreviation LED) mosaic screen display technology field,
More particularly to a kind of method for correcting image and imaging sensor based on LED mosaic display screens.
Background technology
Existing LED mosaic display screens use surface mount (Surface Mount Device, abbreviation SMD) technology by several
LED display unit be spliced, each LED display unit includes several LED light, and each LED light is respectively by tri- kinds of R, G and B
Primary colors LED particle forms.It is appreciated that when producing LED particle, the deviation that process parameter difference or particle size are cut is all
Influence whether that the performance of LED particle embodies.
The performance of LED particle can be embodied from brightness, specifically be divided into different brightness degrees, can also be from coloration upper body
It is existing, specifically can from color wavelength divided rank.In LED display unit used in LED mosaic display screens, if using not being
The LED particle of same grade, after integrally splicing, the corresponding display area of each display unit has color and bright on picture
Difference is spent, display effect is uneven.If for color and the uniformity of brightness, when splicing LED display, same grade is used
LED particle, then can improve cost.
Invention content
An embodiment of the present invention provides a kind of method for correcting image and imaging sensor based on LED mosaic display screens, use
To improve the uniformity that picture is shown, display effect is improved.
First aspect present invention provides a kind of method for correcting image based on LED mosaic display screens, can include：
Obtain the image of LED mosaic display screens；
According to the pixel coordinate position of pixel indicating template, the pixel point coordinates is obtained from described image one by one
The grayscale value and chromaticity coordinate value of the corresponding pixel in position, the pixel coordinate position of the pixel indicating template correspond to institute
State the LED light in the LED display unit of LED mosaic display screens；
The gray scale compensation value of pixel is calculated according to the grayscale value and the picture is calculated according to the chromaticity coordinate value
The chromaticity coordinate offset of vegetarian refreshments；
Gray scale compensation model is generated according to the gray scale compensation value and coloration is generated according to the chromaticity coordinate offset
Compensation model；
The gray scale compensation model and chromatic compensation model are sent to LED display control programs, so that the LED is shown
Control system the display image of LED mosaic display screens is carried out based on the gray scale compensation model and chromatic compensation model brightness and
Coloration is corrected.
Second aspect of the present invention provides a kind of imaging sensor, can include：
First acquisition unit, for obtaining the image of LED mosaic display screens；
Second acquisition unit, for the pixel coordinate position according to pixel indicating template, one by one from described image
Obtain the grayscale value and chromaticity coordinate value of the corresponding pixel of the pixel coordinate position, the picture of the pixel indicating template
Vegetarian refreshments coordinate position corresponds to the LED light in the LED display unit of the LED mosaic display screens；
Computing unit is sat for the gray scale compensation value that pixel is calculated according to the grayscale value and according to the coloration
Scale value calculates the chromaticity coordinate offset of the pixel；
Generation unit, for generating gray scale compensation model and according to the chromaticity coordinate according to the gray scale compensation value
Offset generates chromatic compensation model；
Transmitting element, for the gray scale compensation model and chromatic compensation model to be sent to LED display control programs, with
Toilet states LED display control programs based on the display of the gray scale compensation model and chromatic compensation model to LED mosaic display screens
Image carries out brightness and coloration correction.
As can be seen that the pixel indicating template of default setting can be utilized in the embodiment of the present invention, and pixel is shown
Each pixel coordinate position in template corresponds to a LED light respectively, that is, when LED tiled display screen display figures
During picture, a pixel of LED mosaic display screen epigraphs is corresponded to, and then can be according to the pixel of pixel indicating template
Coordinate position obtains the grayscale value and chromaticity coordinate value of corresponding pixel points from LED mosaic display screens, then calculates respectively each
The gray scale compensation value of pixel and chromaticity coordinate offset, further according to gray scale compensation value generate gray scale compensation model and according to
Chromaticity coordinate offset generates chromatic compensation model, LED display control programs is last transmitted to, by LED display control program roots
According into gray scale compensation model and chromatic compensation model cootrol image in LED tiled display screen displays, due to according to gray scale compensation
After value and chromaticity coordinate offset compensate pixel, the grayscale of each pixel is identical with coloration, and then ensures that it is aobvious
The uniformity shown improves display effect.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, it will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the schematic diagram of pixel indicating template provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of the method for correcting image provided in an embodiment of the present invention based on LED mosaic display screens；
Fig. 3 is the structure diagram of imaging sensor provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing of the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained without creative efforts
Example is applied, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a kind of method for correcting image based on LED mosaic display screens, are shown to improve picture
The uniformity shown improves display effect.It is square that the embodiment of the present invention additionally provides a kind of image calibration based on LED mosaic display screens
The corresponding imaging sensor of method.
Before technical solution of the present invention is introduced, first the image correction system of LED mosaic display screens is carried out simple
It introduces.
LED display system includes LED mosaic display screens, LED display control programs and ccd sensor, wherein, it is above-mentioned
LED mosaic display screens are connect with above-mentioned LED display control programs, and above-mentioned LED display control programs and above-mentioned ccd sensor connect
It connects, above-mentioned ccd sensor is positioned over the right opposite of LED mosaic display screens.Above-mentioned ccd sensor can be from LED mosaic display screens
Then photographs analyze image, obtain the grayscale value and chromaticity coordinate value of each pixel in image to image, and then
The gray scale compensation value of each pixel and chromaticity coordinate offset are calculated, gray scale compensation model will be worth to according to gray scale compensation,
Chromatic compensation model is worth to according to chromaticity coordinate compensation, gray scale compensation model and chromatic compensation model are sent to LED shows
Show control system, LED display control programs then can control LED mosaic display screens to show so that entire picture is shown uniformly, is carried
The display performance of high LED light.
First, obtain the spacing between LED display unit size, LED light size, LED particle size, two LED light with
And the resolution ratio of LED display unit, pixel indicating template is then made according to above- mentioned information.Referring to Fig. 1, Fig. 1 is this hair
The schematic diagram for the pixel indicating template that bright one embodiment provides；As shown in Figure 1, using wherein some LED display unit as
Example has spacing between LED light and LED light in LED display unit, R primary colors LED particle (figure is included in each LED light
Represented in 1 with R), G primary colors LED particle (being represented in Fig. 1 with G) and B primary colors LED particle (being represented in Fig. 1 with B).Above-mentioned pixel
LED light then corresponds to the position of the pixel on LED mosaic display screens in indicating template, therefore, certain is obtained in ccd sensor
A pixel can then be gone to obtain by LED light position.
Wherein, pixel indicating template is set in advance in ccd sensor.
Before being shot using ccd sensor, ccd sensor contraposition is first carried out, i.e., LED particle pair on LED mosaic display screens
It should be to relative coordinate position on the pixel indicating template.
Respectively there are three colored filter (color filter) on ccd sensor, respectively red (Red) filters
Piece, blue (blue) optical filter and green (green) optical filter.
Wherein, the red image sample shown by LED mosaic display screens is shot with ccd sensor collocation Red lightscreening plate；
With the green image sample shown by ccd sensor collocation green color filter shooting LED mosaic display screens；
With the blue image sample shown by ccd sensor collocation blue color filter shooting LED mosaic display screens；
Red, green and blue optical filter of being arranged in pairs or groups simultaneously with ccd sensor shoots the white shown by LED mosaic display screens
Image pattern.
It is understood that due under full-color CCD camera lenses, captured image may be with some mistakes on human eye sense organ
Therefore difference, shoots image using the mode that this ccd sensor and colored filter combine, can reduce because of face on color
Difference on color error or differentiation.
Ccd sensor collocation colored filter can specifically realize there are following two realization methods respectively by shaft disk：
Mode one, in ccd sensor front hanging red/green optical filter shaft disk, using rotating the mode of dish axle more
Change optical filter：
When red image sample to be shot, turntable goes to Red lightscreening plate；
When green image sample to be shot, turntable goes to green color filter；
When blue image sample to be shot, turntable goes to blue color filter；
When white image sample to be shot, turntable goes to red/green optical filter.
Mode two, immediately in ccd sensor front mount red/green optical filter：
When red image sample to be shot, i.e. carry Red lightscreening plate；
When green image sample to be shot, i.e. carry green color filter；
When blue image sample to be shot, i.e. carry blue color filter；
When white image sample to be shot, i.e. carry red/green optical filter.
Based on above-mentioned introduction, an embodiment of the present invention provides a kind of method for correcting image based on LED mosaic display screens, can
To include：Obtain the image of LED mosaic display screens；According to the pixel coordinate position of pixel indicating template, one by one from above-mentioned
The grayscale value and chromaticity coordinate value of the corresponding pixel of above-mentioned pixel coordinate position are obtained in image, above-mentioned pixel shows mould
The pixel coordinate position of plate corresponds to the LED light in the LED display unit of above-mentioned LED mosaic display screens；According to above-mentioned grayscale value
It calculates the gray scale compensation value of pixel and the chromaticity coordinate offset of above-mentioned pixel is calculated according to above-mentioned chromaticity coordinate value；
Gray scale compensation model is generated according to above-mentioned gray scale compensation value and chromatic compensation mould is generated according to above-mentioned chromaticity coordinate offset
Type；Above-mentioned gray scale compensation model and chromatic compensation model are sent to LED display control programs, so as to above-mentioned LED display controls
System carries out brightness and coloration based on above-mentioned gray scale compensation model and chromatic compensation model to the display image of LED mosaic display screens
Correction.
Referring to Fig. 2, Fig. 2 is the stream of the method for correcting image provided in an embodiment of the present invention based on LED mosaic display screens
Journey schematic diagram；As shown in Fig. 2, a kind of method for correcting image based on LED mosaic display screens, can include：
201st, the image of LED mosaic display screens is obtained；
In a manner that above-mentioned ccd sensor arranges in pairs or groups colored filter, the image of LED mosaic display screens is shot.
202nd, according to the pixel coordinate position of pixel indicating template, above-mentioned pixel is obtained from above-mentioned image one by one
The grayscale value and chromaticity coordinate value of the corresponding pixel of coordinate position, the pixel coordinate position pair of above-mentioned pixel indicating template
Answer the LED light in the LED display unit of above-mentioned LED mosaic display screens；
Represent that the coordinate position of LED light corresponds to pixel, can precisely be obtained using this mode on pixel indicating template
Take the grayscale value of the pixel and the chromaticity coordinate value of CIE xy.
Since distance is referred to as spacing between pixel and pixel, in embodiments of the present invention spacing is known as being not covered by showing
Show area.When ccd sensor carries out the acquisition of grayscale value and chromaticity coordinate value according to pixel indicating template, it can avoid being not covered by
Viewing area, to avoid the error caused due to shadow interferes in parsing.
203rd, the gray scale compensation value of pixel is calculated according to above-mentioned grayscale value and is calculated according to above-mentioned chromaticity coordinate value
State the chromaticity coordinate offset of pixel；
Using the image of ccd sensor shooting LED mosaic display screens, then analysis obtains R sub-pixels, the G in pixel
The grayscale value of sub-pixel, B sub-pixels in 256, then carries out model conversion, i.e., by CIE XYZ chromaticity coordinate conversion formulas
Transition matrix is transformed into tristimulus values X, Y, Z, then is converted into CIE xy chromaticity coordinate values by tristimulus values X, Y, Z.
204th, gray scale compensation model is generated according to above-mentioned gray scale compensation value and is generated according to above-mentioned chromaticity coordinate offset
Chromatic compensation model；
205th, above-mentioned gray scale compensation model and chromatic compensation model are sent to LED display control programs, so as to above-mentioned LED
Display control program carries out the display image of LED mosaic display screens based on above-mentioned gray scale compensation model and chromatic compensation model bright
Degree and coloration correction.
As can be seen that the pixel indicating template of default setting can be utilized in the embodiment of the present invention, and pixel is shown
Each pixel coordinate position in template corresponds to a LED light respectively, that is, when LED tiled display screen display figures
During picture, a pixel of LED mosaic display screen epigraphs is corresponded to, and then can be according to the pixel of pixel indicating template
Coordinate position obtains the grayscale value and chromaticity coordinate value of corresponding pixel points from LED mosaic display screens, then calculates respectively each
The gray scale compensation value of pixel and chromaticity coordinate offset, further according to gray scale compensation value generate gray scale compensation model and according to
Chromaticity coordinate offset generates chromatic compensation model, LED display control programs is last transmitted to, by LED display control program roots
According into gray scale compensation model and chromatic compensation model cootrol image in LED tiled display screen displays, due to according to gray scale compensation
After value and chromaticity coordinate offset compensate pixel, the grayscale of each pixel is identical with coloration, and then ensures that it is aobvious
The uniformity shown improves display effect.
In some enforceable modes of the invention, the above-mentioned gray scale compensation value packet that pixel is calculated according to above-mentioned grayscale value
It includes：Minimum gray value is found out from above-mentioned grayscale value, the difference of the grayscale value of above-mentioned minimum gray value and pixel is calculated, obtains
To the gray scale compensation value of above-mentioned pixel.
Wherein, red image sample, green image sample, blue image sample and white are shot by ccd sensor respectively
Color image sample, then obtains the grayscale value of each pixel on LED mosaic display screens, then therefrom calculates being averaged for pixel
The difference of maximum gray value and minimum gray value, the then grayscale value of minimum gray value and pixel in grayscale value and pixel
It then can be as the gray scale compensation value of pixel.
When pixel grayscale value is more than minimum gray value use-represent, when pixel grayscale value is less than minimum gray value, use
+ represent.For example, minimum gray value L150, the gray scale compensation value of the pixel of grayscale value L200 is -50；Grayscale value L180
Pixel gray scale compensation value be -30.
Since for LED mosaic display screens, institute's input signal picture/grayscale is identical, but since LED light is in processing procedure
It generates difference and causes showed grayscale value inconsistent, if pixel minimum gray value is in LED mosaic display screens
L150, and the grayscale value L200 that some pixel calculates, the grayscale value for representing the pixel are bigger, it is necessary to it reduces, because
This needs reduction by 50.
In some embodiments of the invention, the above-mentioned chromaticity coordinate that above-mentioned pixel is calculated according to above-mentioned chromaticity coordinate value is mended
Value is repaid to include：Find out minimal color coordinate value from above-mentioned chromaticity coordinate offset, calculate above-mentioned minimal color coordinate value with
The difference of the chromaticity coordinate value of above-mentioned pixel obtains the chromaticity coordinate offset of pixel.
Wherein, red image sample, green image sample, blue image sample and white are shot by ccd sensor respectively
Color image sample, then obtains the CIE xy chromaticity coordinate values of each pixel on LED mosaic display screens, then therefrom calculates
The maximum chrominance coordinate value of mean chromaticity coordinate value and pixel and minimal color coordinate value in the LED mosaic display screens, then count
The difference of the chromaticity coordinate value of minimal color coordinate value and pixel is calculated, difference is compensated as the chromaticity coordinate of pixel
Value.
For example, minimal color coordinate value is (0.312,0.329) in LED mosaic display screens, actually calculates certain
The chromaticity coordinate value of one pixel is (0.32,0.32), and the difference of the two is (- 0.08 ,+0.09).Wherein, with above-mentioned grayscale
Offset is similar, when minimal color coordinate value is more than the chromaticity coordinate value of pixel, for+represent, in minimal color coordinate value
Less than pixel chromaticity coordinate value when, with-represent.
As can be seen that it in embodiments of the present invention, is compensated by gray scale compensation value or CIE xy chromaticity coordinates offsets
Pixel.Specifically, will gray scale compensation table can be generated according to above-mentioned gray scale compensation value, the grayscale in above-mentioned gray scale compensation table is mended
Repay value correspond to LED light in the LED display unit of above-mentioned LED mosaic display screens and, given birth to according to above-mentioned chromaticity coordinate offset
Into chromatic compensation table, the LED displays that the chromaticity coordinate offset in above-mentioned chromatic compensation table corresponds to above-mentioned LED mosaic display screens are single
LED light in member.
Such as following table 1, it is the grayscale value of some LED display unit, can be represented with tabular form, correspondingly, list 2
For the gray scale compensation value of the LED display unit, also represented with tabular form.
| 113 | 113 | 110 | 112 | 113 | 113 | 112 | 120 |
| 113 | 113 | 112 | 115 | 113 | 120 | 113 | 120 |
| 113 | 120 | 112 | 113 | 113 | 113 | 114 | 115 |
| 113 | 113 | 114 | 120 | 113 | 115 | 113 | 113 |
| 115 | 112 | 112 | 113 | 112 | 114 | 115 | 113 |
| 112 | 115 | 130 | 114 | 110 | 113 | 112 | 112 |
| 120 | 113 | 113 | 113 | 113 | 112 | 113 | 120 |
| 113 | 115 | 110 | 115 | 112 | 113 | 112 | 115 |
Table 1
| -3 | -3 | 0 | -2 | -3 | -3 | -2 | -10 |
| -3 | -3 | -2 | -5 | -3 | -10 | -3 | -10 |
| -3 | -10 | -2 | -3 | -3 | -3 | -4 | -5 |
| -3 | -3 | -4 | -10 | -3 | -5 | -3 | -3 |
| -5 | -2 | -2 | -3 | -2 | -4 | -5 | -3 |
| -2 | -5 | -20 | -4 | 0 | -3 | -2 | -2 |
| -10 | -3 | -3 | -3 | -3 | -2 | -3 | -10 |
| -3 | -5 | 0 | -5 | -2 | -3 | -2 | -5 |
Table 2
As can be seen that after the gray scale compensation table shown in analogous list 2 is obtained, which is sent to LED and is shown
Show control system, then LED display control programs then can control LED mosaic screens to show according to the gray scale compensation table.
As shown in figure 3, the embodiment of the present invention additionally provides a kind of image calibration shown in Fig. 2 based on LED mosaic display screens
The corresponding imaging sensor of correction method, it may include：
First acquisition unit 310, for obtaining the image of LED mosaic display screens；
Second acquisition unit 320, for the pixel coordinate position according to pixel indicating template, one by one from described image
The middle grayscale value and chromaticity coordinate value for obtaining the corresponding pixel of the pixel coordinate position, the pixel indicating template
Pixel coordinate position corresponds to the LED light in the LED display unit of the LED mosaic display screens；
Computing unit 330, for the gray scale compensation value according to grayscale value calculating pixel and according to the coloration
Coordinate value calculates the chromaticity coordinate offset of the pixel；
Generation unit 340, for generating gray scale compensation model according to the gray scale compensation value and being sat according to the coloration
Mark offset generation chromatic compensation model；
Transmitting element 350, for the gray scale compensation model and chromatic compensation model to be sent to LED display controls system
System, so as to the LED display control programs based on the gray scale compensation model and chromatic compensation model to LED mosaic display screens
Show that image carries out brightness and coloration correction.
As can be seen that the pixel indicating template of default setting can be utilized in the embodiment of the present invention, and pixel is shown
Each pixel coordinate position in template corresponds to a LED light respectively, that is, when LED tiled display screen display figures
During picture, a pixel of LED mosaic display screen epigraphs is corresponded to, and then can be according to the pixel of pixel indicating template
Coordinate position, second acquisition unit 320 obtain the grayscale value and chromaticity coordinate value of corresponding pixel points from LED mosaic display screens,
Then computing unit 330 calculates the gray scale compensation value of each pixel and chromaticity coordinate offset respectively, the root again of generation unit 340
Gray scale compensation model is generated according to gray scale compensation value and chromatic compensation model is generated according to chromaticity coordinate offset, is finally sent
Unit 350 is sent to LED display control programs, by LED display control programs according into gray scale compensation model and chromatic compensation mould
Type controls image in LED tiled display screen displays, due to being clicked through according to gray scale compensation value and chromaticity coordinate offset to pixel
After row compensation, the grayscale of each pixel is identical with coloration, and then ensures the uniformity of its display, improves display effect.
The preferably above-mentioned ccd sensor of imaging sensor in the embodiment of the present invention, it is, of course, also possible to be other image procossings
Equipment.
Further, above-mentioned computing unit 330 is specifically used for, and minimum gray value is found out from above-mentioned grayscale value, calculates
The difference of the grayscale value of above-mentioned minimum gray value and pixel, obtains the gray scale compensation value of above-mentioned pixel；And.From above-mentioned color
Minimal color coordinate value is found out in degree coordinate offset, the coloration for calculating above-mentioned minimal color coordinate value and above-mentioned pixel is sat
The difference of scale value obtains the chromaticity coordinate offset of above-mentioned pixel.
Further, above-mentioned generation unit 340 is specifically used for, and gray scale compensation table is generated according to above-mentioned gray scale compensation value, on
It states the gray scale compensation value in gray scale compensation table and corresponds to LED light in the LED display unit of above-mentioned LED mosaic display screens；And root
According to above-mentioned chromaticity coordinate offset generation chromatic compensation table, the chromaticity coordinate offset in above-mentioned chromatic compensation table corresponds to above-mentioned
LED light in the LED display unit of LED mosaic display screens.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit can refer to the corresponding process in preceding method embodiment, and details are not described herein.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is independent product sale or uses
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
It embodies, which is stored in a storage medium, is used including some instructions so that a computer
Equipment (can be personal computer, server or the network equipment etc.) performs the complete of each embodiment the method for the present invention
Portion or part steps.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
Above to a kind of method for correcting image and imaging sensor based on LED mosaic display screens provided by the present invention into
Gone and be discussed in detail, for the thought of those of ordinary skill in the art, according to the present invention embodiment, in specific embodiment and
There will be changes in application range, in conclusion the content of the present specification should not be construed as limiting the invention.
Claims (10)
1. a kind of method for correcting image based on LED mosaic display screens, which is characterized in that including：
The image of LED mosaic display screens is obtained by ccd sensor；It specifically includes：It is clapped with ccd sensor collocation Red lightscreening plate
The red image sample shown by LED mosaic display screens is taken the photograph, with ccd sensor collocation green color filter shooting LED tiled displays
The shown green image sample of screen, with the blue shown by ccd sensor collocation blue color filter shooting LED mosaic display screens
Image pattern is arranged in pairs or groups red, white shown by green and blue optical filter shooting LED mosaic display screens simultaneously with ccd sensor
Color image sample；
According to the pixel coordinate position of pixel indicating template, the pixel coordinate position is obtained from described image one by one
The grayscale value and chromaticity coordinate value of corresponding pixel, described in the pixel coordinate position of the pixel indicating template corresponds to
LED light in the LED display unit of LED mosaic display screens；
The gray scale compensation value of pixel is calculated according to the grayscale value and the pixel is calculated according to the chromaticity coordinate value
Chromaticity coordinate offset；
Gray scale compensation model is generated according to the gray scale compensation value and chromatic compensation is generated according to the chromaticity coordinate offset
Model；
The gray scale compensation model and chromatic compensation model are sent to LED display control programs, so as to the LED display controls
System carries out brightness and coloration based on the gray scale compensation model and chromatic compensation model to the display image of LED mosaic display screens
Correction.
2. method for correcting image according to claim 1, which is characterized in that
The gray scale compensation value that pixel is calculated according to the grayscale value includes：
Minimum gray value is found out from the grayscale value, calculates the difference of the grayscale value of the minimum gray value and pixel,
Obtain the gray scale compensation value of the pixel.
3. method for correcting image according to claim 1 or 2, which is characterized in that
The chromaticity coordinate offset that the pixel is calculated according to the chromaticity coordinate value includes：
Minimal color coordinate value is found out from the chromaticity coordinate offset, calculates the minimal color coordinate value and the picture
The difference of the chromaticity coordinate value of vegetarian refreshments obtains the chromaticity coordinate offset of pixel.
4. method for correcting image according to claim 1, which is characterized in that
It is described to be included according to gray scale compensation value generation gray scale compensation model：
According to gray scale compensation value generation gray scale compensation table, the gray scale compensation value in the gray scale compensation table corresponds to the LED
LED light in the LED display unit of mosaic display screen.
5. the method for correcting image according to claim 1 or 4, which is characterized in that
It is described to be included according to chromaticity coordinate offset generation chromatic compensation model：
According to chromaticity coordinate offset generation chromatic compensation table, the chromaticity coordinate offset in the chromatic compensation table corresponds to
LED light in the LED display unit of the LED mosaic display screens.
6. a kind of imaging sensor, which is characterized in that including：
First acquisition unit, for obtaining the image of LED mosaic display screens by ccd sensor；It specifically includes：It is sensed with CCD
Red image sample shown by device collocation Red lightscreening plate shooting LED mosaic display screens, with ccd sensor collocation green filter
Green image sample shown by piece shooting LED mosaic display screens, with ccd sensor collocation blue color filter shooting LED splicings
Blue image sample shown by display screen, red, the green and blue optical filter shooting LED that arranged in pairs or groups simultaneously with ccd sensor are spelled
Connect the white image sample shown by display screen；
Second acquisition unit for the pixel coordinate position according to pixel indicating template, is obtained from described image one by one
The grayscale value and chromaticity coordinate value of the corresponding pixel of the pixel coordinate position, the pixel of the pixel indicating template
Coordinate position corresponds to the LED light in the LED display unit of the LED mosaic display screens；
Computing unit, for the gray scale compensation value according to grayscale value calculating pixel and according to the chromaticity coordinate value
Calculate the chromaticity coordinate offset of the pixel；
Generation unit, for generating gray scale compensation model according to the gray scale compensation value and being compensated according to the chromaticity coordinate
Value generation chromatic compensation model；
Transmitting element, for the gray scale compensation model and chromatic compensation model to be sent to LED display control programs, with toilet
State display image of the LED display control programs based on the gray scale compensation model and chromatic compensation model to LED mosaic display screens
Carry out brightness and coloration correction.
7. imaging sensor according to claim 6, which is characterized in that including：
The computing unit is specifically used for, and minimum gray value is found out from the grayscale value, calculate the minimum gray value with
The difference of the grayscale value of pixel obtains the gray scale compensation value of the pixel.
8. the imaging sensor described according to claim 6 or 7, which is characterized in that including：
The computing unit is specifically additionally operable to, and minimal color coordinate value is found out from the chromaticity coordinate offset, calculates institute
The difference of minimal color coordinate value and the chromaticity coordinate value of the pixel is stated, obtains the chromaticity coordinate compensation of the pixel
Value.
9. imaging sensor according to claim 6, which is characterized in that
The generation unit is specifically used for, and gray scale compensation table is generated according to the gray scale compensation value, in the gray scale compensation table
Gray scale compensation value corresponds to the LED light in the LED display unit of the LED mosaic display screens.
10. the imaging sensor according to claim 6 or 9, which is characterized in that
The generation unit is specifically used for, and chromatic compensation table, the chromatic compensation table are generated according to the chromaticity coordinate offset
In chromaticity coordinate offset correspond to LED light in the LED display unit of the LED mosaic display screens.
Priority Applications (1)
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