CN106887218B - Color conditioning method and regulating system based on high color gamut display - Google Patents
Color conditioning method and regulating system based on high color gamut display Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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Abstract
The present invention provides a kind of color conditioning methods based on high color gamut display, include the following steps: S1, a RGB input signal is converted to HSV color space by rgb color space；It is S2, HSV color space HSV gamut area represented in gamut map and rgb color space RGB color domain area represented in gamut map is Chong Die, in HSV gamut area beyond being partially adjusted, the H ' S ' V ' color space after being adjusted；S3, it is exported after H ' S ' V ' color space adjusted is converted to R ' G ' B ' color space.The present invention also provides a kind of color adjustment systems, comprising: conversion module, compression module.Compared with prior art, it realizes under the premise of high color gamut display is beautiful in colour, color can embody real-world object color.
Description
Technical field
The present invention relates to a kind of field of display technology, especially a kind of saturation degree adjusting method based on high color gamut display
And regulating system.
Background technique
Current high colour gamut shows the development trend for having become LCD TV, but since usual LCD display is to pass through tune
The brightness of RGB three primary colours is saved to realize full-color display, usually it shows that colour gamut is triangle area.With the high colour gamut such as quantum dot
The appearance of technology, displayable colour gamut are higher and higher.Come according to the gamut standards BT.2020 that current International Telecommunication Union is recommended
It sees, gamut area greatly increases the color for having exceeded real-world object color, so while the display gamut area of display can be with
Reach the gamut area of BT.2020, but the color due to exceeding real-world object color part, human eye appears to excessively bright-coloured and becomes
Now not enough " true "；How this false part colours to be become and confirm object color, being one is worth research
Project.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides a kind of color conditioning method and tune based on high color gamut display
Section system, to can guarantee the purpose of real colour while high color gamut display is beautiful in colour.
The present invention provides a kind of color conditioning methods based on high color gamut display, include the following steps:
Step S1, a RGB input signal is converted into HSV color space by rgb color space；
Step S2, by HSV color space, HSV gamut area represented in gamut map and rgb color space are in colour gamut
Represented RGB color domain area overlapping in figure carries out the colour gamut for exceeding RGB color domain area in HSV gamut area beyond part
Adjustment, is completely disposed at HSV gamut area in the range of the area of RGB color domain, the H ' S ' V ' color space after being adjusted；
Step S3, it is exported after H ' S ' V ' color space adjusted being converted to R ' G ' B ' color space.
Further, in the step S2 HSV gamut area by the way that each point of the HSV color space in chromatic diagram is connected
It is formed；RGB color domain area is by the way that by rgb color space, the point of RGB three primary colours position is connected to form in chromatic diagram.
Further, the colour gamut for exceeding RGB color domain area in HSV gamut area is carried out beyond part in the step S2
It is adjusted to be adjusted the color saturation S in HSV color space, tone H and brightness V are remained unchanged, to be adjusted
H ' S ' V ' color space after whole.
Further, the color saturation S in HSV color space, which is adjusted, includes:
With the red in RGB color domain for starting point, using white as the center of circle, rotated a circle counterclockwise by HSV gamut area and RGB color
6 points, starting point and the center of circle of domain area intersection are respectively defined as B, C, D, E, F, G, A, W and each point are connected with the center of circle, lead to
It crosses and is compared the angle between the angle of the tone H in HSV color space and A point and 6 points, color is full after being adjusted
With the value of degree S '.
Further, color saturation S ' value obtains in the following manner after the adjustment:
As 0 °≤H≤∠ AWB；S '=F1 × S；H '=H, V '=V；
As ∠ AWB < H < ∠ AWC；S '=S；H '=H, V '=V；
As ∠ AWC≤H≤∠ AWD；S '=F2 × S；H '=H, V '=V；
As ∠ AWD < H < ∠ AWE；S '=S；H '=H, V '=V；
As ∠ AWE≤H≤∠ AWF；S '=F3 × S；H '=H, V '=V；
As ∠ AWF < H < ∠ AWG；S '=S；H '=H, V '=V；
When GWA≤H≤360 ° ∠；S '=F4 × S；H '=H, V '=V；
Described F1, F2, F3 and F4 meet: F=f (H)=aH5+bH4+cH3+dH2+ eH+f, wherein a, b, c, d, e, f are normal
Number, is fitted to obtain by numerical function.
The present invention also provides a kind of color adjustment system based on high color gamut display, color adjustment system includes:
Conversion module, for a RGB input signal to be converted to HSV color space by rgb color space or by H ' S ' V '
Color space exports after being converted to rgb color space；
Compression module, for by HSV gamut area of the HSV color space in chromatic diagram and rgb color space in coloration
RGB color domain area overlapping in figure, the colour gamut for exceeding RGB color domain area in HSV gamut area is adjusted beyond part, is made
HSV gamut area is completely disposed in the range of the area of RGB color domain, and H ' S ' V ' color space adjusted is sent to modulus of conversion
Block.
Further, the HSV gamut area is by the way that each point of the HSV color space in chromatic diagram to be connected to form；Institute
RGB color domain area is stated by the way that the point of RGB three primary colours position is connected to form in chromatic diagram by rgb color space.
Further, described be adjusted to the colour gamut for exceeding RGB color domain area in HSV gamut area beyond part is right
Color saturation S in HSV color space is adjusted, and tone H and brightness V are remained unchanged, to obtain H ' adjusted
S ' V ' color space.
Further, the color saturation S in HSV color space, which is adjusted, includes:
With the red in RGB color domain for starting point, using white as the center of circle, rotated a circle counterclockwise by HSV gamut area and RGB color
6 points, starting point and the center of circle of domain area intersection are respectively defined as B, C, D, E, F, G, A, W and each point are connected with the center of circle, lead to
It crosses and is compared the angle between the angle of the tone H in HSV color space and A point and 6 points, color is full after being adjusted
With the value of degree S '.
Further, color saturation S ' value obtains in the following manner after the adjustment:
As 0 °≤H≤∠ AWB；S '=F1 × S；H '=H, V '=V；
As ∠ AWB < H < ∠ AWC；S '=S；H '=H, V '=V；
As ∠ AWC≤H≤∠ AWD；S '=F2 × S；H '=H, V '=V；
As ∠ AWD < H < ∠ AWE；S '=S；H '=H, V '=V；
As ∠ AWE≤H≤∠ AWF；S '=F3 × S；H '=H, V '=V；
As ∠ AWF < H < ∠ AWG；S '=S；H '=H, V '=V；
When GWA≤H≤360 ° ∠；S '=F4 × S；H '=H, V '=V；
Described F1, F2, F3 and F4 meet: F=f (H)=aH5+bH4+cH3+dH2+ eH+f, wherein a, b, c, d, e, f are normal
Number, is fitted to obtain by numerical function.
Compared with prior art, the present invention empty to HSV color after HSV color space by being converted to rgb color space
Between in corresponding HSV gamut area the colour gamut beyond RGB color domain area corresponding to rgb color space adjusted beyond part
It is whole, it is integrally placed at HSV gamut area in the area of RGB color domain, realizes color under the premise of high color gamut display is beautiful in colour
Real-world object color can be embodied.
Detailed description of the invention
Fig. 1 is the flow chart of color conditioning method of the invention；
Fig. 2 is the structural block diagram of color adjustment system of the invention；
Fig. 3 is the schematic diagram after HSV gamut area of the present invention is Chong Die with RGB color domain area；
Fig. 4 is that the present invention carries out compressed schematic diagram to HSV gamut area；
Fig. 5 is the pass of the S ' after the tone of the invention compressed to the color saturation in HSV color space and adjusting
System's figure.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of color conditioning method based on high color gamut display of the invention, includes the following steps:
Step S1, a RGB input signal is converted into HSV color space by rgb color space；
Step S2, by HSV color space, HSV gamut area represented in gamut map and rgb color space are in colour gamut
Represented RGB color domain area overlapping in figure carries out the colour gamut for exceeding RGB color domain area in HSV gamut area beyond part
Adjustment, makes HSV gamut area be completely disposed at the H ' S ' V ' color in the range of the area of RGB color domain (shown in Fig. 4), after being adjusted
Space；
Step S3, it is exported after H ' S ' V ' color space adjusted being converted to R ' G ' B ' color space.
Rgb color space is converted to HSV color space and is realized using existing conversion method in step S1, specifically:
Wherein the acquisition of H (tone) is calculated by following:
Wherein, θ is calculated by following formula in formula (1):
R, G, B R, G, B three primary colours distinguish normalized grayscale value in the formula (2)；
The acquisition of S (saturation degree) is calculated by following:
Δ is calculated by the following formula to obtain in formula (3):
Δ=max (R1,G1,B1)-min(R1,G1,B1) (4)
It is described
Wherein R, G, B R, G, B three primary colours distinguish normalized grayscale value；
The acquisition of V (brightness) is calculated by following:
V=max (R1,G1,B1) (5)
It is described
Wherein R, G, B R, G, B three primary colours distinguish normalized grayscale value.
As shown in figure 3, HSV gamut area is by the way that each point of the HSV color space in chromatic diagram to be connected in step s 2
It is formed；RGB color domain area by the way that by rgb color space, the point of RGB three primary colours position is connected to form in chromatic diagram,
The shape of RBG colour gamut is triangle.
The colour gamut for exceeding RGB color domain area in HSV gamut area is adjusted beyond part as in HSV color space
Color saturation S be adjusted, tone H and brightness V are remained unchanged, to obtain H ' S ' V ' color space adjusted.
The formula of HSV color space is converted by above-mentioned rgb color space, in the anti-form pushed away by H ' adjusted
S ' V ' color space is converted to the input signal of R ' G ' B ' color space, to obtain beautiful in colour but distortionless picture.
As shown in Fig. 2, a kind of color adjustment system based on high color gamut display, the color adjustment system include:
Conversion module, for a RGB input signal to be converted to HSV color space by rgb color space or by H ' S ' V '
Color space exports after being converted to R ' G ' B ' color space；
Compression module, for by HSV gamut area of the HSV color space in chromatic diagram and rgb color space in coloration
RGB color domain area overlapping in figure, the colour gamut for exceeding RGB color domain area in HSV gamut area is adjusted beyond part, is made
HSV gamut area is completely disposed in the range of the area of RGB color domain, and H ' S ' V ' color space adjusted is sent to modulus of conversion
Block, specifically, HSV gamut area is by the way that each point of the HSV color space in chromatic diagram to be connected to form；RGB color domain face
By the way that by rgb color space, the point of RGB three primary colours position is connected to form in chromatic diagram, the shape in RGB color domain is product
Triangle.
Compression module is adjusted specially pair the colour gamut for exceeding RGB color domain area in HSV gamut area beyond part
Color saturation S in HSV color space is adjusted, and tone H and brightness V are remained unchanged, to obtain H ' adjusted
S ' V ' color space.
The color saturation S in HSV color space is adjusted in the present invention and is realized with the following method:
As shown in figure 3, using white as the center of circle, being rotated a circle counterclockwise by HSV colour gamut with the red in RGB color domain for starting point
6 points, starting point and the center of circle that area intersects with RGB color domain area be respectively defined as B, C, D, E, F, G, A, W and by each point with
The center of circle is connected, and by the way that the angle between the angle of the tone H in HSV color space and A point and 6 points to be compared, obtains
The value of color saturation S ' after adjustment.
Due to the present invention is directed high color gamut display, HSV gamut area mutually intersect shape with RGB color domain area
At 6 intersection points.
As shown in figure 5, for the fit correlation figure of the compression function of color saturation S ' after tone H and adjustment, according in Fig. 3
Eight points of B, C, D, E, F, G, A, W of acquisition, since A point (tone H=0), the intersection point P of A point and W point and real-world object color can
With determination, the compression function F=WA/WP of available A point is similarly sequentially adjusted in color dot position, available tone H from 0 to
The corresponding compression function value of ∠ AWB passes through the available function expression of fitting of multiple square function: F=f (H)=aH5+bH4+
cH3+dH2+eH+f。
The value of color saturation S ' has following 7 kinds of situations after adjusting in the present invention, is respectively as follows:
1, as 0 °≤H≤∠ AWB；S '=F1 × S；H '=H, V '=V；
2, as ∠ AWB < H < ∠ AWC；S '=S；H '=H, V '=V；
3, as ∠ AWC≤H≤∠ AWD；S '=F2 × S；H '=H, V '=V；
4, as ∠ AWD < H < ∠ AWE；S '=S；H '=H, V '=V；
5, as ∠ AWE≤H≤∠ AWF；S '=F3 × S；H '=H, V '=V；
6, as ∠ AWF < H < ∠ AWG；S '=S；H '=H, V '=V；
7, when GWA≤H≤360 ° ∠；S '=F4 × S；H '=H, V '=V；
Described F1, F2, F3 and F4 meet: F=f (H)=aH5+bH4+cH3+dH2+ eH+f, wherein a, b, c, d, e, f are normal
Number, can be fitted to obtain by numerical function.
For example tone H is normalized in we, obtains tone=0, B point H=0.060617 of A point；C point tone=
0.185185, D point H=0.4166667, E point H=0.581854, F point H=0.757576, G point H=0.860508；
It is available and by substituted into above-mentioned 7 kinds of situations by being fitted:
1,0 °≤H≤∠ AWB, wherein ∠ AWB=0.060617；So value of F1 are as follows:
F1=7166315.71813965*h^5-1124804.61575317*h^4+59806.60863 01803*h^3-
1178.1637178212*h^2+9.5874067085*h+0.7484364775 the value of F1 is finally obtained, to obtain S '=F1
×S；H '=H, V '=V；
2, ∠ AWB < H < ∠ AWC, wherein as ∠ AWB=0.060617, ∠ AWC=0.185185；So S '=S；H'
=H, V '=V；
3, ∠ AWC≤H≤∠ AWD, wherein as ∠ AWC=0.185185, ∠ AWD=0.4166667；So
F2=-226.8330348*h^4+353.5082393*h^3-179.9344453*h^2+35.9 70329*h-
1.4771837, the value of F2 is finally obtained, to obtain S '=F2 × S；H '=H, V '=V；
4, ∠ AWD < H < ∠ AWE, wherein as ∠ AWD=0.4166667, ∠ AWE=0.581854；So S '=S；
H '=H, V '=V；
5, ∠ AWE≤H≤∠ AWF, wherein as ∠ AWE=0.581854, ∠ AWF=0.757576；So value of F3
Are as follows:
F3=-23966.8572303*h^5+79633.2994006*h^4-105634.5888261*h ^3+
69954.7901649*h^2-23136.4375137*h+3059.3124787, finally obtains the value of F3, to obtain S '=F3
×S；H '=H, V '=V；
6, ∠ AWF < H < ∠ AWG, wherein as ∠ AWF=0.757576, ∠ AWG=0.860508；So S '=S；H'
=H, V '=V；
7、∠GWA≤H≤360°, wherein as ∠ GWA=0.860508,360 ° are represented as 1；So the value of F4 is F4=
92.87857*h^3-248.08727*h^2+218.21275*h-62.25236 the value of F4 is finally obtained, to obtain S '=F4
×S；H '=H, V '=V.
It is formed as shown in figure 4, figure intermediate cam shape is connected by the point of RGB three primary colours position in rgb color space,
For the colour gamut of real-world object color, filling grey parts are that HSV color space is excessively bright-coloured to the colour gamut of the real-world object color in figure,
Having had exceeded really is that object color should have color, by the above method, display is exceeded the part colours of real-world object color
It is compressed in the colour gamut of real-world object color, to realize that high color gamut display is gorgeous and true purpose.
Although the present invention has shown and described referring to specific embodiment, it should be appreciated by those skilled in the art that:
In the case where not departing from the spirit and scope of the present invention being defined by the claims and their equivalents, can carry out herein form and
Various change in details.
Claims (6)
1. a kind of color conditioning method based on high color gamut display, characterized by the following steps:
Step S1, a RGB input signal is converted into HSV color space by rgb color space；
Step S2, by HSV color space, HSV gamut area represented in gamut map and rgb color space are in gamut map
Represented RGB color domain area overlapping, the colour gamut for exceeding RGB color domain area in HSV gamut area is adjusted beyond part,
It is completely disposed at HSV gamut area in the range of the area of RGB color domain, the H ' S ' V ' color space after being adjusted；
Step S3, it is exported after H ' S ' V ' color space adjusted being converted to R ' G ' B ' color space；
The colour gamut for exceeding RGB color domain area in HSV gamut area is adjusted beyond part as to HSV color in the step S2
Color saturation S in color space is adjusted, and tone H and brightness V are remained unchanged, to obtain H ' S ' V ' color adjusted
Color space；
The color saturation S in HSV color space, which is adjusted, includes:
With the red in RGB color domain for starting point, using white as the center of circle, rotated a circle counterclockwise by HSV gamut area and RGB color domain face
Product intersection 6 points, starting point and the center of circle be respectively defined as B, C, D, E, F, G, A, W and each point be connected with the center of circle, pass through by
Angle between the angle of tone H in HSV color space and A point and 6 points is compared, color saturation after being adjusted
The value of S '.
2. the color conditioning method according to claim 1 based on high color gamut display, it is characterised in that: the step S2
Middle HSV gamut area is by the way that each point of the HSV color space in chromatic diagram to be connected to form；RGB color domain area pass through by
Rgb color space point of RGB three primary colours position in chromatic diagram is connected to form.
3. the color conditioning method according to claim 1 based on high color gamut display, it is characterised in that:
Color saturation S ' value obtains in the following manner after the adjustment:
As 0 °≤H≤∠ AWB；S '=F1 × S；H '=H, V '=V；
As ∠ AWB < H < ∠ AWC；S '=S；H '=H, V '=V；
As ∠ AWC≤H≤∠ AWD；S '=F2 × S；H '=H, V '=V；
As ∠ AWD < H < ∠ AWE；S '=S；H '=H, V '=V；
As ∠ AWE≤H≤∠ AWF；S '=F3 × S；H '=H, V '=V；
As ∠ AWF < H < ∠ AWG；S '=S；H '=H, V '=V；
When GWA≤H≤360 ° ∠；S '=F4 × S；H '=H, V '=V；
Described F1, F2, F3 and F4 meet: F=f (H)=aH5+bH4+cH3+dH2+ eH+f, wherein a, b, c, d, e, f are constant, are led to
Numerical function is crossed to be fitted to obtain.
4. a kind of color adjustment system based on high color gamut display, it is characterised in that: color adjustment system includes:
Conversion module, for a RGB input signal to be converted to HSV color space by rgb color space or by H ' S ' V ' color
Space exports after being converted to rgb color space；
Compression module, for by HSV gamut area of the HSV color space in chromatic diagram and rgb color space in chromatic diagram
RGB color domain area overlapping, in HSV gamut area exceed RGB color domain area colour gamut beyond part be adjusted, make HSV
Gamut area is completely disposed in the range of the area of RGB color domain, and H ' S ' V ' color space adjusted is sent to conversion module；
It is described that the colour gamut for exceeding RGB color domain area in HSV gamut area is adjusted beyond part as in HSV color space
Color saturation S be adjusted, tone H and brightness V are remained unchanged, to obtain H ' S ' V ' color space adjusted；
The color saturation S in HSV color space, which is adjusted, includes:
With the red in RGB color domain for starting point, using white as the center of circle, rotated a circle counterclockwise by HSV gamut area and RGB color domain face
Product intersection 6 points, starting point and the center of circle be respectively defined as B, C, D, E, F, G, A, W and each point be connected with the center of circle, pass through by
Angle between the angle of tone H in HSV color space and A point and 6 points is compared, color saturation after being adjusted
The value of S '.
5. the color adjustment system according to claim 4 based on high color gamut display, it is characterised in that: the HSV color
Domain area is by the way that each point of the HSV color space in chromatic diagram to be connected to form；RGB color domain area is by by rgb color
Space point of RGB three primary colours position in chromatic diagram is connected to form.
6. the color adjustment system according to claim 4 based on high color gamut display, it is characterised in that:
Color saturation S ' value obtains in the following manner after the adjustment:
As 0 °≤H≤∠ AWB；S '=F1 × S；H '=H, V '=V；
As ∠ AWB < H < ∠ AWC；S '=S；H '=H, V '=V；
As ∠ AWC≤H≤∠ AWD；S '=F2 × S；H '=H, V '=V；
As ∠ AWD < H < ∠ AWE；S '=S；H '=H, V '=V；
As ∠ AWE≤H≤∠ AWF；S '=F3 × S；H '=H, V '=V；
As ∠ AWF < H < ∠ AWG；S '=S；H '=H, V '=V；
When GWA≤H≤360 ° ∠；S '=F4 × S；H '=H, V '=V；
Described F1, F2, F3 and F4 meet: F=f (H)=aH5+bH4+cH3+dH2+ eH+f, wherein a, b, c, d, e, f are constant, are led to
Numerical function is crossed to be fitted to obtain.
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| CN108024110B (en) * | 2017-12-15 | 2019-06-21 | 四川长虹电器股份有限公司 | A kind of color adjustment method of high colour gamut LCD TV |
| CN108280813A (en) * | 2018-01-30 | 2018-07-13 | 努比亚技术有限公司 | A kind of image processing method, terminal and computer readable storage medium |
| CN109671399B (en) * | 2018-12-11 | 2020-08-18 | 惠科股份有限公司 | Driving method and driving system of display module and display device |
| CN110855970B (en) * | 2019-11-27 | 2022-04-01 | 上海富瀚微电子股份有限公司 | Image saturation processing method and device |
| CN111079637B (en) * | 2019-12-12 | 2023-09-08 | 武汉轻工大学 | Method, device, equipment and storage medium for segmenting rape flowers in field image |
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| CN101866641A (en) * | 2010-03-09 | 2010-10-20 | 华映视讯（吴江）有限公司 | The color adjustment method of image |
| CN103248793A (en) * | 2013-05-14 | 2013-08-14 | 旭曜科技股份有限公司 | Skin tone optimization method and device for color gamut transformation system |
| CN103780797A (en) * | 2014-01-23 | 2014-05-07 | 北京京东方光电科技有限公司 | Image color enhancement method and device |
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