CN104882098A - Image correction method based on LED splicing display screen and image sensor - Google Patents
Image correction method based on LED splicing display screen and image sensor Download PDFInfo
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Abstract
The embodiment of the invention discloses an image correction method based on an LED splicing display screen and an image sensor. Therefore, picture display uniformity is improved and a display effect is enhanced. The method comprises: obtaining an image of an LED splicing display screen; according to a pixel point coordinate position of a pixel point display template, obtaining a gray scale value and a chromaticity coordinate value of a pixel point corresponding to the pixel point coordinate position from the image one by one; calculating a gray scale compensation value of the pixel point based on the gray scale value and calculating a chromaticity coordinate compensation value of the pixel point based on the chromaticity coordinate value; generating a gray scale compensation model based on the gray scale compensation value and generating a chromaticity compensation model based on the chromaticity coordinate compensation value; and sending the gray scale compensation model and the chromaticity compensation model to an LED display control system, thereby enabling the LED display control system to carry out brightness and chromaticity correction on a display image of the LED splicing display screen based on the gray scale compensation model and the chromaticity compensation model.
Description
Technical field
The present invention relates to light emitting diode (Light-emitting Diode is called for short LED) mosaic screen display technique field, be specifically related to a kind of method for correcting image based on LED mosaic display screen and imageing sensor.
Background technology
Existing LED mosaic display screen is by some employing surface mount (Surface Mount Device, being called for short SMD) LED display unit of technology is spliced, each LED display unit comprises some LED, and each LED is made up of R, G and B tri-kinds of primary colors LED particle respectively.Be appreciated that when production LED particle, the performance that the deviation that process parameter difference or particle size cut all can have influence on LED particle embodies.
The performance of LED particle can embody from brightness, is specifically divided into different brightness degree, also can embody from colourity, specifically can from divided rank color wavelength.At the LED display unit that LED mosaic display screen uses, be not the LED particle of same grade if use, after entirety splicing, the viewing area that on picture, each display unit is corresponding has color and luminance difference, and display effect is uneven.If the homogeneity of color and brightness, when splicing LED display, using the LED particle of same grade, then can raise the cost.
Summary of the invention
Embodiments provide a kind of method for correcting image based on LED mosaic display screen and imageing sensor, in order to improve the homogeneity of picture display, improve display effect.
First aspect present invention provides a kind of method for correcting image based on LED mosaic display screen, can comprise:
Obtain the image of LED mosaic display screen;
According to the pixel coordinate position of pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to described pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding described LED mosaic display screen of pixel coordinate position of described pixel indicating template from described image;
Calculate the gray scale compensation value of pixel according to described grey decision-making, and calculate the chromaticity coordinate offset of described pixel according to described chromaticity coordinate value;
Generate gray scale compensation model according to described gray scale compensation value, and generate chromatic compensation model according to described chromaticity coordinate offset;
Described gray scale compensation model and chromatic compensation model are sent to LED display control program, so that described LED display control program is based on described gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
Second aspect present invention provides a kind of imageing sensor, can comprise:
First acquiring unit, for obtaining the image of LED mosaic display screen;
Second acquisition unit, for the pixel coordinate position according to pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to described pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding described LED mosaic display screen of pixel coordinate position of described pixel indicating template from described image;
Computing unit, for calculating the gray scale compensation value of pixel according to described grey decision-making, and calculates the chromaticity coordinate offset of described pixel according to described chromaticity coordinate value;
Generation unit, for generating gray scale compensation model according to described gray scale compensation value, and generates chromatic compensation model according to described chromaticity coordinate offset;
Transmitting element, for described gray scale compensation model and chromatic compensation model are sent to LED display control program, so that described LED display control program is based on described gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
Can find out, the pixel indicating template preset and arrange can be utilized in the embodiment of the present invention, and each the pixel coordinate position in pixel indicating template correspond to a LED respectively, namely when LED tiled display screen display image, correspond to a pixel of LED mosaic display screen epigraph, and then can according to the pixel coordinate position of pixel indicating template, grey decision-making and the chromaticity coordinate value of corresponding pixel points is obtained from LED mosaic display screen, then gray scale compensation value and the chromaticity coordinate offset of each pixel is calculated respectively, gray scale compensation model is generated again according to gray scale compensation value, and generate chromatic compensation model according to chromaticity coordinate offset, finally send to LED display control program, by LED display control program according to becoming gray scale compensation model and chromatic compensation model cootrol image in LED tiled display screen display, after pixel being compensated according to gray scale compensation value and chromaticity coordinate offset, the GTG of each pixel is identical with colourity, and then ensure its homogeneity shown, improve display effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in the embodiment of the present invention below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram of the pixel indicating template that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet of the method for correcting image based on LED mosaic display screen that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the imageing sensor that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing of the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiments provide a kind of method for correcting image based on LED mosaic display screen, in order to improve the homogeneity of picture display, improve display effect.The embodiment of the present invention additionally provides the corresponding imageing sensor of a kind of method for correcting image based on LED mosaic display screen.
Before technical solution of the present invention is introduced, first the image correction system of LED mosaic display screen is simply introduced.
LED display system includes LED mosaic display screen, LED display control program and ccd sensor, wherein, above-mentioned LED mosaic display screen is connected with above-mentioned LED display control program, above-mentioned LED display control program is connected with above-mentioned ccd sensor, and above-mentioned ccd sensor is positioned over the right opposite of LED mosaic display screen.Above-mentioned ccd sensor can from LED mosaic display screen photographs to image, then image is analyzed, obtain grey decision-making and the chromaticity coordinate value of each pixel in image, and then calculate gray scale compensation value and the chromaticity coordinate offset of each pixel, gray scale compensation model will be obtained according to gray scale compensation value, chromatic compensation model is obtained with according to chromaticity coordinate offset, gray scale compensation model and chromatic compensation model are sent to LED display control program, LED display control program then can show by control LED mosaic display screen, whole picture is made to show evenly, improve the display performance of LED.
First, the spacing between acquisition LED display unit size, LED size, LED particle size, two LED and the resolution of LED display unit, then make pixel indicating template according to above-mentioned information.Refer to Fig. 1, the schematic diagram of the pixel indicating template that Fig. 1 provides for one embodiment of the invention; As shown in Figure 1, for wherein some LED display units, in LED display unit between LED and LED, there is spacing, in each LED, include R primary colors LED particle (representing with R in Fig. 1), G primary colors LED particle (representing with G in Fig. 1) and B primary colors LED particle (representing with B in Fig. 1).In above-mentioned pixel indicating template, LED then correspond to the position of the pixel on LED mosaic display screen, therefore, obtains certain pixel at ccd sensor, then can go to obtain by LED position.
Wherein, pixel indicating template is set in advance in ccd sensor.
Before adopting ccd sensor shooting, first carry out ccd sensor contraposition, namely LED particle on LED mosaic display screen is corresponded to relative coordinate position on this pixel indicating template.
Ccd sensor has three colored filters (color filter) respectively, is respectively red (Red) optical filter, blueness (blue) optical filter and green (green) optical filter.
Wherein, with the red image sample shown by ccd sensor collocation Red lightscreening plate shooting LED mosaic display screen;
With the green image sample shown by ccd sensor collocation green color filter shooting LED mosaic display screen;
With the blue image sample shown by ccd sensor collocation blue color filter shooting LED mosaic display screen;
To arrange in pairs or groups the white image sample shown by redness, green and blue color filter shooting LED mosaic display screen with ccd sensor simultaneously.
Be understandable that, due under full-color CCD camera lens, captured image may with some error on human eye sense organ, therefore, utilize the mode of this ccd sensor and colored filter combination to take image, can reduce because of the difference on color error on color or differentiation.
Ccd sensor collocation colored filter specifically can be realized by rotating shaft dish, has following two kinds of implementations respectively:
Mode one, at ccd sensor front hanging red/green optical filter rotating shaft dish, the mode of rolling disc axle is utilized to change optical filter:
When taking red image sample, rotating disk forwards Red lightscreening plate to;
When taking green image sample, rotating disk forwards green color filter to;
When taking blue image sample, rotating disk forwards blue color filter to;
When taking white image sample, rotating disk forwards red/green optical filter to.
Mode two, instant at ccd sensor front mount red/green optical filter:
When red image sample will be taken, i.e. carry Red lightscreening plate;
When green image sample will be taken, i.e. carry green color filter;
When blue image sample will be taken, i.e. carry blue color filter;
When white image sample will be taken, i.e. carry red/green optical filter.
Based on above-mentioned introduction, embodiments provide a kind of method for correcting image based on LED mosaic display screen, can comprise: the image obtaining LED mosaic display screen; According to the pixel coordinate position of pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to above-mentioned pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding above-mentioned LED mosaic display screen of pixel coordinate position of above-mentioned pixel indicating template from above-mentioned image; Calculate the gray scale compensation value of pixel according to above-mentioned grey decision-making, and calculate the chromaticity coordinate offset of above-mentioned pixel according to above-mentioned chromaticity coordinate value; Generate gray scale compensation model according to above-mentioned gray scale compensation value, and generate chromatic compensation model according to above-mentioned chromaticity coordinate offset; Above-mentioned gray scale compensation model and chromatic compensation model are sent to LED display control program, so that above-mentioned LED display control program is based on above-mentioned gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
Refer to Fig. 2, the schematic flow sheet of the method for correcting image based on LED mosaic display screen that Fig. 2 provides for the embodiment of the present invention; As shown in Figure 2, a kind of method for correcting image based on LED mosaic display screen, can comprise:
201, the image of LED mosaic display screen is obtained;
Adopt the mode of above-mentioned ccd sensor collocation colored filter, the image of shooting LED mosaic display screen.
202, according to the pixel coordinate position of pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to above-mentioned pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding above-mentioned LED mosaic display screen of pixel coordinate position of above-mentioned pixel indicating template from above-mentioned image;
Pixel indicating template represents the coordinate position of LED corresponds to pixel, utilize this mode precisely can obtain the grey decision-making of this pixel and the chromaticity coordinate value of CIE xy.
Because the spacing of pixel and pixel is referred to as spacing, spacing is called does not contain viewing area in embodiments of the present invention.When ccd sensor carries out the acquisition of grey decision-making and chromaticity coordinate value according to pixel indicating template, can avoid not containing viewing area, to avoid the error causing because of shadow interference resolving.
203, calculate the gray scale compensation value of pixel according to above-mentioned grey decision-making, and calculate the chromaticity coordinate offset of above-mentioned pixel according to above-mentioned chromaticity coordinate value;
Ccd sensor is utilized to take the image of LED mosaic display screen, then analysis obtains R sub-pixel, G sub-pixel, the grey decision-making of B sub-pixel in 256 in pixel, then model conversion is carried out, namely through CIE XYZ chromaticity coordinate conversion formula transition matrix, be transformed into tristimulus values X, Y, Z, then convert CIE xy chromaticity coordinate value to by tristimulus values X, Y, Z.
204, generate gray scale compensation model according to above-mentioned gray scale compensation value, and generate chromatic compensation model according to above-mentioned chromaticity coordinate offset;
205, above-mentioned gray scale compensation model and chromatic compensation model are sent to LED display control program, so that above-mentioned LED display control program is based on above-mentioned gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
Can find out, the pixel indicating template preset and arrange can be utilized in the embodiment of the present invention, and each the pixel coordinate position in pixel indicating template correspond to a LED respectively, namely when LED tiled display screen display image, correspond to a pixel of LED mosaic display screen epigraph, and then can according to the pixel coordinate position of pixel indicating template, grey decision-making and the chromaticity coordinate value of corresponding pixel points is obtained from LED mosaic display screen, then gray scale compensation value and the chromaticity coordinate offset of each pixel is calculated respectively, gray scale compensation model is generated again according to gray scale compensation value, and generate chromatic compensation model according to chromaticity coordinate offset, finally send to LED display control program, by LED display control program according to becoming gray scale compensation model and chromatic compensation model cootrol image in LED tiled display screen display, after pixel being compensated according to gray scale compensation value and chromaticity coordinate offset, the GTG of each pixel is identical with colourity, and then ensure its homogeneity shown, improve display effect.
In some enforceable modes of the present invention, the above-mentioned gray scale compensation value according to above-mentioned grey decision-making calculating pixel comprises: from above-mentioned grey decision-making, find out minimum gray value, calculate the difference of the grey decision-making of above-mentioned minimum gray value and pixel, obtain the gray scale compensation value of above-mentioned pixel.
Wherein, respectively by ccd sensor shooting red image sample, green image sample, blue image sample and white image sample, then the grey decision-making of each pixel on LED mosaic display screen is obtained, therefrom calculate the maximum gray value in the average gray-scale value of pixel and pixel and minimum gray value again, then the difference of the grey decision-making of minimum gray value and pixel then can as the gray scale compensation value of pixel.
When pixel grey decision-making be greater than minimum gray value with-represent, when pixel grey decision-making is less than minimum gray value, with+represent.For example, the gray scale compensation value of the pixel of minimum gray value L150, grey decision-making L200 is-50; The gray scale compensation value of the pixel of grey decision-making L180 is-30.
Due to for LED mosaic display screen, institute's input signal picture/GTG is identical, but cause showed grey decision-making inconsistent because LED produces difference at processing procedure, if pixel minimum gray value is L150 in LED mosaic display screen, and the grey decision-making L200 that certain pixel calculates, the grey decision-making representing this pixel is larger, must reduce, and therefore needs reduction by 50.
In some embodiments of the invention, the above-mentioned chromaticity coordinate offset calculating above-mentioned pixel according to above-mentioned chromaticity coordinate value comprises: from above-mentioned chromaticity coordinate offset, find out minimal color coordinate figure, calculate the difference of the chromaticity coordinate value of above-mentioned minimal color coordinate figure and above-mentioned pixel, obtain the chromaticity coordinate offset of pixel.
Wherein, respectively by ccd sensor shooting red image sample, green image sample, blue image sample and white image sample, then the CIE xy chromaticity coordinate value of each pixel on LED mosaic display screen is obtained, therefrom calculate maximum chrominance coordinate figure and the minimal color coordinate figure of mean chromaticity coordinate value and pixel in this LED mosaic display screen again, calculate the difference of the chromaticity coordinate value of minimal color coordinate figure and pixel again, its difference is as the chromaticity coordinate offset of pixel.
For example, in LED mosaic display screen, minimal color coordinate figure is (0.312,0.329), and in fact calculate the chromaticity coordinate value of some pixels for (0.32,0.32), both differences are (-0.08 ,+0.09).Wherein, be worth similar to above-mentioned gray scale compensation, when minimal color coordinate figure is greater than the chromaticity coordinate value of pixel, for+represent, when minimal color coordinate figure is less than the chromaticity coordinate value of pixel, with-represent.
Can find out, in embodiments of the present invention, take retrieved image vegetarian refreshments by gray scale compensation value or CIE xy chromaticity coordinate offset.Particularly, gray scale compensation table can be generated by according to above-mentioned gray scale compensation value, LED in the LED display unit of the corresponding above-mentioned LED mosaic display screen of the gray scale compensation value in above-mentioned gray scale compensation table, and, chromatic compensation table is generated, the LED in the LED display unit of the corresponding above-mentioned LED mosaic display screen of the chromaticity coordinate offset in above-mentioned chromatic compensation table according to above-mentioned chromaticity coordinate offset.
Following list 1, is the grey decision-making of some LED display units, can represents with tabular form, and correspondingly, list 2 is the gray scale compensation value of this LED display unit, also represents 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
Can find out, after obtaining the gray scale compensation table shown in analogous list 2, this gray scale compensation table be sent to LED display control program, then LED display control program then can show according to this gray scale compensation table control LED mosaic screen.
As shown in Figure 3, the embodiment of the present invention additionally provides the imageing sensor corresponding based on the method for correcting image of LED mosaic display screen shown in a kind of Fig. 2, can comprise:
First acquiring unit 310, for obtaining the image of LED mosaic display screen;
Second acquisition unit 320, for the pixel coordinate position according to pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to described pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding described LED mosaic display screen of pixel coordinate position of described pixel indicating template from described image;
Computing unit 330, for calculating the gray scale compensation value of pixel according to described grey decision-making, and calculates the chromaticity coordinate offset of described pixel according to described chromaticity coordinate value;
Generation unit 340, for generating gray scale compensation model according to described gray scale compensation value, and generates chromatic compensation model according to described chromaticity coordinate offset;
Transmitting element 350, for described gray scale compensation model and chromatic compensation model are sent to LED display control program, so that described LED display control program is based on described gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
Can find out, the pixel indicating template preset and arrange can be utilized in the embodiment of the present invention, and each the pixel coordinate position in pixel indicating template correspond to a LED respectively, namely when LED tiled display screen display image, correspond to a pixel of LED mosaic display screen epigraph, and then can according to the pixel coordinate position of pixel indicating template, second acquisition unit 320 obtains grey decision-making and the chromaticity coordinate value of corresponding pixel points from LED mosaic display screen, then computing unit 330 calculates gray scale compensation value and the chromaticity coordinate offset of each pixel respectively, generation unit 340 generates gray scale compensation model according to gray scale compensation value again, and generate chromatic compensation model according to chromaticity coordinate offset, last transmitting element 350 sends to LED display control program, by LED display control program according to becoming gray scale compensation model and chromatic compensation model cootrol image in LED tiled display screen display, after pixel being compensated according to gray scale compensation value and chromaticity coordinate offset, the GTG of each pixel is identical with colourity, and then ensure its homogeneity shown, improve display effect.
The preferred above-mentioned ccd sensor of imageing sensor in the embodiment of the present invention certainly, can also be other image processing equipment.
Further, above-mentioned computing unit 330 specifically for, from above-mentioned grey decision-making, find out minimum gray value, calculate the difference of the grey decision-making of above-mentioned minimum gray value and pixel, obtain the gray scale compensation value of above-mentioned pixel; And.From above-mentioned chromaticity coordinate offset, find out minimal color coordinate figure, calculate the difference of the chromaticity coordinate value of above-mentioned minimal color coordinate figure and above-mentioned pixel, obtain the chromaticity coordinate offset of above-mentioned pixel.
Further, above-mentioned generation unit 340 specifically for, generate gray scale compensation table according to above-mentioned gray scale compensation value, the LED in the LED display unit of the corresponding above-mentioned LED mosaic display screen of the gray scale compensation value in above-mentioned gray scale compensation table; And, generate chromatic compensation table according to above-mentioned chromaticity coordinate offset, the LED in the LED display unit of the corresponding above-mentioned LED mosaic display screen of the chromaticity coordinate offset in above-mentioned chromatic compensation table.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
Above a kind of method for correcting image based on LED mosaic display screen provided by the present invention and imageing sensor are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. based on a method for correcting image for LED mosaic display screen, it is characterized in that, comprising:
Obtain the image of LED mosaic display screen;
According to the pixel coordinate position of pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to described pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding described LED mosaic display screen of pixel coordinate position of described pixel indicating template from described image;
Calculate the gray scale compensation value of pixel according to described grey decision-making, and calculate the chromaticity coordinate offset of described pixel according to described chromaticity coordinate value;
Generate gray scale compensation model according to described gray scale compensation value, and generate chromatic compensation model according to described chromaticity coordinate offset;
Described gray scale compensation model and chromatic compensation model are sent to LED display control program, so that described LED display control program is based on described gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
2. method for correcting image according to claim 1, is characterized in that,
The described gray scale compensation value according to described grey decision-making calculating pixel comprises:
From described grey decision-making, find out minimum gray value, calculate the difference of the grey decision-making of described minimum gray value and pixel, obtain the gray scale compensation value of described pixel.
3. method for correcting image according to claim 1 and 2, is characterized in that,
The described chromaticity coordinate offset calculating described pixel according to described chromaticity coordinate value comprises:
From described chromaticity coordinate offset, find out minimal color coordinate figure, calculate the difference of the chromaticity coordinate value of described minimal color coordinate figure and described pixel, obtain the chromaticity coordinate offset of pixel.
4. method for correcting image according to claim 1, is characterized in that,
Describedly generate gray scale compensation model according to described gray scale compensation value and comprise:
Gray scale compensation table is generated, the LED in the LED display unit of the corresponding described LED mosaic display screen of the gray scale compensation value in described gray scale compensation table according to described gray scale compensation value.
5. the method for correcting image according to claim 1 or 4, is characterized in that,
Describedly generate chromatic compensation model according to described chromaticity coordinate offset and comprise:
Chromatic compensation table is generated, the LED in the LED display unit of the corresponding described LED mosaic display screen of the chromaticity coordinate offset in described chromatic compensation table according to described chromaticity coordinate offset.
6. an imageing sensor, is characterized in that, comprising:
First acquiring unit, for obtaining the image of LED mosaic display screen;
Second acquisition unit, for the pixel coordinate position according to pixel indicating template, grey decision-making and the chromaticity coordinate value of pixel corresponding to described pixel coordinate position is obtained one by one, the LED in the LED display unit of the corresponding described LED mosaic display screen of pixel coordinate position of described pixel indicating template from described image;
Computing unit, for calculating the gray scale compensation value of pixel according to described grey decision-making, and calculates the chromaticity coordinate offset of described pixel according to described chromaticity coordinate value;
Generation unit, for generating gray scale compensation model according to described gray scale compensation value, and generates chromatic compensation model according to described chromaticity coordinate offset;
Transmitting element, for described gray scale compensation model and chromatic compensation model are sent to LED display control program, so that described LED display control program is based on described gray scale compensation model and chromatic compensation model, the display image to LED mosaic display screen carries out brightness and colourity rectification.
7. imageing sensor according to claim 6, is characterized in that, comprising:
Described computing unit specifically for, from described grey decision-making, find out minimum gray value, calculate the difference of the grey decision-making of described minimum gray value and pixel, obtain the gray scale compensation value of described pixel.
8. the imageing sensor according to claim 6 or 7, is characterized in that, comprising:
Described computing unit concrete also for, from described chromaticity coordinate offset, find out minimal color coordinate figure, calculate the difference of the chromaticity coordinate value of described minimal color coordinate figure and described pixel, obtain the chromaticity coordinate offset of described pixel.
9. imageing sensor according to claim 6, is characterized in that,
Described generation unit specifically for, generate gray scale compensation table according to described gray scale compensation value, the LED in the LED display unit of the corresponding described LED mosaic display screen of the gray scale compensation value in described gray scale compensation table.
10. the imageing sensor according to claim 6 or 9, is characterized in that,
Described generation unit specifically for, generate chromatic compensation table according to described chromaticity coordinate offset, the LED in the LED display unit of the corresponding described LED mosaic display screen of the chromaticity coordinate offset in described chromatic compensation table.
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