CN101527136B - Sectional generating method of display chroma curve - Google Patents

Sectional generating method of display chroma curve Download PDF

Info

Publication number
CN101527136B
CN101527136B CN2009100828213A CN200910082821A CN101527136B CN 101527136 B CN101527136 B CN 101527136B CN 2009100828213 A CN2009100828213 A CN 2009100828213A CN 200910082821 A CN200910082821 A CN 200910082821A CN 101527136 B CN101527136 B CN 101527136B
Authority
CN
China
Prior art keywords
display
curve
chroma
target
chroma curve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2009100828213A
Other languages
Chinese (zh)
Other versions
CN101527136A (en
Inventor
黄际雷
杨德文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN2009100828213A priority Critical patent/CN101527136B/en
Publication of CN101527136A publication Critical patent/CN101527136A/en
Application granted granted Critical
Publication of CN101527136B publication Critical patent/CN101527136B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

The invention discloses a sectional generating method of display chroma curve, which comprises the steps as follows: the display divides entire gray scale into three sections according to corresponding chromaticity coordinates in non-corrected color temperature status, wherein, the first section and the last section are curve sections and the middle section is a straight line section; the middle section is corresponding to target chromaticity coordinates relative to target color temperature to be corrected by corresponding displays; chroma curve values of scales are then calculated by fitting equation and the chroma curve value is used to complete comparison with characteristic chroma curve value of the display, thereby calculating a correction table and correcting the display. A target chroma curve generated by the method is flat, precise and free of obvious inflexion points; the middle straight line section uses color temperature of the target display to calculate target chromatic value, so as to realize correction process of target chroma curve of the display on the basis of satisfying different color temperature requirements of various operators to the display. Therefore, the sectional generating method is applicable to generation and other applications of target chroma curves of various displays.

Description

The sectional generating method of display chroma curve
Technical field
The present invention relates to a kind of generation method of display chroma curve, the sectional generating method of the display chroma curve that particularly a kind of flex point is level and smooth.
Background technology
On display, the curve that constitutes after all shown chromatic values of the GTG of different brackets interconnect from low to high is a chroma curve, usually, the GTG figure place that can show according to the display capabilities of display just can be measured all chroma datas on each rank with color analysis instrument.Wherein, can react use to need, the pairing chroma curve of display effect is exactly the target chroma curve, measuring without the resulting chroma curve of the display of overcorrect is the feature chroma curve.And the demonstration tone of display is by the decision of the demonstration chromatic value of display, represents with colour temperature that usually colour temperature is a warm tones when low, and is promptly red partially, is cool tone when colour temperature is high, i.e. indigo plant partially.The tone orientation that display technique shows image in the application of different industries, different regions or different user is also different, so the especially professional display of display need pass through color temperature correction, could satisfy user's requirement.With the contrast of target chroma curve and feature chroma curve and calculate table of corrections and write display, display is proofreaied and correct with this table of corrections and is shown and then just can obtain desired display effect.How the display chroma curve that obtains desired display effect by color temperature correction just becomes the problem to be solved in the present invention.
Summary of the invention
The segmentation and the level and smooth effective generation method of flex point that the purpose of this invention is to provide a kind of chroma curve, this method can provide effective aim colour line of writing music for the chromaticity correction of display.
The present invention realizes by following steps:
A kind of sectional generating method of display chroma curve may further comprise the steps:
1) display is arranged on not correcting colour temperature state, and full GTG is divided into three sections by the chromaticity coordinate of correspondence: first section and latter end are segment of curve, and interlude is a straight-line segment, the interlude correspondence be the pairing target chromaticity coordinate of target colour temperature that display will be proofreaied and correct;
2) calculate the chroma curve value on each rank on first, the latter end according to fit equation;
3) whether merge each section chroma curve value and constitute target chroma curve value, go out the colour temperature curve data by the chroma curve data computation, it is mild to observe the chroma curve transition, otherwise, adjust parameter and recomputate target chroma curve value;
4) with the feature chroma curve value contrast of target chroma curve value and display, the calculation correction table is proofreaied and correct display.
Described step 1) specifically comprises:
A) display is arranged on the state of not proofreading and correct colour temperature, measures the full black burst of input of display or the black chromaticity coordinate (x of black window signal k, y k) and the white chromaticity coordinate (x of complete white field signal of input or white window signal w, y w);
B) determine the target colour temperature that display will be proofreaied and correct, calculate the target chromaticity coordinate (x of target colour temperature correspondence s, y s);
C) determine the GTG exponent number L of display;
D) the pairing chromaticity coordinate of full GTG is divided into three sections: 0～L L～L H～(L-1),
0～L LHeaded by the section be (x k, y k) change to (x s, y s) curve;
L L～L HFor interlude is constant chromaticity (x s, y s);
L H～(L-1) be (x for latter end s, y s) change to (x w, y w) curve.
Described L LBe the arbitrary integer between 20～50, L HIt is the arbitrary integer between 160～200.
Described L=2 8=256 or L=2 10=1024.
Described step 2) the first section fit equation formula with latter end is identical in.
First section fit equation:
x i = x k - ( x k - x s ) × ( i / L L ) P L , y i = y k - ( y k - y s ) × ( i / L L ) P L
P L＝P L0-(P L0-P L1)×i/L L
Wherein i be 0,1,2......L L, (x i, y i) be the chromaticity coordinate of match, P L0And P L1Be arbitrary parameter; The latter end fit equation:
x i = x s - ( x s - x k ) × ( i / L L ) P H , y i = y s - ( y s - y k ) × [ ( i - L H ) / ( L - 1 - L H ) ] P H
P H＝P H0-(P H0-P H1)×(i-L H)/(L-1-L H)
Wherein i is L H, (L H+ 1), (L H+ 2) ... (L-1), (x i, y i) be the chromaticity coordinate of match, P H0And P H1Be arbitrary parameter.
Described P L0=1.0, P L1=0.1, P H0=2, P H1=0.5.
Adjustable parameter comprises in the described step 3): P L0And P L1, P H0And P H1Perhaps L LAnd L H
The mode that the present invention adopts segmentation to generate the target chroma curve is carried out the trimming process of display, and specifically by finish the trimming process of display after head, the last segment of curve match with the middle straight line segment, fit equation first, that latter end uses is identical.Mild, accurate according to the target chroma curve that this method generates, obvious flex point does not appear, the middle straight line segment calculates the target chromatic value with the target indicator colour temperature, satisfied under the prerequisite of different operating person to the requirement of display different-colour, realized target chroma curve trimming process to display, be applicable to the generation of the target chroma curve of various displays, also be applicable to other application of this curve.
Description of drawings
Fig. 1 is the flow chart of steps of the sectional generating method of display chroma curve of the present invention;
Fig. 2 is the colourity x curve map that generates according to inventive method;
Fig. 3 is the chromaticity y curve map that generates according to inventive method;
Fig. 4 is the colour temperature Tc curve map that generates according to inventive method.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, the sectional generating method of display chroma curve of the present invention, concrete steps are as follows:
Step 10: display is arranged on the state of not proofreading and correct colour temperature, measures the black chromaticity coordinate (x that display is imported full black burst k, y k) and the complete white chromaticity coordinate (x of field signal in vain of input w, y w);
Step 11: determine the target colour temperature that display will be proofreaied and correct, calculate pairing target chromaticity coordinate (x according to the target colour temperature s, y s), such as the chromaticity coordinate (x of 9300k s, y s) be the chromaticity coordinate (x of (0.283,0.297), 7500k s, y s) be the chromaticity coordinate (x of (0.299,0.315), 6500k s, y s) be (0.313,0.329);
Step 12: determine the GTG figure place n of display, n is 8, i.e. GTG exponent number L=2 n=2 8=256;
Step 13: with full GTG by secretly being divided into three sections to bright pairing chromaticity coordinate:
0～L LHeaded by the section, be (x k, y k) change to (x s, y s) curve,
L L～L HBeing the middle straight line segment, is constant chromaticity (x s, y s),
L H～(L-1) be latter end, be (x s, y s) change to (x w, y w) curve,
Wherein, L L=35, L H=185, P L0=1.0, P L1=0.1, P H0=2, P H0=0.5, generally, L LRecommendation be arbitrary integer between 20～50, L HRecommendation be arbitrary integer between 160～200;
Step 14: in above-mentioned parameter substitution head, latter end fit equation, computational data and curve plotting.Wherein, first, latter end fit equation formula is identical, specifically be expressed as follows:
First section fit equation:
x i = x k - ( x k - x s ) × ( i / L L ) P L ;
y i = y k - ( y k - y s ) × ( i / L L ) P L ;
P L＝P L0-(P L0-P L1)×i/L L；
Wherein exponent number i be 0,1,2......L L, (x i, y i) be each rank chromaticity coordinate of match, P L0And P L1Be any setup parameter;
The latter end fit equation:
x i = x s - ( x s - x k ) × ( i / L L ) P H ;
y i = y s - ( y s - y k ) × [ ( i - L H ) / ( L - 1 - L H ) ] P H ;
P H＝P H0-(P H0-P H1)×(i-L H)/(L-1-L H)；
Wherein exponent number i is L H, (L H+ 1), (L H+ 2) ... (L-1), (x i, y i) be each rank chromaticity coordinate of match, P H0And P H1Be any setup parameter.
Step 15: the continuous exponent number of 0,1 after merging with above-mentioned head, last segment of curve and middle straight line segment, 2...... (L-1) is according to constituting target chroma curve value, and available chroma curve data computation goes out the colour temperature curve data simultaneously;
Step 16: whether mild, be then carry out step 17 if observing the chroma curve that calculates; , then do not carry out step 161 or step 162;
Step 161: suitably adjust parameter P L0And P L1, P H0And P H1, return step 14 and carry out corresponding steps calculating again.
Step 162: suitably adjust segmentation boundary L LAnd L H, return step 13 and carry out corresponding steps calculating again.
Gently whether this chroma curve is three sections and is spliced, so need pay special attention to flex point, in order to avoid influence the display display effect, readjust and be provided with parameter and can effectively eliminate flex point.
Step 17: with the feature chroma curve value and the contrast of brightness curve value of target chroma curve value and brightness curve value and display, the calculation correction table is proofreaied and correct display, finishes the trimming process to target indicator.
As Fig. 2, Fig. 3, shown in Figure 4, curve is colourity x curve map, chromaticity y curve map and the colour temperature Tc curve map that calculates according to above-mentioned steps among the figure, from the curve that generates as can be seen its three sections connect mild, obvious flex point do not occur, meet the generation of display target chroma curve under the different-colour requirement fully.
The above; the embodiment of recommending for the present invention only, but protection scope of the present invention is not limited thereto anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (5)

1. the sectional generating method of a display chroma curve is characterized in that, may further comprise the steps:
1) display is arranged on the state of not proofreading and correct colour temperature, measures the full black burst of input of display or the black chromaticity coordinate (x of black window signal k, y k) and the white chromaticity coordinate (x of complete white field signal of input or white window signal w, y w);
2) determine the target colour temperature that display will be proofreaied and correct, calculate the target chromaticity coordinate (x of target colour temperature correspondence s, y s);
3) determine the GTG exponent number L of display;
4) the pairing chromaticity coordinate of full GTG is divided into three sections: 0～L L～L H～(L-1),
0～L LHeaded by the section be (x k, y k) change to (x s, y s) curve;
L L～L HFor interlude is constant chromaticity (x s, y s);
L H～(L-1) be (x for latter end s, y s) change to (x w, y w) curve;
5) according to the chroma curve value on each rank on fit equation calculating head, the latter end, the first section fit equation formula with latter end is identical;
First section fit equation:
x i = x k - ( x k - x s ) × ( i / L L ) P L , y i = y k - ( y k - y s ) × ( i / L L ) P L
P L＝P L0-(P L0-P L1)×i/L L
Wherein i be 0,1,2......L L, (x i, y i) be the chromaticity coordinate of match, P L0And P L1Be arbitrary parameter; The latter end fit equation:
x i = x s - ( x s - x k ) × ( i / L L ) P H , y i = y s - ( y s - y k ) × [ ( i - L H ) / ( L - 1 - L H ) ] P H
P H＝P H0-(P H0-P H1)×(i-L H)/(L-1-L H)
Wherein i is L H, (L H+ 1), (L H+ 2) ... (L-1), (x i, y i) be the chromaticity coordinate of match, P H0And P H1Be arbitrary parameter;
6) whether merge each section chroma curve value and constitute target chroma curve value, go out the colour temperature curve data by the chroma curve data computation, it is mild to observe the chroma curve transition, otherwise, adjust parameter and recomputate target chroma curve value;
7) with the feature chroma curve value contrast of target chroma curve value and display, the calculation correction table is proofreaied and correct display.
2. the sectional generating method of display chroma curve according to claim 1 is characterized in that, described L LBe the arbitrary integer between 20～50, L HIt is the arbitrary integer between 160～200.
3. the sectional generating method of display chroma curve according to claim 1 is characterized in that, described L=2 8=256 or L=2 10=1024.
4. the sectional generating method of display chroma curve according to claim 1 is characterized in that, described P L0=1.0, P L1=0.1, P H0=2, P H1=0.5.
5. the sectional generating method of display chroma curve according to claim 1 is characterized in that, adjustable parameter comprises in the described step 6): P L0And P L1, P H0And P H1Perhaps L LAnd L H
CN2009100828213A 2009-04-23 2009-04-23 Sectional generating method of display chroma curve Active CN101527136B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100828213A CN101527136B (en) 2009-04-23 2009-04-23 Sectional generating method of display chroma curve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100828213A CN101527136B (en) 2009-04-23 2009-04-23 Sectional generating method of display chroma curve

Publications (2)

Publication Number Publication Date
CN101527136A CN101527136A (en) 2009-09-09
CN101527136B true CN101527136B (en) 2010-09-29

Family

ID=41094973

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009100828213A Active CN101527136B (en) 2009-04-23 2009-04-23 Sectional generating method of display chroma curve

Country Status (1)

Country Link
CN (1) CN101527136B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102332238A (en) * 2011-10-31 2012-01-25 德为显示科技股份有限公司 Method for generating target gamma curve of display based on visual discrimination requirement
CN109036262B (en) * 2018-09-06 2020-06-02 长春希达电子技术有限公司 Display characteristic curve correction method and control system of medical LED display screen
CN112735352A (en) * 2020-12-31 2021-04-30 Oppo广东移动通信有限公司 Color temperature self-adaptive adjusting method, device, equipment and medium for display equipment
CN114677983B (en) * 2022-03-30 2023-04-28 Oppo广东移动通信有限公司 Display calibration method and related device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293521A (en) * 1999-10-18 2001-05-02 国际商业机器公司 White dot regulating method colour image processing method, white dot regulating device and liquid crystal display apparatus
CN1641415A (en) * 2004-01-18 2005-07-20 钰瀚科技股份有限公司 Liquid crystal display device and colour correcting circuit and its method
CN1845232A (en) * 2005-04-08 2006-10-11 浙江大学 Automatic measurement and correction method and system for LCD GAMMA curve and color temperature
US20070085816A1 (en) * 1998-05-29 2007-04-19 Silicon Graphics, Inc. System and Method for Providing a Wide Aspect Ratio Flat Panel Display Monitor Independent White-Balance Adjustment and Gamma Correction Capabilities
WO2008142609A1 (en) * 2007-05-16 2008-11-27 Koninklijke Philips Electronics N.V. Improved white backlight for a display

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070085816A1 (en) * 1998-05-29 2007-04-19 Silicon Graphics, Inc. System and Method for Providing a Wide Aspect Ratio Flat Panel Display Monitor Independent White-Balance Adjustment and Gamma Correction Capabilities
CN1293521A (en) * 1999-10-18 2001-05-02 国际商业机器公司 White dot regulating method colour image processing method, white dot regulating device and liquid crystal display apparatus
CN1641415A (en) * 2004-01-18 2005-07-20 钰瀚科技股份有限公司 Liquid crystal display device and colour correcting circuit and its method
CN1845232A (en) * 2005-04-08 2006-10-11 浙江大学 Automatic measurement and correction method and system for LCD GAMMA curve and color temperature
WO2008142609A1 (en) * 2007-05-16 2008-11-27 Koninklijke Philips Electronics N.V. Improved white backlight for a display

Also Published As

Publication number Publication date
CN101527136A (en) 2009-09-09

Similar Documents

Publication Publication Date Title
CN107369408B (en) Toning method, toning device, display driver and display system
US8106866B2 (en) Method for establishing gamma correction table for liquid crystal display
JP4791233B2 (en) Image processing apparatus, image processing method, image output apparatus, and image processing system
KR100748782B1 (en) Color conversion matrix creating device, apparatus for testing a display device, recording media of color conversion matrix creating program, and image display apparatus
CN101546547B (en) Method for correcting display
US8648885B2 (en) Method for creating gamma look-up table and display device
CN101546509B (en) Method for generating target Gamma curve of display
WO2010131500A1 (en) Image processing device and image processing method
CN101527136B (en) Sectional generating method of display chroma curve
CN106409251B (en) The brightness of display panel and the regulating calculation method and system of coloration
CN104681007B (en) A kind of method of work of the multistage brightness stability system of real-time
CN101267494A (en) Color correction table generation method and compound color measuring separation method for digital video device
JP2009540368A (en) Method and system for digitally scaling a gamma curve
CN101118729A (en) Image display method and image display device
CN112292851B (en) Color gamut correction method and device
CN103325351A (en) Image processing apparatus and image processing method
KR20120077754A (en) Method for compensating data, compensating apparatus for performing the method and display device having the compensating apparatus
TWI339384B (en) Color temperature calibration method and related device
CN101546548B (en) Composite lookup table method for synchronous correction of Gamma and chrominance of display
WO2008044437A1 (en) Image processing method and image processing device
CN102522057A (en) Apparatus and method for gamma correction
CN101132472B (en) Image processor, computer readable medium and image processing method
CN112863422B (en) Time schedule controller and display panel
CN114360466A (en) Display correction method and device for display, electronic equipment and storage medium
JP2002055668A (en) Method for measuring input/output characteristics of display device, method for correcting image of the display device, method for preparing icc profile of the display device, storage medium with procedure for the methods stored thereon, and the display device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant