CN107222733A - A kind of gamut conversion method and device - Google Patents
A kind of gamut conversion method and device Download PDFInfo
- Publication number
- CN107222733A CN107222733A CN201710563992.2A CN201710563992A CN107222733A CN 107222733 A CN107222733 A CN 107222733A CN 201710563992 A CN201710563992 A CN 201710563992A CN 107222733 A CN107222733 A CN 107222733A
- Authority
- CN
- China
- Prior art keywords
- signal
- display device
- coordinates
- rgb
- coordinate
- 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.)
- Granted
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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Controls And Circuits For Display Device (AREA)
- Color Image Communication Systems (AREA)
- Processing Of Color Television Signals (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
The invention discloses a kind of gamut conversion method and device, this method includes：Standard measuring signal is converted into display device rgb signal according to the space conversion matrix calculated according to original coordinates；Corresponding with display device rgb signal result coordinate is searched, and, acquisition standard measuring signal coordinates of targets to be shown on a display screen；Whether the difference of judged result coordinate and coordinates of targets is more than default error；If difference is more than the default error, adjust original coordinates, standard measuring signal is converted into new display device rgb signal according to the space conversion matrix calculated according to original coordinates after adjustment, until the difference of the new corresponding result coordinate of display device rgb signal and coordinates of targets is less than or equal to default error.This method considers not only over range signal problem, avoids the limitation of system byte digit, and the error of actual coordinate after color gamut conversion and information source coordinate is small, precision is high, the problem of can eradicating cross-color.
Description
Technical field
The present invention relates to Color gamut mapping technology field, more particularly to a kind of gamut conversion method and device.
Background technology
In recent years, high colour gamut TV has captured rapidly the position of major brand of television flagship products, either world-class
CES (International Consumer Electronics Show, international consumer electronics product exhibition) it is consumer
Electronic product exhibition, or largest domestic AWE (Appliance＆electronics World Expo, Chinese household electrical appliances and consumption
Electronics fair) in household electrical appliances exhibition, high colour gamut is all the spotlight that TV is put on display.At present, the display device such as high colour gamut TV
Colour gamut can meet or exceed 100%NTSC (National Television Standards Committee, U.S.
State's national television standard).However, because most information sources are at present still according to BT.709 standards or BT.2020 standard systems
Make, the information source such as made according to BT.709 standards, colour gamut is in 72%NTSC, and information source is mismatched with display device colour gamut, if not
Color Gamut Mapping processing is done, it may appear that part colours tonal distortion, color saturation overrich problem, accordingly, it would be desirable to pass through Color Gamut Mapping
Improve the problem.
By taking BT.709 multi-standard sources as an example, such as information source is YCbCr signals, and the main flow mapping scheme of display device chip is as schemed
Shown in 1：YCbCr signal receiving modules receive information source YCbCr signals；YCbCr signals are switched to information source RGB by YCbCr decoder modules
Signal；Information source rgb signal and information source are carried out GAMMA and matched by GAMMA matching modules；After color gamut conversion module matches GAMMA
Information source rgb signal be converted to display device rgb signal, reach the purpose of information source and display device color gamut conversion；Compression/cutting
Module is compressed or cut exceeded part to the signal of over range in display device rgb signal, complies with signal transmission
Specification.Wherein, information source and the color gamut conversion of display device include two steps：RGB turns normed space submodule by the GMAMMA of acquisition
Information source rgb signal after matching is converted to normed space signal, and computational methods are：The normed space signal changed is GAMMA
Product between the rgb value and BT.709 multi-standard sources and normed space transition matrix of information source rgb signal after matching somebody with somebody；Normed space
Turn RGB submodules and normed space signal is converted into display device rgb signal, computational methods are：Display device rgb signal is mark
Quasi- space and the product of display device rgb color space transition matrix and the normed space signal rgb value of conversion.Display device core
After piece color gamut conversion terminates, the display device rgb signal after compression/cutting is sent to the TCON (Timer of display screen
Control Register, time schedule controller), TCON is handled the display device rgb signal after compression/cutting, is obtained
The rgb signal to display screen is exported, display knot is finally presented in optics of these rgb signals through display screen on a display screen
Really.
But, during above-mentioned color gamut conversion, the process that normed space signal is converted into display device rgb signal is usual
Obtained according to matrix computations, due to over range signal problem can not be considered during matrix computations, add system byte digit
Limitation, matrix calculation result decimal retains limited bits, causes error larger, precision is inadequate, it is impossible to eradicate cross-color problem.
The content of the invention
To overcome problem present in correlation technique, the present invention provides a kind of gamut conversion method and device.
First aspect according to embodiments of the present invention includes there is provided a kind of gamut conversion method, this method：
Standard measuring signal is converted into display device RGB letters according to the space conversion matrix calculated according to original coordinates
Number；
Result coordinate corresponding with the display device rgb signal is searched, and, the standard measuring signal is obtained aobvious
Coordinates of targets to be shown in display screen；
Judge whether the difference of the result coordinate and coordinates of targets is more than default error；
If the difference is more than the default error, the original coordinates are adjusted, by the standard measuring signal according to root
The space conversion matrix calculated according to original coordinates after adjustment is converted to new display device rgb signal, until new display device
The difference of the corresponding result coordinate of rgb signal and the coordinates of targets is less than or equal to the default error.
Second aspect according to embodiments of the present invention includes there is provided a kind of color gamut conversion device, the device：
Standard measuring signal modular converter, for standard measuring signal to be changed according to the space calculated according to original coordinates
Matrix conversion is display device rgb signal；
As a result coordinate and coordinates of targets acquisition module, sit for searching result corresponding with the display device rgb signal
Mark, and, obtain standard measuring signal coordinates of targets to be shown on a display screen；
Judge module, for judging whether the difference of the result coordinate and coordinates of targets is more than default error；
Coordinate Adjusting module, if being more than the default error for the difference, adjusts the original coordinates, by the mark
Quasi- test signal is converted to new display device rgb signal according to the space conversion matrix calculated according to original coordinates after adjustment,
Until the difference of the new corresponding result coordinate of display device rgb signal and the coordinates of targets is less than or equal to described preset
Error.
From above technical scheme, the embodiment of the present invention provides a kind of gamut conversion method and device, aobvious by adjustment
Show the original coordinates of equipment, obtain new space conversion matrix, standard measuring signal is changed according to new space conversion matrix
For display device rgb signal, the display device rgb signal correspondence that standard measuring signal is changed shows that the result of screen display is sat
Coordinates of targets to be shown is contrasted mark on a display screen with standard measuring signal, make the result coordinate that is obtained after color gamut conversion and
The difference of coordinates of targets is less than or equal to default error, so as to obtain the display result of standard measuring signal on a display screen.This
Using standard measuring signal and its coordinates of targets to be shown space conversion matrix is needed to use on a display screen in method
Display device coordinate be modified, according to revised display device coordinate so as to correcting space conversion matrix, survey standard
Trial signal and source signal all carry out color gamut conversion according to revised space conversion matrix so that display screen after color gamut conversion
The display result of upper acquisition and the difference of coordinates of targets are less than or equal to default error.Due to by constantly adjusting and correcting space
Transition matrix, so that the difference of the display result and coordinates of targets after color gamut conversion is in default error range, so not only
In view of over range signal problem, the limitation of system byte digit is avoided, and screen display is shown after this method color gamut conversion
Actual coordinate and information source coordinate error is small, precision is high, the problem of can eradicating cross-color.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of main flow mapping schematic flow sheet for display device master chip that Fig. 1 provides for prior art；
Fig. 2 is a kind of schematic flow sheet of gamut conversion method provided in an embodiment of the present invention；
Fig. 3 is a kind of method flow schematic diagram for adjusting original coordinates provided in an embodiment of the present invention；
Fig. 4 is a kind of method flow schematic diagram for calculating original coordinates after adjustment provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of another gamut conversion method provided in an embodiment of the present invention；
Fig. 6 is the schematic flow sheet of another gamut conversion method provided in an embodiment of the present invention；
Fig. 7 is a kind of method for searching original coordinates after RGB adjustment corresponding with source signal provided in an embodiment of the present invention
Schematic flow sheet；
Fig. 8 is a kind of structural representation of color gamut conversion device provided in an embodiment of the present invention；
Fig. 9 is a kind of structural representation of Coordinate Adjusting module provided in an embodiment of the present invention；
Figure 10 is a kind of structural representation of original coordinates adjustment unit provided in an embodiment of the present invention；
Figure 11 is the structural representation of another color gamut conversion device provided in an embodiment of the present invention；
Figure 12 is the structural representation of another color gamut conversion device provided in an embodiment of the present invention；
Figure 13 is a kind of structural representation of second information source modular converter provided in an embodiment of the present invention.
Embodiment
Gamut conversion method provided in an embodiment of the present invention, for the display devices such as high colour gamut TV receive source signal it
Preceding display device chip debugs the stage.By this method, display device coordinate is adjusted, makes standard measuring signal according to former after adjustment
The space conversion matrix that beginning coordinate is calculated carries out the display device rgb signal of color gamut conversion acquisition, finally shows on a display screen
Result and the error of coordinates of targets be less than or equal to default error range.Below by taking high colour gamut TV as an example, to of the invention real
The gamut conversion method for applying example offer is described in detail.
The embodiment of the present invention provides a kind of gamut conversion method, as shown in Fig. 2 including：
Step S100：Standard measuring signal is converted into display according to the space conversion matrix calculated according to original coordinates to set
Standby rgb signal.
Wherein, the space conversion matrix be according to display device coordinate be the normed space that calculates of original coordinates with
Display device rgb color space transition matrix.
In specific implementation process, TV chip can send standard measuring signal, the standard measuring signal, with
Exemplified by BT.709 multi-standard sources, including BT.709 standard R test signals, BT.709 standard G test signals, BT.709 standards B are surveyed
Trial signal；By taking BT.2020 multi-standard sources as an example, including BT.2020 standard R test signals, BT.2020 standard G test signals,
BT.2020 standard B test signals.
Exemplified by using BT.709 standard R test signals as source signal, BT.709 standard R test signals are YCbCr signals.
The YCbCr signal receiving modules of TV chip receive BT.709 standard R test signals；YCbCr decoder modules are by BT.709 standards R
Test signal switchs to information source rgb signal；GAMMA matching modules carry out information source rgb signal and BT.709 standard R test signals
GAMMA is matched；Color gamut conversion module GAMMA is matched after BT.709 standard R test signals information source rgb signal be converted to it is aobvious
Show equipment rgb signal.
Wherein, information source and the color gamut conversion of display device include two steps：RGB turns XYZ submodules by GMAMMA of acquisition
Information source rgb signal with rear BT.709 standards R test signals is converted to XYZ normed space signals, and computational methods are：
Wherein,For the information source rgb signal of BT.709 standard R test signals,For XYZ normed space signals,For BT.709 multi-standard sources color space and the transition matrix of XYZ normed spaces.
The information source rgb signal of BT.709 standard R test signals after GAMMA is matched is converted to XYZ normed space signals
Afterwards, during according to display device coordinate for original coordinates, space conversion matrix is calculated, the space conversion matrix is according to display
Device coordinate is the normed space that calculates of original coordinates and display device rgb color space transition matrix, normed space with
Display device rgb color space transform matrix calculations method such as following formula：
Wherein,For normed space and display device rgb color space transition matrix,For the XYZ matrixes of display device Coordinate Conversion,For information source Coordinate Conversion
XYZ inverse of a matrix matrixes,For BT.709 multi-standard sources color space and XYZ normed spaces
Transition matrix inverse matrix.
Display device Coordinate Conversion is into the method for XYZ matrixes：If display device coordinate is (xRd, yRd), according to formula zRd
=1-xRd-yRd, andWithRespectively
Calculate XRd、YRdAnd ZRd, because BT.709 standard R test signals are R primary colours, G and B corresponding X, Y, Z are 0, i.e. XGd、YGd、
ZGd、XBd、YBdAnd ZBdIt is 0, by XRd、YRd、ZRd、XGd、YGd、ZGd、XBd、YBdAnd ZBdValue insert matrixThe XYZ matrixes of BT.709 standard R test signal display device Coordinate Conversions can be obtained.
It according to display device coordinate is normed space and display that original coordinates are calculated to be due to space conversion matrix
Equipment rgb color space transition matrix, herein,The XYZ matrixes of original coordinates conversion are should be, for example：
Display device coordinate during the transform matrix calculations of XYZ normed spaces and display device rgb color space uses original coordinates
(0.681192,0.30539), be into the method migration of XYZ matrixes using above-mentioned display device Coordinate Conversion by the original coordinates
XYZ matrixes, the XYZ matrixes and BT.709 multi-standard sources color space that the matrix and BT.709 standard R test signals are changed with
The inverse matrix product of the transition matrix of XYZ normed spaces, you can obtain space conversion matrixThen root then,
According to formula
The XYZ normed space signals of BT.709 standard R test signals are converted into display device rgb signal, wherein,For the display device rgb signal for the BT.709 standard R test signals changed according to space conversion matrix.
When BT.709 standard R test signals are converted to display device rgb signal, it is compressed/cut after, TV chip can be with
Grab the display device rgb signal (X that BT.709 standard R test signals are changed according to space conversion matrix0, Y0, Z0), (X0,
Y0, Z0) it is output of the TV chip in this step.
Step S200：Result coordinate corresponding with the display device rgb signal is searched, and, obtain the standard and survey
Trial signal coordinates of targets to be shown on a display screen.
Wherein, the result coordinate for display device rgb signal is corresponding, the coordinate that shows on a display screen.Specific
In implementation process, the corresponding result coordinate of the display device rgb signal can be searched from default look-up table, described preset is looked into
Table is looked for be generally the initial ini file of display screen.TV chip stores default look-up table, and the default look-up table is according to aobvious
The file that display screen display characteristic makes, includes the display device rgb signal and correspondence display device rgb signal of TCON inputs
As a result coordinate, as shown in the table：
In a kind of application scenarios, TV chip grabs the display device RGB letters of BT.709 standard R test signals conversion
Number value be (229,0,0), it is corresponding when finding TCON inputs (i.e. TV chip export) from default look-up table for (229,0,0)
The result coordinate shown on a display screen is (0.678466,0.304445).
On the display screen coordinates of targets to be shown be information source entirely without the coordinate in the case of cross-color, with information source
Coordinate is identical, for BT.709 standard R test signals, and (0.64,0.33) is the coordinate of BT.709 standard R test signals,
Its on a display screen coordinates of targets to be shown be also (0.64,0.33).
It is described to obtain standard measuring signal target to be shown on a display screen in a kind of possible embodiment
Coordinate, including：
Standard measuring signal coordinates of targets to be shown on a display screen is searched from goal-selling coordinate file.
In specific implementation process, for different colours or different types of standard measuring signal, correspondence is by it in display
Coordinates of targets to be shown on screen, sets up goal-selling coordinate file.For example, can include in goal-selling coordinate file
BT.709 standard R test signals on a display screen treat on a display screen by coordinates of targets to be shown, BT.709 standard G test signals
The coordinates of targets and BT.709 standard B test signals of display coordinates of targets to be shown on a display screen.
Step S300：Judge whether the difference of the result coordinate and coordinates of targets is more than default error.
According to the result coordinate (0.678466,0.304445) and coordinates of targets (0.64,0.33) obtained in step S200,
The difference of the two is calculated, wherein, the difference includes：As a result the difference of the abscissa of coordinate and coordinates of targets, and result coordinate
And the difference of the ordinate of coordinates of targets.It is with result coordinate (0.678466,0.304445) and coordinates of targets (0.64,0.33)
Example, it is 0.038466, ordinate difference -0.025555 to be computed obtaining result coordinate and the abscissa difference of coordinates of targets.
In specific implementation process, default error can be that default abscissa target error or default ordinate target are missed
Difference, by taking default abscissa target error as an example, this step may determine that result coordinate and coordinates of targets abscissa difference whether
More than default abscissa target error.
If the difference is less than or equal to default error, step terminates, i.e. the display of BT.709 standards R test signals is set
Standby coordinate is defined as original coordinates, and the display device rgb signal changed by space conversion matrix is BT.709 standards R tests
Result after the final colour gamut of signal turns, the color gamut conversion of BT.709 standard R test signals is finished.
If the difference is more than the default error, step S400 is performed.
Step S400：The original coordinates are adjusted, by the standard measuring signal according to according to original coordinates meter after adjustment
The space conversion matrix of calculation is converted to new display device rgb signal, until the corresponding result of new display device rgb signal is sat
The difference of mark and the coordinates of targets is less than or equal to the default error.
Wherein, described is to be according to display device coordinate according to the space conversion matrix calculated according to original coordinates after adjustment
The normed space that original coordinates are calculated after adjustment and display device rgb color space transition matrix.
In a kind of possible embodiment, as shown in figure 3, for how to adjust the original coordinates, comprising the following steps：
Step S401：Calculate the ratio K of the difference and the default error.
In embodiments of the present invention, according to the difference and the ratio K of the default error, it is determined that to the tune of original coordinates
View picture degree.In specific implementation process, the K can be the abscissa difference and default abscissa of result coordinate and coordinates of targets
The ratio of target error.
Certainly, in specific implementation process, the K can indulge for the ordinate difference of result coordinate and coordinates of targets with default
The ratio of coordinate target error.It is any of the above-described ratio that user can choose K according to actual conditions, is not specifically limited herein.
Step S402：Using 0.5K times of the difference original coordinates after adjustment are used as with the original coordinates sum.
In specific implementation process, the amplitude that 0.5K times of the difference is adjusted as this to original coordinates, then,
Original coordinates are by 0.5K times of the difference and the original coordinates sum after adjustment.
In a kind of application scenarios, the difference is the difference of the abscissa of result coordinate and coordinates of targets, and as a result coordinate is
(0.678466,0.304445), coordinates of targets are (0.64,0.33), calculate the abscissa for obtaining result coordinate and coordinates of targets
Difference is that 0.038466, ordinate difference is -0.025555, for example, default abscissa target error is 0.01, then, K=
0.038466/0.01=3.8466.Because the abscissa difference of result coordinate and coordinates of targets is larger, therefore, the amplitude of adjustment
It is relatively large.
The abscissa of original coordinates is 0.681192+0.5*3.8466*0.038466=0.755173658, indulged after adjustment
Coordinate is 0.30539+0.5*3.8466* (- 0.025555)=0.256240069, that is, original coordinates are after adjusting
(0.75517365,0.256240069).
In a kind of application scenarios, as shown in figure 4, described 0.5K times by the difference is made with the original coordinates sum
For after adjustment the step of original coordinates, in addition to：
Step S4021：N effective digitals are taken to the ratio of the difference and the default error, K ' is designated as, wherein, n and
The number of significant figures of the result coordinate is identical.
In specific implementation process, such as result coordinate has 5 effective digitals, then the K values calculated also take 5 significant figures
Word, is designated as K '.
Step S4022：Using the 0.5K ' of the difference times original coordinates after adjustment are used as with the original coordinates sum.
In specific implementation process, it can also retain and result seat to reduce original coordinates after follow-up amount of calculation, adjustment
Mark identical digit effective digital.For example after adjusting original coordinates are (0.75517365,0.256240069), due to result coordinate
Retain 5 effective digitals, it is effective digital that original coordinates after adjustment are also retained into 5, is (0.75517,0.25624).
The display device coordinate for calculating normed space and display device rgb color space transition matrix is changed into original after adjustment
Coordinate (0.75517,0.25624), i.e., according to original coordinates after adjustment, can calculate new space conversion matrix, TV core
Piece will resend BT.709 standard R test signals, and BT.709 standard R test signals can turn according to new space conversion matrix
It is changed to new display device rgb signal (X0, Y0, Z0)。
TV chip captures new display device rgb signal (X0, Y0, Z0), result correspondence is searched from default look-up table
Result coordinate, calculate the difference of the result coordinate and coordinates of targets, judge whether the difference is more than default error, if the difference
Less than or equal to default error, then the display device coordinate of BT.709 standards R test signals is defined as original seat after above-mentioned adjustment
Mark, the color gamut conversion of BT.709 standard R test signals is finished.
If the difference is more than default error, continue to adjust original coordinates, adjust the computational methods and above-mentioned amplitude meter of amplitude
Calculation method is identical, repeatedly adjusts original coordinates, the corresponding result coordinate of new display device rgb signal and the coordinates of targets it
Between difference be less than or equal to the default error, now, the display device coordinate of BT.709 standard R test signals is defined as
Original coordinates after newest adjustment, the color gamut conversion of BT.709 standard R test signals is finished.
Adjustment by this step to original coordinates, and then adjustment space transition matrix, make BT.709 standard R test signals
The difference between the new corresponding result coordinate of display device rgb signal and the coordinates of targets is converted less than or equal to described
Default error, i.e. BT.709 standards R test signals convert new display device rgb signal after TCON inputs, on display screen
The actual coordinates of targets (0.64,0.33) with display screen display is being preset within error, utilizes this method standard measuring signal
Carry out after color gamut conversion, the actual coordinate and the error of the information source coordinate of standard measuring signal shown on a display screen is small, precision
Height, the problem of cross-color being eradicated.
When above-mentioned steps are BT.709 standard R test signals only to information source, the detailed description that its color gamut conversion process is carried out,
In specific implementation process, information source can also for BT.709 standard G test signals, BT.709 standard B test signals or
The standard RGB test signals of other standards information source, difference is, when information source is BT.709 standard G test signals, BT.709
During the standard RGB test signals of standard B test signals or other standards information source, the coordinates of targets of screen display is shown
It is also the corresponding coordinate of these information sources for the corresponding coordinates of targets of these signals.
Gamut conversion method provided in an embodiment of the present invention, by adjusting display device coordinate, obtains new space conversion
Matrix, standard measuring signal is converted to display device rgb signal according to new space conversion matrix, and standard measuring signal is changed
Display device rgb signal correspondence show result coordinate and the standard measuring signal of screen display mesh to be shown on a display screen
Mark coordinate is contrasted, and the difference of the result coordinate and coordinates of targets obtained after color gamut conversion is less than or equal to default error, from
And the display result of standard measuring signal is obtained on a display screen.Standard measuring signal and its will be in display screen is utilized in this method
The display device coordinate that upper coordinates of targets to be shown is needed to use to space conversion matrix is modified, according to revised aobvious
Show device coordinate to correct space conversion matrix, standard measuring signal and source signal is all turned according to revised space
Change matrix carry out color gamut conversion so that the display result and the difference of coordinates of targets obtained after color gamut conversion on display screen be less than or
Equal to default error.Due to by constantly adjusting and correcting space conversion matrix so that display result after color gamut conversion with
The difference of coordinates of targets so considers not only over range signal problem, avoids system byte position in default error range
Number limitation, and shown after this method color gamut conversion the actual coordinate of screen display and information source coordinate error is small, precision is high, energy
The problem of enough eradicating cross-color.
In the first possible embodiment, based on Fig. 2, as shown in figure 5, methods described also includes：
Step S510：Other two kinds of face in the corresponding RGB three primary colours of standard measuring signal described in same type are obtained respectively
Original coordinates after color adjustment.
In specific implementation process, the type of information source includes BT.709 multi-standard sources, BT.2020 multi-standard sources etc., with
Exemplified by BT.709 multi-standard sources, in above-described embodiment, original coordinates after the adjustment of BT.709 standard R test signals are obtained, are utilized
Identical method, original coordinates and BT.709 standard B test signals after the adjustment of BT.709 standard G test signals can be obtained respectively
Original coordinates after adjustment.
Step S610：Distinguish original coordinates after corresponding adjustment according to the RGB three primary colours, calculating obtains the standard and surveyed
The new space conversion matrix of trial signal corresponding types.
Will be former after original coordinates, the adjustment of BT.709 standard G test signals after the BT.709 standard R test signals adjustment of acquisition
Original coordinates are converted to XYZ forms after beginning coordinate and the adjustment of BT.709 standard B test signals, insert
According to formula (1), normed space and display device rgb color space transition matrix are calculatedNow calculate
Normed space and display device rgb color space transition matrixSquare is changed for the new space of BT.709 multi-standard sources
Battle array.
Step S710：If receiving the source signal with the standard measuring signal same type, by the source signal
Display device rgb signal is converted to according to the new space conversion matrix.
In specific implementation process, when TV chip receives BT.709 multi-standard source signals, first BT.709 information sources letter
Number information source rgb signal is converted to, then carries out GAMMA matchings, the information source rgb signal after the GMAMMA matchings of acquisition is converted to
XYZ normed space signals, display device rgb signal is converted to further according to new space conversion matrix.TV chip is by conversion
Display device rgb signal is sent to TCON, and BT.709 multi-standard source signals will be finally shown on a display screen.
Gamut conversion method provided in an embodiment of the present invention, when receiving the source signal with standard measuring signal same type
When, original coordinates after original coordinates, the adjustment of standard G test signals after use standard R test signals adjustment direct to source signal
The new space conversion matrix that original coordinates are calculated after being adjusted with standard B test signals, the information source RGB letters after GMAMMA is matched
The XYZ normed space signals of number conversion are converted to display device rgb signal, and source signal is finally obtained on tv display screen
Show result.In this method pair with the source signal of standard measuring signal same type directly using the adjustment of standard R test signals after
The new sky that original coordinates are calculated after original coordinates and standard B test signals are adjusted after original coordinates, the adjustment of standard G test signals
Between transition matrix carry out color gamut conversion.So consider not only over range signal problem, avoid the limitation of system byte digit, and
And shown after this method color gamut conversion the actual coordinate of screen display and source signal coordinate error is small, precision is high, Neng Gougen
The problem of except cross-color.
In second of possible embodiment, based on Fig. 2, referring to Fig. 6, methods described also includes：
Step S520：Other two kinds of face in the corresponding RGB three primary colours of standard measuring signal described in same type are obtained respectively
The RGB three primary colours are distinguished original coordinates after corresponding adjustment and are stored in display device coordinate file by original coordinates after color adjustment.
In specific implementation process, the information source of the display device such as high colour gamut TV may more than one, BT.709 standards letter
Source, BT.2020 multi-standard sources etc., above-mentioned steps obtain original coordinates after the adjustment of BT.709 standard R test signals, using identical
Method, can obtain respectively BT.709 standard G test signals adjustment after original coordinates and BT.709 standard B test signals adjustment
Original coordinates afterwards, the type deposit display device coordinate file of original coordinates correspondence standard measuring signal after these three are adjusted
In.
Step S620：Original coordinates after the corresponding RGB three primary colours adjustment of other kinds of standard measuring signal are obtained respectively,
Original coordinates after correspondence adjustment are stored in the display device coordinate file.
In a kind of application scenarios, original coordinates after the adjustment of BT.2020 standard R test signals, BT.2020 marks are obtained respectively
Original coordinates after original coordinates and BT.2020 standard B test signals are adjusted after quasi- G test signals adjustment, after these three are adjusted
The type of original coordinates correspondence standard measuring signal is also stored in display device coordinate file.
Step S720：If receiving source signal, search and believe with the information source from the display device coordinate file
Original coordinates after number corresponding RGB three primary colours adjustment, calculate the space conversion matrix for obtaining the source signal, by the information source
Signal is converted to display device rgb signal according to the space conversion matrix of the source signal.
In specific implementation process, make when receiving source signal, searched and source signal pair from display device file
Original coordinates after the RGB three primary colours adjustment answered, original coordinates are converted to XYZ forms after RGB three primary colours are adjusted, and according to formula
(1) space conversion matrix for obtaining the source signal is calculated, the source signal is changed according to the space of the source signal
Matrix conversion is that can obtain the display result of the source signal on display device rgb signal, display screen.
It is described to be searched and the source signal from the display device coordinate file in a kind of possible embodiment
Original coordinates after corresponding RGB three primary colours adjustment, referring to Fig. 7, including,
Step S721：Judge the source type of the source signal.
In specific implementation process, its coding range of various information source signal is also different, in embodiments of the present invention, according to letter
The coding range of source signal, determines the type of information source.
Step S722：According to the source type, it is determined that the type of standard measuring signal corresponding with the source signal.
The source type determined according to step S721, determines the type of the corresponding standard measuring signal of the source signal.
Step S723：According to the type of the standard measuring signal, searched from the display device coordinate file and same
Original coordinates after the corresponding RGB three primary colours adjustment of type standard test signal.
Gamut conversion method provided in an embodiment of the present invention, can be according to letter when the source signal of reception is a certain type
The type of source signal, searches original coordinates after RGB three primary colours adjustment corresponding with source signal from display device coordinate file,
Original coordinates after being adjusted according to RGB three primary colours, calculate the standard of the space conversion matrix of the source signal, the i.e. source signal
Space and display device rgb color space transition matrix, source signal are converted to display device RGB according to the space conversion matrix
Signal, so as to obtain the display result of source signal on a display screen.To source signal directly using in contrast in this method
Original coordinates and standard B test signals are adjusted after original coordinates, the adjustment of standard G test signals after the standard R test signals adjustment answered
The new space conversion matrix that whole rear original coordinates are calculated carries out color gamut conversion.So consider not only over range signal problem,
The limitation of system byte digit is avoided, and shows that the actual coordinate of screen display and source signal are sat after this method color gamut conversion
Target error is small, precision is high, the problem of can eradicating cross-color.
Based on identical technical scheme, the embodiment of the present invention additionally provides a kind of color gamut conversion device, as shown in figure 8, institute
Stating device includes：The standard measuring signal modular converter 100, result coordinate and the coordinates of targets acquisition module 200 that are sequentially connected, sentence
Disconnected module 300 and Coordinate Adjusting module 400.
The standard measuring signal modular converter 100, for by standard measuring signal according to being calculated according to original coordinates
Space conversion matrix is converted to display device rgb signal.
The result coordinate and coordinates of targets acquisition module 200, it is corresponding with the display device rgb signal for searching
As a result coordinate, and, obtain standard measuring signal coordinates of targets to be shown on a display screen.
In a kind of possible embodiment, as a result coordinate and coordinates of targets acquisition module 200, including：Coordinates of targets is searched
Unit.The coordinates of targets searching unit, for searching the standard measuring signal from goal-selling coordinate file in display
Coordinates of targets to be shown on screen.
The judge module 300, for judging whether the difference of the result coordinate and coordinates of targets is more than default error.
The Coordinate Adjusting module 400, if being more than the default error for the difference, adjusts the original coordinates,
The standard measuring signal is converted into new display device according to the space conversion matrix calculated according to original coordinates after adjustment
Rgb signal, until the difference of the new corresponding result coordinate of display device rgb signal and the coordinates of targets is less than or equal to
The default error.
In a kind of possible embodiment, the Coordinate Adjusting module 400, as shown in figure 9, including：The ratio being sequentially connected
It is worth computing unit 401 and original coordinates adjustment unit 402.
The ratio calculation unit 401, the ratio K for calculating the difference and the default error.
The original coordinates adjustment unit 402, for using 0.5K times of the difference with the original coordinates sum as
Original coordinates after adjustment.
In a kind of application scenarios, the original coordinates adjustment unit 402, as shown in Figure 10, including：The K ' being sequentially connected
Original coordinates computation subunit 4022 after determination subelement 4021 and adjustment.
K ' the determination subelements 4021, n effective digitals are taken for the ratio to the difference and the default error,
K ' is designated as, wherein, n is identical with the number of significant figures of the result coordinate；
Original coordinates computation subunit 4022 after the adjustment, for by the 0.5K ' of the difference times and described original sitting
Mark sum is used as original coordinates after adjustment.
In the first possible embodiment, described device, based on Fig. 8, referring to Figure 11, in addition to first be sequentially connected
Coordinate obtaining module 510, the information source modular converter 710 of space conversion matrix computing module 610 and first.
First coordinate obtaining module 510, for obtaining the corresponding bases of RGB tri- of standard measuring signal described in same type respectively
Original coordinates after two kinds of color adjustment of other in color.
Space conversion matrix computing module 610, for distinguishing original after corresponding adjustment sit according to the RGB three primary colours
Mark, calculates the new space conversion matrix for obtaining the standard measuring signal corresponding types.
First information source modular converter 710, if for receiving the source signal with the standard measuring signal same type,
The source signal is converted into display device rgb signal according to the new space conversion matrix.
In second of possible embodiment, described device, based on Fig. 8, referring to Figure 12, in addition to：Be sequentially connected
Two coordinate obtaining modules 520, the 3rd coordinate obtaining module 620 and the second information source modular converter 720.
Second coordinate obtaining module 520, for obtaining the corresponding RGB of standard measuring signal described in same type respectively
Original coordinates after two kinds of color adjustment of other in three primary colours, original coordinates after the RGB three primary colours respectively corresponding adjustment are deposited
Enter display device coordinate file.
3rd coordinate obtaining module 620, for obtaining the corresponding RGB tri- of other kinds of standard measuring signal respectively
Original coordinates after correspondence adjustment are stored in the display device coordinate file by original coordinates after primary colours adjustment.
The second information source modular converter 720, if for receiving source signal, from the display device coordinate file
It is middle to search original coordinates after RGB three primary colours adjustment corresponding with the source signal, calculate the space for obtaining the source signal
Transition matrix, display device rgb signal is converted to by the source signal according to the space conversion matrix of the source signal.
In a kind of possible embodiment, the second information source modular converter 720, as shown in figure 13, including：Source type
Original coordinates searching unit 723 after judging unit 721, standard measuring signal determining unit 722 and adjustment.
Source type judging unit 721, the source type for judging the source signal.
Standard measuring signal determining unit 722, for according to the source type, it is determined that corresponding with the source signal
The type of standard measuring signal.
Original coordinates searching unit 723 after adjustment, for the type according to the standard measuring signal, sets from the display
Original coordinates after RGB three primary colours adjustment corresponding with same type standard measuring signal are searched in standby coordinate file.
Between the embodiment of each in this specification identical similar part mutually referring to.Especially for color gamut conversion
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to method
Explanation in embodiment.
Those skilled in the art will readily occur to its of the present invention after the disclosure that specification and practice are invented here is considered
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (10)
1. a kind of gamut conversion method, it is characterised in that methods described includes：
Standard measuring signal is converted into display device rgb signal according to the space conversion matrix calculated according to original coordinates；
Result coordinate corresponding with the display device rgb signal is searched, and, the standard measuring signal is obtained in display screen
Upper coordinates of targets to be shown；
Judge whether the difference of the result coordinate and coordinates of targets is more than default error；
If the difference is more than the default error, the original coordinates are adjusted, by the standard measuring signal according to according to tune
The space conversion matrix that whole rear original coordinates are calculated is converted to new display device rgb signal, until new display device RGB believes
The difference of number corresponding result coordinate and the coordinates of targets is less than or equal to the default error.
2. the method as described in claim 1, it is characterised in that methods described also includes：
Original after other two kinds of color adjustment in the corresponding RGB three primary colours of standard measuring signal described in same type sit is obtained respectively
Mark；
Distinguish original coordinates after corresponding adjustment according to the RGB three primary colours, calculating obtains the standard measuring signal correspondence class
The new space conversion matrix of type；
If receiving the source signal with the standard measuring signal same type, by the source signal according to the new sky
Between transition matrix be converted to display device rgb signal.
3. the method as described in claim 1, it is characterised in that methods described also includes：
Original after other two kinds of color adjustment in the corresponding RGB three primary colours of standard measuring signal described in same type sit is obtained respectively
The RGB three primary colours are distinguished original coordinates after corresponding adjustment and are stored in display device coordinate file by mark；
Original coordinates after the corresponding RGB three primary colours adjustment of other kinds of standard measuring signal are obtained respectively, after correspondence adjustment
Original coordinates are stored in the display device coordinate file；
If receiving source signal, RGB tri- corresponding with the source signal is searched from the display device coordinate file
Original coordinates after primary colours adjustment, calculate the space conversion matrix for obtaining the source signal, by the source signal according to described
The space conversion matrix of source signal is converted to display device rgb signal.
4. method as claimed in claim 3, it is characterised in that it is described searched from the display device coordinate file with it is described
Original coordinates after the corresponding RGB three primary colours adjustment of source signal, including：
Judge the source type of the source signal；
According to the source type, it is determined that the type of standard measuring signal corresponding with the source signal；
According to the type of the standard measuring signal, search and believe with same type standard testing from the display device coordinate file
Original coordinates after number corresponding RGB three primary colours adjustment.
5. the method as described in claim 1, it is characterised in that the adjustment original coordinates, including：
Calculate the ratio K of the difference and the default error；
Using 0.5K times of the difference original coordinates after adjustment are used as with the original coordinates sum.
6. method as claimed in claim 5, it is characterised in that described 0.5K times by the difference with the original coordinates it
With as original coordinates after adjustment, including：
N effective digitals are taken to the ratio of the difference and the default error, K ' is designated as, wherein, n and the result coordinate
Number of significant figures is identical；
Using the 0.5K ' of the difference times original coordinates after adjustment are used as with the original coordinates sum.
7. the method as described in claim 1, it is characterised in that the acquisition standard measuring signal is waited to show on a display screen
The coordinates of targets shown, including：
Standard measuring signal coordinates of targets to be shown on a display screen is searched from goal-selling coordinate file.
8. a kind of color gamut conversion device, it is characterised in that described device includes：
Standard measuring signal modular converter, for by standard measuring signal according to the space conversion matrix calculated according to original coordinates
Be converted to display device rgb signal；
As a result coordinate and coordinates of targets acquisition module, for searching result coordinate corresponding with the display device rgb signal, with
And, obtain standard measuring signal coordinates of targets to be shown on a display screen；
Judge module, for judging whether the difference of the result coordinate and coordinates of targets is more than default error；
Coordinate Adjusting module, if being more than the default error for the difference, adjusts the original coordinates, the standard is surveyed
Trial signal is converted to new display device rgb signal according to the space conversion matrix calculated according to original coordinates after adjustment, until
The difference of the corresponding result coordinate of new display device rgb signal and the coordinates of targets is less than or equal to the default mistake
Difference.
9. device as claimed in claim 8, it is characterised in that described device also includes：
First coordinate obtaining module, for obtaining its in the corresponding RGB three primary colours of standard measuring signal described in same type respectively
Original coordinates after his two kinds of color adjustment；
Space conversion matrix computing module, for distinguishing original coordinates after corresponding adjustment according to the RGB three primary colours, is calculated
To the new space conversion matrix of the standard measuring signal corresponding types；
First information source modular converter, if for receiving the source signal with the standard measuring signal same type, will be described
Source signal is converted to display device rgb signal according to the new space conversion matrix.
10. device as claimed in claim 8, it is characterised in that described device also includes：
Second coordinate obtaining module, for obtaining its in the corresponding RGB three primary colours of standard measuring signal described in same type respectively
The RGB three primary colours are distinguished original coordinates after corresponding adjustment and are stored in display device by original coordinates after his two kinds of color adjustment
Coordinate file；
3rd coordinate obtaining module, for obtaining respectively after the corresponding RGB three primary colours adjustment of other kinds of standard measuring signal
Original coordinates after correspondence adjustment are stored in the display device coordinate file by original coordinates；
Second information source modular converter, if for receiving source signal, searched and institute from the display device coordinate file
Original coordinates after the corresponding RGB three primary colours adjustment of source signal are stated, the space conversion matrix for obtaining the source signal is calculated, will
The source signal is converted to display device rgb signal according to the space conversion matrix of the source signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563992.2A CN107222733B (en) | 2017-07-12 | 2017-07-12 | Color gamut conversion method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563992.2A CN107222733B (en) | 2017-07-12 | 2017-07-12 | Color gamut conversion method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107222733A true CN107222733A (en) | 2017-09-29 |
| CN107222733B CN107222733B (en) | 2020-06-23 |
Family
ID=59952639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710563992.2A Active CN107222733B (en) | 2017-07-12 | 2017-07-12 | Color gamut conversion method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107222733B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299102A (en) * | 2019-07-09 | 2019-10-01 | 康佳集团股份有限公司 | A kind of method, display equipment and the storage medium of chip interior pretreatment color |
| CN110459176A (en) * | 2019-08-16 | 2019-11-15 | 合肥工业大学 | A kind of gamut conversion method of displayer |
| CN110767198A (en) * | 2019-09-29 | 2020-02-07 | 深圳吉迪思电子科技有限公司 | Color gamut correction method and system and display driving integrated circuit |
| CN113345386A (en) * | 2020-03-02 | 2021-09-03 | 苏州佳世达电通有限公司 | Display device and color adjustment method |
| CN113920961A (en) * | 2020-07-10 | 2022-01-11 | 苏州佳世达电通有限公司 | Display device and color adjustment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1796372A1 (en) * | 2005-12-10 | 2007-06-13 | Samsung Electronics Co., Ltd. | Image capture device |
| CN101794565A (en) * | 2010-03-31 | 2010-08-04 | 青岛海信电器股份有限公司 | Image display method, device and system |
| CN103634580A (en) * | 2013-12-19 | 2014-03-12 | 敦泰科技有限公司 | Color gamut adjusting method and device for color image |
| CN103747223A (en) * | 2014-01-15 | 2014-04-23 | 京东方科技集团股份有限公司 | Color gamut adjusting device, color gamut adjusting method and display system |
| CN103761948A (en) * | 2013-12-30 | 2014-04-30 | Tcl显示科技（惠州）有限公司 | White balance debugging method and device and display method and device of displayer |
-
2017
- 2017-07-12 CN CN201710563992.2A patent/CN107222733B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1796372A1 (en) * | 2005-12-10 | 2007-06-13 | Samsung Electronics Co., Ltd. | Image capture device |
| CN101794565A (en) * | 2010-03-31 | 2010-08-04 | 青岛海信电器股份有限公司 | Image display method, device and system |
| CN103634580A (en) * | 2013-12-19 | 2014-03-12 | 敦泰科技有限公司 | Color gamut adjusting method and device for color image |
| CN103761948A (en) * | 2013-12-30 | 2014-04-30 | Tcl显示科技（惠州）有限公司 | White balance debugging method and device and display method and device of displayer |
| CN103747223A (en) * | 2014-01-15 | 2014-04-23 | 京东方科技集团股份有限公司 | Color gamut adjusting device, color gamut adjusting method and display system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299102A (en) * | 2019-07-09 | 2019-10-01 | 康佳集团股份有限公司 | A kind of method, display equipment and the storage medium of chip interior pretreatment color |
| CN110459176A (en) * | 2019-08-16 | 2019-11-15 | 合肥工业大学 | A kind of gamut conversion method of displayer |
| CN110767198A (en) * | 2019-09-29 | 2020-02-07 | 深圳吉迪思电子科技有限公司 | Color gamut correction method and system and display driving integrated circuit |
| CN113345386A (en) * | 2020-03-02 | 2021-09-03 | 苏州佳世达电通有限公司 | Display device and color adjustment method |
| CN113920961A (en) * | 2020-07-10 | 2022-01-11 | 苏州佳世达电通有限公司 | Display device and color adjustment method |
| CN113920961B (en) * | 2020-07-10 | 2023-03-03 | 苏州佳世达电通有限公司 | Display device and color adjustment method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107222733B (en) | 2020-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107222733A (en) | A kind of gamut conversion method and device | |
| US9659388B1 (en) | White point calibration and gamut mapping for a display | |
| CN105827897B (en) | Adjust card manufacturing method, system, debugging color correction matrix method and apparatus | |
| WO2020199800A1 (en) | Display brightness adjustment method and related devices | |
| US9646392B2 (en) | Method and device of constructing uniform color space directly from raw camera RGB | |
| CN110197642A (en) | The bearing calibration of the acquisition methods, display of three primary colours gamma correction relationship and means for correcting | |
| JP7068905B2 (en) | Gradation correction data creation device, gradation correction device, electronic device and gradation correction data creation method | |
| CN107146572A (en) | Display screen bearing calibration and its system, computer-readable recording medium | |
| CN110213556B (en) | Automatic white balance method and system in monochrome scene, storage medium and terminal | |
| US9208750B2 (en) | Color temperature adjusting method of display device | |
| CN109064966A (en) | A kind of driving method and driving chip, display device of display panel | |
| CN101719359A (en) | Method for regulating color distribution and color distribution module | |
| CN109286802A (en) | Color gamut matching method, device, display terminal and readable storage medium storing program for executing | |
| WO2018049753A1 (en) | Color gamut expansion system and method | |
| CN106409212A (en) | Gamma curve adjustment method and device | |
| CN110349097A (en) | The color enhancement method and image processing apparatus of the significant property of image | |
| US9626775B1 (en) | White point calibration and gamut mapping for a display | |
| TWI720862B (en) | Display device and color adjusting method | |
| JP2008123504A (en) | Image processor and method thereof | |
| CN106981277B (en) | The method of adjustment of tone for display, apparatus and system | |
| CN106296614A (en) | Image processing apparatus and image processing method | |
| CN100535984C (en) | Color image enhancing device and method | |
| CN110113590A (en) | A kind of conversion method and device of image color space | |
| TW550620B (en) | Color tuning device and method of plasma display panel | |
| CN116092423A (en) | Color correction method and device for display panel |
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 | ||
| CB02 | Change of applicant information |
Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant after: Hisense Video Technology Co.,Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant before: HISENSE ELECTRIC Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |