CN100409306C - Method of displaying color for optimizing display device - Google Patents
Method of displaying color for optimizing display device Download PDFInfo
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- CN100409306C CN100409306C CNB2006100601579A CN200610060157A CN100409306C CN 100409306 C CN100409306 C CN 100409306C CN B2006100601579 A CNB2006100601579 A CN B2006100601579A CN 200610060157 A CN200610060157 A CN 200610060157A CN 100409306 C CN100409306 C CN 100409306C
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Abstract
The present invention discloses a method for optimizing display colors of display devices. Six base colors of a display device are respectively adjusted on different brightness levels. The six base colors are composed of three base colors and three primary colors of red, green and blue. The possible saturation distribution regions of each color component of an input signal from 0 to 1.0 are divided into a plurality of mutually independent regions. Different correction coefficients are selected according to the characteristics of a display and associated circuits in each mutually independent region, which avoids losing details of the output high brightness with supersaturation and low saturation. The different correction coefficients form a continuous broken line on the saturation distribution. The present invention carries out the non-linearity adjustment on the saturation of different color components of each pixel according to the correction coefficient of the broken line, outputs the situation that the supersaturation can not occur and can also not lead to the loss of the details of the high brightness with low saturation. The present invention uses four broken lines to approximately carry out the nonlinearity correction, which reduces the operating complexity and optimizes the display colors of display devices.
Description
Technical field
The present invention relates to image processing techniques, be specifically related to a kind of method of optimizing the display color of display device.
Background technology
Along with the development of display technique, the kind of display is more and more, also can be used for the image demonstration of televisor simultaneously, such as LCDTV, and PDPTV, DLPTV adopts the televisor of new display spare, can not show in high quality.This is because most chromatic display is the red, green, blue that is shown different proportion by the three primary colors red, green, blue display unit of additive color mixing, reaches by the characteristic implementation space colour mixture of human eye then that coloured image shows.The input signal that also is display device is the Red Green Blue signal.
In decades, in order to improve quality of TV image, industry is improved " three primary colors " video picture and treatment technology constantly, has obtained very big progress.But in colour TV manufacturing enterprise, because Market competition, often same type need cooperate different display screens, but the characteristic difference of different display screens, such as the color rendering scope difference is just arranged, product has consistent white balance so keep dispatching from the factory, and will carry out adjustment, and the color rendering scope of sacrificing some display screen is to reach the consistance of white balance.All the time, the method that above-mentioned adjustment is adopted all is respectively the Red Green Blue of display device to be adjusted, and realizes by adjusting its corresponding gamma correction curve usually.But because the display device photoelectric characteristic is non-linear, and trichromatic adjustment to problem such as the influence of picture color is not directly perceived, be difficult to not only under brightness at different levels, to obtain accurately color rendering but also take into account whole white balance unanimity, make display device can't reach desirable picture effect.
Chinese patent " method of adjustment of the display color of display device ", publication number 1694155 discloses a kind of method of adjustment of display color of display device, and each pixel branch of received image signal is gone into corresponding brightness degree; Six-basic-color to display device on different brightness degrees is adjusted respectively, described six-basic-color is made up of Red Green Blue and three new primary colours, these three new primary colours are three primary colors to be arranged in pairs or groups respectively in twos according to fixing color matching ratio produce, and are equivalent to two kinds of primary colors of its correspondence are adjusted simultaneously according to described fixed proportion when one of described new primary colours are adjusted.This invention adopts six-basic-color to regulate, owing to increased by three kinds of new primary colours between each primary colors respectively, make display device is being carried out timing, can use new primary colours and regulate for being difficult to judge the employed intermediate color that adopt which kind of primary colors to adjust, the regulative mode of this refinement meets people's visual custom more, and abstract nonlinear curve is regulated become directly perceived and accurate.But the correction coefficient of the saturation degree of each chrominance component on certain luminance plane has only one in this invention, and its bearing calibration is according to correction coefficient the saturation degree of corresponding chrominance component to be carried out linear regulation, as shown in Figure 1.If carry out the correction greater than 1, for the input of high saturation, oversaturated situation can appear in output, such as the BC section, can occur the situation of loss colour detail on the picture, perhaps causes the highlighted loss in detail of low saturation.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of intuitively and effectively the deviation of display device color rendering being adjusted and being compensated.
The technical solution adopted in the present invention is, a kind of method of optimizing the display color of display device, six-basic-color to display device on different brightness degrees is adjusted respectively, described six-basic-color is by red, green, primary colors and three primary colours are formed, these three primary colours are three primary colors to be arranged in pairs or groups respectively in twos according to fixing color matching ratio produce, when one of described new primary colours are adjusted, be equivalent to two kinds of primary colors of its correspondence are adjusted simultaneously according to described fixed proportion, it is characterized in that: possible saturation distribution 0～1.0 interval of each chrominance component of input signal is divided into separate a plurality of intervals; Select different correction coefficient in each described separate interval according to the characteristic of display and interlock circuit, with the supersaturation avoiding exporting and the highlighted loss in detail of low saturation; Described each different correction coefficient forms continuous broken line in the distribution of saturation degree.
Preferably, described separate a plurality of intervals are four.
The saturation degree of each chrominance component that described separate a plurality of intervals are input signals is respectively 0～0.2499,0.2500～0.4999,0.5000～0.7499 and 0.7500～1.0000 four] interval.
Each different correction coefficient of described selection is the interval correction coefficient of setting greater than 1 of low saturation, the interval correction coefficient of setting less than 1 of high saturation.
Adopt technique scheme of the present invention, useful effect is: according to the broken line correction coefficient saturation degree of the different chrominance components of each pixel is carried out non-linear adjusting, even carry out correction greater than 1, input for high saturation, output oversaturated situation can not occur yet, can not cause the highlighted loss in detail of low saturation yet.Carry out gamma correction with four sections piecewise linear approximations, reduced the complicacy of computing, optimized the display color of display device.
Description of drawings
Below in conjunction with embodiment and contrast accompanying drawing, the present invention is described in further detail.
Fig. 1 is the input/output relation synoptic diagram of linear regulation color saturation;
Fig. 2 is a Mang Saier colorimeter system synoptic diagram;
Fig. 3 is that diagram is discussed in Newton color circle and prediction thereof;
Fig. 4 is the input/output relation synoptic diagram that broken line is regulated color saturation;
Fig. 5 is 3D six look Processing Algorithm synoptic diagram of the present invention;
Fig. 6 is the image effect figure that adopts method of the present invention to obtain.
Embodiment
The method of adjustment of the display color of this display device is that each pixel branch of received image signal is gone into corresponding brightness degree, and described brightness degree is divided according to the brightness changing capability of display device, in general can be divided into 64 grades; Six-basic-color to display device on different brightness degrees is adjusted respectively, described six-basic-color is made up of red (R=Red), green (G=Green), blue (B=Blue) three primary colors and three new primary colours, and these three new primary colours are respectively: red, the green yellow (Y=Yellow) that produces according to the ratio collocation that respectively accounts for 50%; Green, the blue cyan (C=Cyan) that produces according to the ratio collocation that respectively accounts for 50%; Red, the blue magenta (M=Magenta) that produces according to the ratio collocation that respectively accounts for 50% is equivalent to two kinds of primary colors of its correspondence are adjusted simultaneously according to described fixed proportion when one of described new primary colours are adjusted.
The principle of color adjustment is: each pixel all includes tone (hue), saturation degree (saturation), three kinds of signals of brightness (brightness), the source of 3D notion that Here it is can be expressed as a point in the Mang Saier colorimeter system (Munsell Color System) as Fig. 2.The longitudinal axis is represented brightness among Fig. 2, can be by dark to showing the score to multistage, and the xsect of each gray scale is a Newton color circle, as shown in Figure 3.To circumference, saturation degree strengthens successively from the center of Newton color circle, and along the circumference of ring, tone changes between Red Green Blue.The relation of various colors and primary colors is deferred to following prediction and is discussed:
1, the colour of the phase line previous generation of two primary colours table is considered to the color mixture of two kinds of primary colours, such as: the green of equivalent and the yellow a of red generation, the yellow saturation degree of this point is lower than the saturation degree of its end points, because the more close central point of this point;
2, red and its complementary colors cyan of equivalent mutually mixing energy obtain white or monochromatic ash, more redness then generates the red or pinkish red of low saturation;
3, the colored c that mix to generate with proper proportion of blueness and spectrum colour b can be considered to sensuously be equal to and the spectrum colour of same hue d be arranged and saturation degree is lower slightly.
As seen from Figure 3, three primary colors have very wide excessive hue regions between separately, being difficult to intuitive judgment for color a kind of and that keep clear of three kinds of primary colors goes out and need reach the purpose that it is adjusted by regulating which kind of primary colors, and increase after the new primary colours, make contrast and selection become more directly perceived and accurate.
In the above-mentioned process that six-basic-color is adjusted respectively, can adopt the method for normal pictures contrast, the normal pictures of selecting enough rich colors details of having of sufficient amount and luminance level for use is as the foundation of adjusting, the image and the normal pictures that show are compared, unfavorable colour on each luminance plane is found out, judge its most approaching any primary colours, then corresponding primary colours are strengthened or weaken, repeat the process of above-mentioned judgement and correction.In actual mechanical process, can adopt earlier conventional R/G/B gamma curve proofread and correct and the white balance adjustment after carry out further colour correction with six-basic-color again.Because above-mentioned adjustment process is the adjusting that becomes more meticulous to color error ratio, therefore can be similar to the operation of each primary colours in the six-basic-color and regard as independently, for example, the enhancing of yellow primary colours or other five kinds of dominant hues of weakening not display frame are exerted an influence, though be actually to red, green two kinds of primary colors carry out the enhancing that degree reduces by half simultaneously or weaken, but on people's visual effect, because the adjusting to primary colors is that degree reduces by half, therefore simple red or near red and simple influence green and nearly green tint almost is difficult for discovering, and only to simple Huang or the nearly yellow color relatively significantly influence that produces, therefore the adjusting of carrying out with this kind method has directly perceived and accurate effect.
The color of selecting to produce by three primary colors equivalent collocation in twos in above-mentioned embodiment is new primary colours, be because they are respectively the complementary colors of three kinds of primary colors: yellow is blue complementary color, cyan is red complementary color, magenta is green complementary color, can visually accomplish and both enrich dull primary colors, make adjustable primary colours contain wide Color Range, with existing primary colors striking contrast and difference are arranged again, make to be more prone to select the primary colours that to adjust.Also can adjust the formation ratio of new primary colours, as long as can meet people's visual custom, it is just passable to play the effect of enriching adjustable integral basis look.Even also can increase new number of primary colors, and but because newly-increased primary colours are the fixed proportion of two kinds of primary colors all the time mixes, it is loaded down with trivial details and chaotic that too much primary colours also can cause adjusting, therefore the number of six kinds of primary colours is comparatively suitable.
The method of adjustment of the color saturation that the present invention improves is to carry out gamma correction, in order to reduce the complicacy of computing, with four sections piecewise linear approximation non-linear correction factors, also is each interval, sets a correction coefficient (being slope) as shown in Figure 4.
How to be divided into four intervals of corresponding different respectively saturation degrees? as shown in Figure 4, between the saturation degree 0～1.0 of each chrominance component of input signal, be divided into four parts, as a preferred embodiment, the average quartern between the saturation degree 0～1.0 of each chrominance component of input signal, promptly 0～0.2499; 0.2500～0.4999; 0.5000～0.7499; 0.7500～1.0000 are respectively an interval.
Selecting the method for the correction coefficient (being slope) of four sections broken lines is that the low saturation interval mainly is the deficiency that is used to compensate display device, setting is greater than 1 correction coefficient (being slope), the high saturation interval mainly is to prevent that supersaturation from appearring in the high saturation input signal, setting is less than 1 correction coefficient (being slope), form four sections continuous broken lines, reach the target of saturation degree being carried out gamma correction, as shown in Figure 4, it is the synoptic diagram of four different correction coefficient, concrete optimal setting is according to the characteristic of display and circuit, by importing typical picture signal, estimate also adjustment repeatedly by image quality adjustment teacher and draw.
As Fig. 5 is 3D six look Processing Algorithm synoptic diagram of the present invention, the brightness that the longitudinal axis is represented by dark to showing the score to multistage, the xsect of each gray scale is a Newton color circle, the plane of each Newton color circle is divided into four parts with concentric circles again, adjusts color saturation with different correction coefficient in center circle and each annulus.
Adopt after the method for the present invention, the picture quality of display is improved, some colours (such as the blueness of sky, the green on meadow or the like) that allow the people produce aesthetic feeling can be strengthened, can improve the deficiency of display device itself, according to consumer's colored preference the colour of picture is modified simultaneously, and, input for high saturation, prevent that oversaturated situation from can appear in output, like this, the colour of picture has obtained strengthening and modifying, and can not occur losing the situation of colour detail or the highlighted loss in detail of low saturation on the picture again.According to crowd's contrast Blind Test, color opinion rating average energy improves 1.2 grades.
As shown in Figure 6, original image is the picture of a width of cloth blue sky and white cloud, adopts after the six-basic-color adjustment of control methods, and the blueness of sky strengthens, and demonstrates more gay colours on display; After adopting method of the present invention to adjust, the details that can see more white clouds, the blueness of sky strengthens, and the details of white clouds keeps.
Claims (4)
1. method of optimizing the display color of display device, six-basic-color to display device on different brightness degrees is adjusted respectively, described six-basic-color is made up of Red Green Blue and three new primary colours, these three new primary colours are three primary colors to be arranged in pairs or groups respectively in twos according to fixing color matching ratio produce, when one of described new primary colours are adjusted, be equivalent to two kinds of primary colors of its correspondence are adjusted simultaneously according to described fixing color matching ratio, it is characterized in that:
Possible saturation distribution 0～1.0 interval of each chrominance component of input signal is divided into separate a plurality of intervals;
Select different correction coefficient in each described separate interval according to the characteristic of display and interlock circuit, with the supersaturation avoiding exporting and the highlighted loss in detail of low saturation;
Described each different correction coefficient forms continuous broken line in the distribution of saturation degree.
2. the method for the display color of optimization display device as claimed in claim 1 is characterized in that:
Described separate a plurality of intervals are four.
3. the method for the display color of optimization display device as claimed in claim 1 or 2 is characterized in that:
Described separate a plurality of intervals are: the saturation degree of each chrominance component of input signal is respectively four intervals of 0～0.2499,0.2500～0.4999,0.5000～0.7499 and 0.7500～1.00000.
4. the method for the display color of optimization display device as claimed in claim 3 is characterized in that:
The different correction coefficient of described selection is: in the interval correction coefficient of setting greater than 1 of low saturation, in the interval correction coefficient of setting less than 1 of high saturation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100601579A CN100409306C (en) | 2006-03-31 | 2006-03-31 | Method of displaying color for optimizing display device |
| HK07105864A HK1098567A1 (en) | 2006-03-31 | 2007-06-04 | Method for optimizing the color of display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100601579A CN100409306C (en) | 2006-03-31 | 2006-03-31 | Method of displaying color for optimizing display device |
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| CN1873771A CN1873771A (en) | 2006-12-06 |
| CN100409306C true CN100409306C (en) | 2008-08-06 |
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| CNB2006100601579A Expired - Fee Related CN100409306C (en) | 2006-03-31 | 2006-03-31 | Method of displaying color for optimizing display device |
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| HK (1) | HK1098567A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI510101B (en) | 2013-09-12 | 2015-11-21 | Au Optronics Corp | Method for adjusting saturation degree and color adjusting system |
| CN107111993A (en) * | 2015-01-09 | 2017-08-29 | 夏普株式会社 | The control method of liquid crystal display device, liquid crystal display device |
| CN107863060B (en) * | 2017-11-28 | 2021-03-05 | 海信视像科技股份有限公司 | Method and device for correcting image color |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6262744B1 (en) * | 1996-05-07 | 2001-07-17 | Barco N.V. | Wide gamut display driver |
| CN1617168A (en) * | 2003-11-13 | 2005-05-18 | 瑞昱半导体股份有限公司 | Chroma regulating method |
| CN1658678A (en) * | 2004-02-19 | 2005-08-24 | 索尼公司 | Image processing apparatus and image processing method |
| CN1694542A (en) * | 2005-01-17 | 2005-11-09 | 深圳创维－Rgb电子有限公司 | Conversion method for colour like of television picture |
| CN1694155A (en) * | 2005-01-17 | 2005-11-09 | 深圳创维－Rgb电子有限公司 | Method for regulating display color of display device |
| WO2005109854A1 (en) * | 2004-05-11 | 2005-11-17 | Koninklijke Philips Electronics N.V. | Method for processing color image data |
-
2006
- 2006-03-31 CN CNB2006100601579A patent/CN100409306C/en not_active Expired - Fee Related
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2007
- 2007-06-04 HK HK07105864A patent/HK1098567A1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6262744B1 (en) * | 1996-05-07 | 2001-07-17 | Barco N.V. | Wide gamut display driver |
| CN1617168A (en) * | 2003-11-13 | 2005-05-18 | 瑞昱半导体股份有限公司 | Chroma regulating method |
| CN1658678A (en) * | 2004-02-19 | 2005-08-24 | 索尼公司 | Image processing apparatus and image processing method |
| WO2005109854A1 (en) * | 2004-05-11 | 2005-11-17 | Koninklijke Philips Electronics N.V. | Method for processing color image data |
| CN1694542A (en) * | 2005-01-17 | 2005-11-09 | 深圳创维－Rgb电子有限公司 | Conversion method for colour like of television picture |
| CN1694155A (en) * | 2005-01-17 | 2005-11-09 | 深圳创维－Rgb电子有限公司 | Method for regulating display color of display device |
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| Publication number | Publication date |
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| CN1873771A (en) | 2006-12-06 |
| HK1098567A1 (en) | 2007-07-20 |
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