CN105825802A - Display screen chromatic aberration correction method - Google Patents

Abstract

The invention discloses a display screen chromatic aberration correction method, and includes the steps of: S1. drawing pixel point chromaticity coordinates as target chromaticity coordinates according to a test image; S2. generating an actual measurement image according to the test image, and extracting pixels of a plurality of coordinate points of the actual measurement image; S3. comparing synthesized three primary colors of the extracted points with synthesized three primary colors of corresponding coordinate points in the target chromaticity coordinates, and judging whether chromatic aberration exists; S4. drawing pixel point chromaticity coordinates of the actual measurement image as actual measurement chromaticity coordinates; S5. calculating an chromatic aberration value of corresponding coordinate points of the actual measurement chromaticity coordinates and the target chromaticity coordinates, and generating initial chromatic aberration coordinates; S7. obtaining average deviation coordinates according to the initial chromatic aberration coordinates and contrast chromatic aberration coordinates; and S8. after a subsequent to-be-displayed image is compensated according to the average deviation coordinates, sending the to-be-displayed image after compensation to a screen to be displayed. The display screen chromatic aberration correction method is in favor of unification of standards for screen display chromatic aberration judgment, and guarantees the precision of chromatic aberration compensation of the to-be-displayed image.

Description

A kind of display screen chromatic aberration correction method

Technical field

The present invention relates to display screen technology field, particularly relate to a kind of display screen chromatic aberration correction method.

Background technology

Growing along with electronic technology, lcd technology is applied more and more extensive in daily life.At present, liquid crystal display screen of the prior art changes in the display cycle of face at one, the voltage of each pixel of liquid crystal display screen is fixing, liquid crystal molecule action is made to obtain certain light penetration, to show picture, until next picture cycle, then impose the different speed limit voltage light penetration with change liquid crystal molecule, show different pictures.This kind of display packing can have the problem of afterimage of image when showing fast moving pictures, consequently, it is possible to produce the problems such as picture color crosstalk, causes display screen to show picture quality problems.

Summary of the invention

The technical problem existed based on background technology, the present invention proposes a kind of display screen chromatic aberration correction method.

A kind of display screen chromatic aberration correction method that the present invention proposes, comprises the following steps:

S1, according to test image rendering pixel chromaticity coordinates as target color coordinates, pixel chromaticity coordinates carries out record to the synthesis three primary colours of each pixel of screen during display screen display test image；

S2, screen carry out display according to test image and generate measuring image, the pixel of the extraction multiple coordinate points of measuring image, and analyze the synthesis three primary colours of each extraction point；

S3, the synthesis three primary colours of coordinate points corresponding with target color coordinates for the synthesis three primary colours of extraction point are contrasted, and judge whether aberration exists, there is not then return step S1, exist, carry out step S4；

S4, draw measuring image pixel chromaticity coordinates as actual measurement chromaticity coordinates；

S5, calculating actual measurement chromaticity coordinates and the value of chromatism of target color coordinates respective coordinates point, and generate initial color difference coordinates；

S6, renewal test image, and repaint new target color coordinates and new actual measurement chromaticity coordinates according to new test image, calculate new target color coordinates and the value of chromatism of new actual measurement chromaticity coordinates respective coordinates point, generate compared colour difference's coordinate；

S7, obtain inequality coordinate according to initial color difference coordinates and compared colour difference's coordinate；

S8, according to inequality coordinate, follow-up image to be displayed is compensated after, then the image to be displayed after compensating is sent to screen and shows.

Preferably, in step S1, test image intercepts from display screen image to be displayed.

Preferably, step S2 concretely comprises the following steps: screen carries out display according to test image and generates measuring image, stores measuring image, the pixel of the extraction multiple coordinate points of measuring image, and analyzes the synthesis three primary colours of each extraction point.

Preferably, in step S3, when aberration does not exists, then remove the measuring image of storage；In step S4, generate actual measurement chromaticity coordinates according to the measuring image of storage.

Preferably, in step S5, initial color difference coordinates can be obtained by below equation:

Δ₀R_XiYj=R_0XiYj-R'_0XiYj

Δ₀G_XiYj=G_0XiYj-G'_0XiYj

Δ₀B_XiYj=B_0XiYj-B'_0XiYj

Wherein, X_iY_jFor the coordinate of pixel, R_0XiYj、G_0XiYjAnd B_0XiYjIt is respectively target color coordinates pixel X_iY_jRedness, green and blue colour, R'_0XiYj、G'_0XiYjAnd B'_0XiYjIt is respectively actual measurement chromaticity coordinates pixel X_iY_jRedness, green and blue colour, Δ₀R_XiYj、Δ₀G_XiYjAnd Δ₀B_XiYjIt is respectively each pixel X in initial color difference coordinates_iY_jRedness, green and blue colour.

Preferably, in step S6, can be by repeatedly updating test image, it is thus achieved that multiple compared colour difference's coordinates.

Preferably, compared colour difference's coordinate can be obtained by below equation:

Δ_kR_XiYj=R_kXiYj-R'_kXiYj

Δ_kG_XiYj=G_kXiYj-G'_kXiYj

Δ_kB_XiYj=B_kXiYj-B'_kXiYj

Wherein, X_iY_jFor the coordinate of pixel, R_kXiYj、G_kXiYjAnd B_kXiYjIt is respectively the chromaticity coordinates pixel X that kth+1 width test image is corresponding_iY_jRedness, green and blue colour, R'_kXiYj、G'_kXiYjAnd B'_kXiYjIt is respectively the chromaticity coordinates pixel X that kth+1 width measuring image is corresponding_iY_jRedness, green and blue colour, Δ_kR_XiYj、Δ_kG_XiYjAnd Δ_kB_XiYjIt is respectively each pixel X in kth compared colour difference's coordinate_iY_jRedness, green and blue colour.

Preferably, in step S7, inequality coordinate is obtained by below equation:

${\mathrm{\ΔR}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{R}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{R}_{XiYj}}{k+1}$

${\mathrm{\ΔG}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{G}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{G}_{XiYj}}{k+1}$

${\mathrm{\ΔB}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{B}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{B}_{XiYj}}{k+1}$

Wherein, Δ R_XiYj、ΔG_XiYjWith Δ B_XiYjIt is respectively pixel X in inequality coordinate_iY_jRedness, green and blue colour.

Preferably, in step S8, according to below equation, image to be displayed is compensated:

R'_XiYj=R_XiYj-ΔR_XiYj

G'_XiYj=G_XiYj-ΔG_XiYj

B'_XiYj=B_XiYj-ΔB_XiYj

Wherein, R_XiYj、G_XiYjAnd B_XiYjIt is respectively pixel X in image to be displayed_iY_jRedness, green and blue colour；R'_XiYj、G'_XiYjAnd B'_XiYjIt is respectively pixel X in the image to be displayed after compensating_iY_jRedness, green and blue colour.

A kind of display screen chromatic aberration correction method that the present invention proposes, the contrast of test image and measuring image is converted to target color coordinates and the contrast of actual measurement chromaticity coordinates, by location pixel, the three primary colours of pixel are contrasted one by one, abstract image comparison is converted to the colour contrast having as changing, and the beneficially standard of screen display colour difference assessment unitizes.

In the present invention, by original color difference coordinates and at least one compared colour difference's coordinate are asked for inequality coordinate, then according to inequality coordinate, follow-up image to be displayed is carried out Chromatically compensated.So, inequality coordinate and the chromaticity coordinates pixel position one_to_one corresponding of image to be displayed, thus, separate compensation can be carried out according to each pixel in the inequality coordinate chromaticity coordinates to image to be displayed, the accuracy Chromatically compensated to guarantee image to be displayed.

By intercepting, the display screen chromatic aberration correction method that the present invention provides, shows that whole chromatic aberration correction program, as test image, can be set aside to running background, thus not affect client's experience by image, is especially suitable for the moving display screen such as mobile phone, flat board and uses.

Accompanying drawing explanation

Fig. 1 is a kind of display screen chromatic aberration correction method flow diagram that the present invention proposes.

Detailed description of the invention

With reference to Fig. 1, a kind of display screen chromatic aberration correction method that the present invention proposes, comprise the following steps.

S1, according to test image rendering pixel chromaticity coordinates as target color coordinates, pixel chromaticity coordinates carries out record to the synthesis three primary colours of each pixel of screen during display screen display test image.

In this step, pixel is with X_iY_jRepresent, specifically, X_iY_jIn expression measuring image, in X-axis, in the i-th row Y-axis, jth arranges a pixel.Owing to test image is the image to be displayed of screen, so, the size of test image is consistent with screen, pixel X_iY_jCoordinate position position according to screen.In target color coordinates, the most red colour of each pixel three primary colours, green colour and blue colour are expressed as R_XiYj、G_XiYjAnd B_XiYj.I ∈ [1, ∞), j ∈ [1, ∞)

S2, screen carry out display according to test image and generate measuring image, store measuring image, the pixel of the extraction multiple coordinate points of measuring image, and analyze the synthesis three primary colours of each extraction point.In actual measurement chromaticity coordinates, pixel three primary colours colour is expressed as R'_0XiYj、G'_0XiYjAnd B'_0XiYj

In this step, measuring image is screen image, and image size is consistent with test image, and in theory, in the case of screen display no color differnece, the synthesis three primary colours colour of pixel corresponding on measuring image and test image is essentially equal, i.e. R'_0XiYj=R_0XiYj,G'_0XiYj=G_0XiYj,B'_0XiYj=B_0XiYj。

In present embodiment, test image intercepts from display screen image to be displayed, so, can avoid inserting the discontinuous problem of broadcasting pictures that test image causes during display screen shows, the background work pattern for display screen chromatic aberration correction lays the foundation.

In this step, measuring image is stored, beneficially subsequent calls.

S3, the synthesis three primary colours of coordinate points corresponding with target color coordinates for the synthesis three primary colours of extraction point are contrasted, and judge whether aberration exists, there is not then return step S1, exist, carry out step S4.

In this step, predeterminable three primary colours threshold value R_{Threshold value}、G_{Threshold value}And B_{Threshold value}, by three primary colours R' of extraction point_0XiYj、G'_0XiYjAnd B'_0XiYjMake difference with the three primary colours in target color coordinates and obtain Δ₀R_XiYj=R_0XiYj-R'_0XiYj；Δ₀G_XiYj=G_0XiYj-G'_0XiYj；Δ₀B_XiYj=B_0XiYj-B'_0XiYj, then by the absolute value of the difference of acquisition | Δ₀R_XiYj|、|Δ₀G_XiYj| and | Δ₀B_XiYj| respectively with three primary colours threshold value R_{Threshold value}、G_{Threshold value}And B_{Threshold value}Relatively.In present embodiment, it is judged that the condition of screen display needs calibration is: | Δ₀R_XiYj| ＞ R_{Threshold value}Or | Δ₀G_XiYj| ＞ G_{Threshold value}Or | Δ₀B_XiYj| ＞ B_{Threshold value}.Additionally, due to the wavelength of HONGGUANG, green glow, blue light all differs, in present embodiment, R_{Threshold value}≠G_{Threshold value}And R_{Threshold value}≠B_{Threshold value}And G_{Threshold value}≠B_{Threshold value}。

In this step, when aberration does not exists, it may be assumed that | Δ₀R_XiYj|≤R_{Threshold value}And | Δ₀G_XiYj|≤G_{Threshold value}And | Δ₀B_XiYj|≤B_{Threshold value}, then the measuring image of storage is removed, to improve memory space utilization rate.

The pixel chromaticity coordinates of the measuring image that S4, drafting store is as actual measurement chromaticity coordinates.

S5, calculating actual measurement chromaticity coordinates and the value of chromatism of target color coordinates respective coordinates point, and generate initial color difference coordinates.Initial color difference coordinates can be obtained by below equation:

Δ₀R_XiYj=R_0XiYj-R'_0XiYj

Δ₀G_XiYj=G_0XiYj-G'_0XiYj

Δ₀B_XiYj=B_0XiYj-B'_0XiYj

R'_0XiYj、G'_0XiYjAnd B'_0XiYjIt is respectively actual measurement chromaticity coordinates pixel X_iY_jRedness, green and blue colour, Δ₀R_XiYj、Δ₀G_XiYjAnd Δ₀B_XiYjIt is respectively each pixel X in initial color difference coordinates_iY_jRedness, green and blue colour.

S6, renewal test image, and repaint new target color coordinates and new actual measurement chromaticity coordinates according to new test image, calculate new target color coordinates and the value of chromatism of new actual measurement chromaticity coordinates respective coordinates point, generate compared colour difference's coordinate.When being embodied as, in this step, can be by repeatedly updating test image, it is thus achieved that multiple compared colour difference's coordinates, in order to improve the degree of accuracy of chromatic aberration correction.Compared colour difference's coordinate can be obtained by below equation:

Δ_kR_XiYj=R_kXiYj-R'_kXiYj

Δ_kG_XiYj=G_kXiYj-G'_kXiYj

Δ_kB_XiYj=B_kXiYj-B'_kXiYj

Wherein, X_iY_jFor the coordinate of pixel, R_kXiYj、G_kXiYjAnd B_kXiYjIt is respectively the chromaticity coordinates pixel X that kth+1 width test image is corresponding_iY_jRedness, green and blue colour, R'_kXiYj、G'_kXiYjAnd B'_kXiYjIt is respectively the chromaticity coordinates pixel X that kth+1 width measuring image is corresponding_iY_jRedness, green and blue colour, Δ_kR_XiYj、Δ_kG_XiYjAnd Δ_kB_XiYjIt is respectively each pixel X in kth compared colour difference's coordinate_iY_jRedness, green and blue colour.It should be noted that in step S1 and S2, acquisition test image and measuring image are the first width test image and the first width measuring image.

S7, obtaining inequality coordinate according to initial color difference coordinates and compared colour difference's coordinate. inequality coordinate is obtained by below equation:

${\mathrm{\ΔR}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{R}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{R}_{XiYj}}{k+1}$

${\mathrm{\ΔG}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{G}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{G}_{XiYj}}{k+1}$

${\mathrm{\ΔB}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{B}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{B}_{XiYj}}{k+1}$

Wherein, Δ R_XiYj、ΔG_XiYjWith Δ B_XiYjIt is respectively pixel X in inequality coordinate_iY_jRedness, green and blue colour.

S8, according to inequality coordinate, follow-up image to be displayed is compensated after, then the image to be displayed after compensating is sent to screen and shows.

The three primary colours coordinate of the image to be displayed after compensation is respectively as follows:

R'_XiYj=R_XiYj-ΔR_XiYj

G'_XiYj=G_XiYj-ΔG_XiYj

B'_XiYj=B_XiYj-ΔB_XiYj

Wherein, R_XiYj、G_XiYjAnd B_XiYjIt is respectively pixel X in image to be displayed_iY_jRedness, green and blue colour；R'_XiYj、G'_XiYjAnd B'_XiYjIt is respectively pixel X in the image to be displayed after compensating_iY_jRedness, green and blue colour.

In present embodiment, it is thus achieved that after multiple compared colour difference's coordinates, after original color difference coordinates and compared colour difference's coordinate are averaged, image is compensated, be conducive to improving the degree of accuracy of display screen chromatic aberration correction.

The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.

Claims (9)

1. a display screen chromatic aberration correction method, it is characterised in that comprise the following steps:

S1, according to test image rendering pixel chromaticity coordinates as target color coordinates, pixel chromaticity coordinates carries out record to the synthesis three primary colours of each pixel of screen during display screen display test image；

S2, screen carry out display according to test image and generate measuring image, the pixel of the extraction multiple coordinate points of measuring image, and analyze the synthesis three primary colours of each extraction point；

S3, the synthesis three primary colours of coordinate points corresponding with target color coordinates for the synthesis three primary colours of extraction point are contrasted, and judge whether aberration exists, there is not then return step S1, exist, carry out step S4；

S4, draw measuring image pixel chromaticity coordinates as actual measurement chromaticity coordinates；

S5, calculating actual measurement chromaticity coordinates and the value of chromatism of target color coordinates respective coordinates point, and generate initial color difference coordinates；

S6, renewal test image, and repaint new target color coordinates and new actual measurement chromaticity coordinates according to new test image, calculate new target color coordinates and the value of chromatism of new actual measurement chromaticity coordinates respective coordinates point, generate compared colour difference's coordinate；

S7, obtain inequality coordinate according to initial color difference coordinates and compared colour difference's coordinate；

S8, according to inequality coordinate, follow-up image to be displayed is compensated after, then the image to be displayed after compensating is sent to screen and shows.

2. display screen chromatic aberration correction method as claimed in claim 1, it is characterised in that in step S1, test image intercepts from display screen image to be displayed.

3. display screen chromatic aberration correction method as claimed in claim 1, it is characterized in that, step S2 concretely comprises the following steps: screen carries out display according to test image and generates measuring image, stores measuring image, the pixel of the extraction multiple coordinate points of measuring image, and analyze the synthesis three primary colours of each extraction point.

4. display screen chromatic aberration correction method as claimed in claim 3, it is characterised in that in step S3, when aberration does not exists, then remove the measuring image of storage；In step S4, generate actual measurement chromaticity coordinates according to the measuring image of storage.

5. display screen chromatic aberration correction method as claimed in claim 1, it is characterised in that in step S5, initial color difference coordinates can be obtained by below equation:

Δ₀R_XiYj=R_0XiYj-R'_0XiYj

Δ₀G_XiYj=G_0XiYj-G'_0XiYj

Δ₀B_XiYj=B_0XiYj-B'_0XiYj

Wherein, X_iY_jFor the coordinate of pixel, R_0XiYj、G_0XiYjAnd B_0XiYjIt is respectively target color coordinates pixel X_iY_jRedness, green and blue colour, R'_0XiYj、G'_0XiYjAnd B'_0XiYjIt is respectively actual measurement chromaticity coordinates pixel X_iY_jRedness, green and blue colour, Δ₀R_XiYj、Δ₀G_XiYjAnd Δ₀B_XiYjIt is respectively each pixel X in initial color difference coordinates_iY_jRedness, green and blue colour.

6. display screen chromatic aberration correction method as claimed in claim 5, it is characterised in that in step S6, can be by repeatedly updating test image, it is thus achieved that multiple compared colour difference's coordinates.

7. display screen chromatic aberration correction method as claimed in claim 6, it is characterised in that compared colour difference's coordinate can be obtained by below equation:

Δ_kR_XiYj=R_kXiYj-R'_kXiYj

Δ_kG_XiYj=G_kXiYj-G'_kXiYj

Δ_kB_XiYj=B_kXiYj-B'_kXiYj

Wherein, X_iY_jFor the coordinate of pixel, R_kXiYj、G_kXiYjAnd B_kXiYjIt is respectively the chromaticity coordinates pixel X that kth+1 width test image is corresponding_iY_jRedness, green and blue colour, R'_kXiYj、G'_kXiYjAnd B'_kXiYjIt is respectively the chromaticity coordinates pixel X that kth+1 width measuring image is corresponding_iY_jRedness, green and blue colour, Δ_kR_XiYj、Δ_kG_XiYjAnd Δ_kB_XiYjIt is respectively each pixel X in kth compared colour difference's coordinate_iY_jRedness, green and blue colour.

8. display screen chromatic aberration correction method as claimed in claim 7, it is characterised in that in step S7, inequality coordinate is obtained by below equation:

${\mathrm{\ΔR}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{R}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{R}_{XiYj}}{k+1}$

${\mathrm{\ΔG}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{G}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{G}_{XiYj}}{k+1}$

${\mathrm{\ΔB}}_{XiYj}=\frac{{\mathrm{\Δ}}_0{B}_{XiYj}+\underset{k=1}{\Σ}{\mathrm{\Δ}}_k{B}_{XiYj}}{k+1}$

Wherein, Δ R_XiYj、ΔG_XiYjWith Δ B_XiYjIt is respectively pixel X in inequality coordinate_iY_jRedness, green and blue colour.

9. display screen chromatic aberration correction method as claimed in claim 8, it is characterised in that in step S8, according to below equation, image to be displayed is compensated:

R'_XiYj=R_XiYj-ΔR_XiYj

G'_XiYj=G_XiYj-ΔG_XiYj

B'_XiYj=B_XiYj-ΔB_XiYj

Wherein, R_XiYj、G_XiYjAnd B_XiYjIt is respectively pixel X in image to be displayed_iY_jRedness, green and blue colour；R'_XiYj、G'_XiYjAnd B'_XiYjIt is respectively pixel X in the image to be displayed after compensating_iY_jRedness, green and blue colour.