CN107124602B - The automatic gamma curve adjustment method of production line - Google Patents
The automatic gamma curve adjustment method of production line Download PDFInfo
- Publication number
- CN107124602B CN107124602B CN201710374623.9A CN201710374623A CN107124602B CN 107124602 B CN107124602 B CN 107124602B CN 201710374623 A CN201710374623 A CN 201710374623A CN 107124602 B CN107124602 B CN 107124602B
- Authority
- CN
- China
- Prior art keywords
- gamma curve
- curve
- rgb
- gamma
- value
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
- H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
Abstract
The present invention discloses a kind of automatic gamma curve adjustment method of production line, it carries out the research of Gamma algorithms according to screen color temperature characteristic, realize the automatic Gamma debugging of producing line scale of mass production, improve the point debugging effect of automatic white balance, to promote colour temperature consistency, main includes the variation to testing x, y-coordinate after sampled point change RGB step-lengths respectively, and the changing value of x, y after change one step are calculated separately out according to variation；It is calculated further according to the coordinate difference of the x of sampled point, y-coordinate and desired value x0y0, the variation for obtaining sampled point RGB is worth to corresponding weight coefficient α β γ, and new gamma curve is obtained according to weight coefficient α β γ.
Description
Technical field
The present invention relates to the debugging technique fields of television equipment gamma curve, and in particular to a kind of automatic Gamma of production line
Curve adjustment method.
Background technology
Currently, automatic gamma curve debug time is longer (generally more than 300 seconds), it is mainly used in laboratory separate unit sample
The debugging of machine.The single-point debugging station time requirement of machine scale of mass production is stringent (in 20 seconds) on production line, and screen colour temperature is basic
It is corrected using on-line automatic white balance.Automatic white balance is to carry out unified gain and grayscale migration processing to all the points,
It is extremely difficult to the effect of gamma curve debugging.
Invention content
The present invention overcomes the deficiencies in the prior art, provide a kind of automatic gamma curve adjustment method of production line.
The present invention uses following technical scheme：
A kind of automatic gamma curve adjustment method of production line, it includes the following steps：
Step 1, read gamma curve in RGB maximum value, determine which curve in RGB maximum value be 255,
1023 or 4095, then this gamma curve is defined as datum curve, if curve on the basis of the gamma curve of R, △ R=0,
If curve on the basis of the gamma curve of G, △ G=0, if curve on the basis of the gamma curve of B, △ B=0；
Step 2, sampled signal is sampled, RGB is changed respectively, obtain chromaticity coordinates x when one step variation,
The value of y variations, respectively Rx, Ry, Gx, Gy, Bx, By；
Step 3, sampled point parameter is read, includes the value of sampled point RGB, is denoted as R0, G0, B0 respectively；And the color of the point
Coordinate x, y, are denoted as x1, y1；
Step 4, the desired value of setting chromaticity coordinates x, y：To reach chromaticity coordinates x, y, be denoted as x0, y0；
Step 5, it is calculated by the following formula：
Δ R/Rx+ Δ G/Gx+ Δs B/Bx=x0-x1
Δ R/Ry+ Δ G/Gy+ Δs B/By=y0-y1
α=Δ R/R0
β=Δ G/G0
γ=Δ B/B0
GammaR=(1+ α) * GammaR0
GammaG=(1+ β) * GammaG0
GammaB=(1+ γ) * GammaB0
Gamma=GammaR ∪ GammaB ∪ GammaG
Wherein, GammaR0/GammaB0/GammaG0 is the RBG values of original gamma curve in step 1；GammaR/
GammaB/GammaG is the RBG values of calculated new gamma curve；
Step 6, the rgb value in new gamma curve is assigned to movement, completes debugging
Compared with prior art, the beneficial effects of the invention are as follows：
This method tests the variations of xy coordinates respectively after changing RGB step-lengths to sampled point, is calculated separately out and is changed according to variation
The changing value of x, y after change one step；It is calculated further according to the coordinate difference of the x of sampled point, y-coordinate and desired value x0, y0,
The variation for obtaining sampled point RGB is worth to corresponding weight coefficient α β γ, and it is bent to obtain new Gamma according to weight coefficient α β γ
Line.
The realization of the automatic Gamma of this method principal security producing line, and automatic white balance is improved to being answered after sampled point processing
Using all gray scales takes same weight to handle the influence brought；Existing all flat panel products are can be applied to, producing line production is improved
The consistency of product promotes the competitiveness of product in market.
Description of the drawings
Fig. 1 is the flow chart of the automatic gamma curve adjustment method of production line of an embodiment of the present invention.
Specific implementation mode
The present invention is further elaborated below in conjunction with the accompanying drawings.
Gamma curve is read, which is original gamma curve, and rgb value is respectively GammaR0/
GammaG0/GammaB0；
The maximum value for reading RGB in gamma curve, is denoted as Rmax, Gmax, Bmax respectively；
One step is inputted, chromaticity coordinates x, y of current step is tested, is denoted as x1, y1；And according to variation calculate Rx, Ry,
Gx、Gy、Bx、By；
It illustrates：
If Gamma is 8bit data, and Gmax=255, then Δ G=0, β=0；
According to formula Δ R/Rx+ Δ G/Gx+ Δs B/Bx=x0-x1
Δ R/Ry+ Δ G/Gy+ Δs B/By=y0-y1
Due to Δ G=0, then Δ R, Δ B can be calculated；
According to formula α=Δ R/R0
β=Δ G/G0
γ=Δ B/B0
α, γ, β 0 is calculated；
According to formula GammaR=(1+ α) * GammaR0
GammaG=(1+ β) * GammaG0
GammaB=(1+ γ) * GammaB0
GammaR, GammaB is calculated, due to β=0, then GammaG=GammaG0；
According to formula Gamma=GammaR ∪ GammaB ∪ GammaG
It calculates synthesis and obtains new gamma curve；
Rgb value in new gamma curve is assigned to movement, completes debugging.
Wherein：
Δ R/ Δ G/ Δs B is the value for needing to adjust：Adjust the desired value that R/G/B makes test value x1/y1 reach x0/y0
Changing value；
α/β/γ is weight coefficient：The weighted value of GammaR/GammaG/GammaG is obtained by algorithm；
GammaR0/GammaB0/GammaG0 is the RBG values of original gamma curve；GammaR/GammaB/GammaG is
The RBG values of calculated new gamma curve.
The essence of the present invention is described in detail in the above specific implementation mode, but can not be to protection scope of the present invention
It is limited, it should be apparent that, under the inspiration of the present invention, those of ordinary skill in the art can also carry out many improvement
And modification, it should be noted that these improvement and modification are all fallen within the claims of the present invention.
Claims (1)
1. a kind of automatic gamma curve adjustment method of production line, it includes the following steps：
Step 1, read gamma curve in RGB maximum value, determine which curve in RGB maximum value be 255,1023 or
4095, then this gamma curve is defined as datum curve, if curve on the basis of the gamma curve of R, △ R=0, if G
Curve on the basis of gamma curve, then △ G=0, if curve on the basis of the gamma curve of B, △ B=0；
Step 2, sampled signal is sampled, RGB is changed respectively, chromaticity coordinates x, y become when obtaining one step variation
The value of change, respectively Rx, Ry, Gx, Gy, Bx, By；
Step 3, sampled point parameter is read, includes the value of sampled point RGB, is denoted as R0, G0, B0 respectively；And the chromaticity coordinates of the point
X, y is denoted as x1, y1；
Step 4, the desired value of setting chromaticity coordinates x, y：To reach chromaticity coordinates x, y, be denoted as x0, y0；
Step 5, it is calculated by the following formula：
Δ R/Rx+ Δ G/Gx+ Δs B/Bx=x0-x1
Δ R/Ry+ Δ G/Gy+ Δs B/By=y0-y1
α=Δ R/R0
β=Δ G/G0
γ=Δ B/B0
GammaR=(1+ α) * GammaR0
GammaG=(1+ β) * GammaG0
GammaB=(1+ γ) * GammaB0
Gamma=GammaR ∪ GammaB ∪ GammaG
Wherein, GammaR0/GammaB0/GammaG0 is the RBG values of original gamma curve in step 1；
GammaR/GammaB/GammaG is the RBG values of calculated new gamma curve；
Step 6, the rgb value in new gamma curve is assigned to movement, completes debugging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710374623.9A CN107124602B (en) | 2017-05-24 | 2017-05-24 | The automatic gamma curve adjustment method of production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710374623.9A CN107124602B (en) | 2017-05-24 | 2017-05-24 | The automatic gamma curve adjustment method of production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107124602A CN107124602A (en) | 2017-09-01 |
| CN107124602B true CN107124602B (en) | 2018-10-19 |
Family
ID=59729522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710374623.9A Active CN107124602B (en) | 2017-05-24 | 2017-05-24 | The automatic gamma curve adjustment method of production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107124602B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388987B (en) * | 2019-07-24 | 2020-11-10 | 深圳市华星光电技术有限公司 | Method for acquiring color temperature of image |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0411432Y2 (en) * | 1985-03-30 | 1992-03-23 | ||
| JP4922091B2 (en) * | 2007-07-23 | 2012-04-25 | ルネサスエレクトロニクス株式会社 | Video signal processing device, video signal processing method, and display device |
| CN101447161B (en) * | 2008-12-02 | 2011-04-06 | 四川长虹电器股份有限公司 | Method for regulating flat panel display screen |
| CN101840689B (en) * | 2010-05-14 | 2013-06-05 | 中兴通讯股份有限公司 | Method and device for correcting gamma value of LCD screen |
| CN103916648B (en) * | 2014-04-14 | 2015-11-04 | 冠捷显示科技（厦门）有限公司 | The adjustment algorithm of Gamma in LCD TV |
| CN105872511B (en) * | 2016-02-05 | 2017-12-01 | 四川长虹电器股份有限公司 | The method that flat panel TV colour temperature uniformity is improved using a plurality of gamma |
| CN106409212B (en) * | 2016-12-12 | 2021-03-12 | 深圳Tcl数字技术有限公司 | Gamma curve adjusting method and device |
-
2017
- 2017-05-24 CN CN201710374623.9A patent/CN107124602B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107124602A (en) | 2017-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101447161B (en) | Method for regulating flat panel display screen | |
| CN109036233B (en) | Production line multipoint automatic Gamma curve debugging method and system | |
| CN106507082B (en) | The adjustment method and device of white balance | |
| CN102394041B (en) | White balance adjustment method | |
| CN109166555B (en) | Gamma curve correction method and device | |
| WO2023000631A1 (en) | Method and apparatus for determining correction coefficient of display screen light point, and computer device | |
| CN102820018B (en) | Color coordinate regulating method and device thereof | |
| CN102509541B (en) | Color adjusting device, color adjusting method and display device | |
| CN101105916A (en) | GAMMA curve regulation method and device | |
| CN101860764A (en) | White balance adjustment method | |
| CN107578755B (en) | A kind of bearing calibration of screen intensity and colour temperature | |
| CN103926714A (en) | Gamma correction system of display device and correction method | |
| CN108039143A (en) | A kind of method and device of gamma circuit adjustment | |
| WO2017173863A1 (en) | Gamma correction method | |
| CN101350885A (en) | Method for automatically adjusting grey-scale coefficient curve and white balance of flat plate television | |
| CN104219512A (en) | Method for describing color gamut boundary of display device | |
| CN107124602B (en) | The automatic gamma curve adjustment method of production line | |
| CN103686151A (en) | Image chroma JND value determination method | |
| CN105571666B (en) | Flow-compensated method and compensation device, flow sensor | |
| CN103426393B (en) | Display device color correcting method | |
| CN109410889B (en) | White balance adjusting method and device and electronic equipment | |
| TWI476754B (en) | Correcting system and correcting method for display device | |
| CN104553302B (en) | A kind of grey balance calibration steps and device | |
| CN102547372B (en) | Method for determining color lookup table parameters of liquid crystal display television and system device therefore | |
| CN104378625B (en) | Based on image details in a play not acted out on stage, but told through dialogues brightness JND values determination method, the Forecasting Methodology of area-of-interest |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |