CN107124602A - The automatic gamma curve adjustment method of production line - Google Patents
The automatic gamma curve adjustment method of production line Download PDFInfo
- Publication number
- CN107124602A CN107124602A CN201710374623.9A CN201710374623A CN107124602A CN 107124602 A CN107124602 A CN 107124602A CN 201710374623 A CN201710374623 A CN 201710374623A CN 107124602 A CN107124602 A CN 107124602A
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- gamma curve
- curve
- rgb
- gamma
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- 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 AWB, to lift colour temperature uniformity, it is main to include changing sampled point the change for testing x, y-coordinate after RGB step-lengths respectively, calculate the changing value for changing x, y after one step respectively according to change；Coordinate difference further according to the x of sampled point, y-coordinate and desired value x0y0 is calculated, and the change 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 field of television equipment gamma curve, and in particular to a kind of automatic Gamma of production line
Curve adjustment method.
Background technology
At present, automatic gamma curve debug time is longer (generally more than 300 seconds), 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 strict (in 20 seconds) on production line, and screen colour temperature is basic
It is corrected using on-line automatic white balance.AWB is to put the unified gain of progress and GTG migration processing to all,
It is extremely difficult to the effect of gamma curve debugging.
The content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided 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 comprises the following steps：
Step 1, read the maximum of RGB in gamma curve, determine the maximum of that in RGB curve for 255,
1023 or 4095, then this gamma curve is defined as datum curve, if curve on the basis of R gamma curve, △ R=0,
If curve on the basis of G gamma curve, △ G=0, if curve on the basis of B gamma curve, △ B=0；
Step 2, sampled signal is sampled, RGB is changed respectively, obtain chromaticity coordinates x during unit compensation change,
The value of y changes, respectively Rx, Ry, Gx, Gy, Bx, By；
Step 3, sampled point parameter is read, includes sampled point RGB value, R0, G0, B0 is designated as respectively；And the color of the point
Coordinate x, y, are designated as x1, y1；
Step 4, setting chromaticity coordinates x, y desired value：Chromaticity coordinates x, y are reached, x0, y0 is designated as；
Step 5, calculated by equation below：
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 the new gamma curve calculated；
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 changes the change for testing xy coordinates after RGB step-lengths respectively to sampled point, is calculated and changed respectively according to change
Become the changing value of x, y after one step；Coordinate difference further according to the x, y-coordinate and desired value x0, y0 of sampled point is calculated,
The change 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 automatic Gamma of this method principal security producing line realization, and AWB is improved to being answered after sampled point processing
Use the influence that all gray scales take same weight processing to bring；Existing all flat panel products are can be applied to, producing line production is improved
The uniformity of product, lifts the competitiveness of product in market.
Brief 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.
Embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings.
Gamma curve is read, the gamma curve is original gamma curve, and its rgb value is respectively GammaR0/
GammaG0/GammaB0；
The maximum of RGB in gamma curve is read, Rmax, Gmax, Bmax are designated as respectively；
One step is inputted, chromaticity coordinates x, y of current step is tested, is designated as x1, y1；And according to change calculate Rx, Ry,
Gx、Gy、Bx、By；
Illustrate：
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 are calculated, β is 0；
According to formula GammaR=(1+ α) * GammaR0
GammaG=(1+ β) * GammaG0
GammaB=(1+ γ) * GammaB0
GammaR, GammaB are calculated, due to β=0, then GammaG=GammaG0；
According to formula Gamma=GammaR ∪ GammaB ∪ GammaG
Calculate synthesis and obtain new gamma curve；
Rgb value in new gamma curve is assigned to movement, debugging is completed.
Wherein：
The value that Δ R/ Δ G/ Δs B adjusts for needs：Adjust the desired value that R/G/B makes test value x1/y1 reach x0/y0
Changing value；
α/β/γ is weight coefficient：GammaR/GammaG/GammaG weighted value is obtained by algorithm；
GammaR0/GammaB0/GammaG0 is the RBG values of original gamma curve；GammaR/GammaB/GammaG is
The RBG values of the new gamma curve calculated.
The essence of the present invention is described in detail above embodiment, but can not be to protection scope of the present invention
Limited, it should be apparent that, under the enlightenment of the present invention, the art those of ordinary skill can also carry out many improvement
And modification, it should be noted that these are improved and modification all falls within the claims of the present invention.
Claims (1)
1. a kind of automatic gamma curve adjustment method of production line, it comprises the following steps：
Step 1, read the maximum of RGB in gamma curve, determine the maximum of that in RGB curve for 255,1023 or
4095, then this gamma curve is defined as datum curve, if curve on the basis of R gamma curve, △ R=0, if G
Curve on the basis of gamma curve, then △ G=0, if curve on the basis of B gamma curve, △ B=0；
Step 2, sampled signal is sampled, RGB is changed respectively, chromaticity coordinates x, y become when obtaining unit compensation change
The value of change, respectively Rx, Ry, Gx, Gy, Bx, By；
Step 3, sampled point parameter is read, includes sampled point RGB value, R0, G0, B0 is designated as respectively；And the chromaticity coordinates of the point
X, y, are designated as x1, y1；
Step 4, setting chromaticity coordinates x, y desired value：Chromaticity coordinates x, y are reached, x0, y0 is designated as；
Step 5, calculated by equation below：
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 the new gamma curve calculated；
Step 6, the rgb value in new gamma curve is assigned to movement, completes debugging.
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| CN201710374623.9A CN107124602B (en) | 2017-05-24 | 2017-05-24 | The automatic gamma curve adjustment method of production line |
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| CN201710374623.9A CN107124602B (en) | 2017-05-24 | 2017-05-24 | The automatic gamma curve adjustment method of production line |
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| CN107124602B CN107124602B (en) | 2018-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388987A (en) * | 2019-07-24 | 2019-10-29 | 深圳市华星光电技术有限公司 | The method for obtaining photo dazzle color temperature |
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| US4686562A (en) * | 1985-03-30 | 1987-08-11 | Kabushiki Kaisha Toshiba | Gamma correction circuit |
| CN101447161A (en) * | 2008-12-02 | 2009-06-03 | 四川长虹电器股份有限公司 | Method for regulating flat panel display screen |
| CN101840689A (en) * | 2010-05-14 | 2010-09-22 | 中兴通讯股份有限公司 | Method and device for correcting gamma value of LCD screen |
| US20120274854A1 (en) * | 2007-07-23 | 2012-11-01 | Renesas Electronics Corporation | Video signal processing apparatus performing gamma correction by cubic interpolation computation, and method thereof |
| CN103916648A (en) * | 2014-04-14 | 2014-07-09 | 冠捷显示科技（厦门）有限公司 | Adjusting algorithm for Gamma in liquid crystal display television set |
| CN105872511A (en) * | 2016-02-05 | 2016-08-17 | 四川长虹电器股份有限公司 | Method for improving color temperature consistency of flat panel television through multiple gamma curves |
| CN106409212A (en) * | 2016-12-12 | 2017-02-15 | 深圳Tcl数字技术有限公司 | Gamma curve adjustment method and device |
-
2017
- 2017-05-24 CN CN201710374623.9A patent/CN107124602B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4686562A (en) * | 1985-03-30 | 1987-08-11 | Kabushiki Kaisha Toshiba | Gamma correction circuit |
| US20120274854A1 (en) * | 2007-07-23 | 2012-11-01 | Renesas Electronics Corporation | Video signal processing apparatus performing gamma correction by cubic interpolation computation, and method thereof |
| CN101447161A (en) * | 2008-12-02 | 2009-06-03 | 四川长虹电器股份有限公司 | Method for regulating flat panel display screen |
| CN101840689A (en) * | 2010-05-14 | 2010-09-22 | 中兴通讯股份有限公司 | Method and device for correcting gamma value of LCD screen |
| CN103916648A (en) * | 2014-04-14 | 2014-07-09 | 冠捷显示科技（厦门）有限公司 | Adjusting algorithm for Gamma in liquid crystal display television set |
| CN105872511A (en) * | 2016-02-05 | 2016-08-17 | 四川长虹电器股份有限公司 | Method for improving color temperature consistency of flat panel television through multiple gamma curves |
| CN106409212A (en) * | 2016-12-12 | 2017-02-15 | 深圳Tcl数字技术有限公司 | Gamma curve adjustment method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388987A (en) * | 2019-07-24 | 2019-10-29 | 深圳市华星光电技术有限公司 | The method for obtaining photo dazzle color temperature |
| 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 |
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| CN107124602B (en) | 2018-10-19 |
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