CN115918066A

CN115918066A - Display method and device and electronic equipment

Info

Publication number: CN115918066A
Application number: CN202080103365.0A
Authority: CN
Inventors: 刘洋; 刘海啸; 李睿哲
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2023-04-04
Also published as: WO2022040889A1

Abstract

Embodiments of the present application provide a display method, device and electronic equipment. Including: obtaining the first RGB of the first pixel to be displayed; obtaining the third display lookup table LUT corresponding to the first application mode, the third LUT is generated according to the fusion of the first LUT and the second LUT corresponding to the first application mode, and the third The LUT includes a one-to-one correspondence between a plurality of first initial RGBs and the first display RGB; the first LUT includes a one-to-one mapping relationship between a plurality of first initial RGBs and a target RGB, and the second LUT includes a plurality of second initial RGBs and a display RGB One-to-one mapping relationship of RGB; determining the second RGB corresponding to the first RGB in the first application mode according to the third LUT, and sending the second RGB to the first display for display. The embodiment of the present application can effectively improve the efficiency and accuracy of the color space conversion performed by the display screen.

Description

PCT国内申请，说明书已公开。PCT domestic application, specification has been published.

Claims

A method of display processing, the method comprising:

acquiring a first RGB of a first pixel to be displayed;

acquiring a third display look-up table LUT corresponding to a first application mode, wherein the third LUT corresponding to the first application mode is generated by fusing the first LUT and a second LUT corresponding to the first application mode, the third LUT comprises a one-to-one correspondence relationship between a plurality of first initial RGB and first display RGB, the first initial RGB corresponds to initial chromaticity and brightness parameters, and the first display RGB corresponds to chromaticity and brightness parameters of the first application mode; the first LUT comprises a one-to-one mapping relation between a plurality of first initial RGB and target RGB, and the target RGB correspondingly specifies chroma and brightness parameters; the second LUT comprises a one-to-one mapping relationship between a plurality of second initial RGB and display RGB, the second initial RGB corresponds to the designated luminance and chrominance parameters, the display RGB is related to an application mode, the corresponding display RGB of the same second initial RGB in different application modes are different, and one application mode corresponds to one second LUT;

and determining a second RGB corresponding to the first RGB in the first application mode according to the third LUT, and sending the second RGB to a first display for displaying.
The method of claim 1, further comprising:

and acquiring a third LUT corresponding to a second application mode, wherein the third LUT corresponding to the second application mode is generated by fusion according to the first LUT and a second LUT corresponding to the second application mode.
The method according to claim 1 or 2, characterized in that the method further comprises:

retrieving the first LUT from a memory; or

Receiving the first LUT from a server; or

And receiving the corresponding target RGB from the server or acquiring the corresponding target RGB from the memory according to the preset first initial RGB, and further determining the first LUT.
The method according to any one of claims 1-3, further comprising:

acquiring a second LUT corresponding to the first application mode from a plurality of second LUTs stored in the memory; or receiving a second LUT corresponding to the first application mode from the server.
The method according to any one of claims 1-4, further comprising: receiving an updated second LUT from the server.
The method of claim 5, wherein the receiving an updated second LUT from the server comprises: receiving the updated second LUT from the server at a preset time or upon receiving a preset instruction.
The method of any of claims 1-6, wherein obtaining the third LUT comprises:

acquiring a first initial RGB in the first LUT and the corresponding target RGB;

determining real-time first display RGB obtained by mapping the target RGB according to the second LUT;

generating the third LUT comprising a mapping of the first initial RGB and the first display RGB.
The method of any of claims 1-7, wherein obtaining the first LUT comprises:

converting the first initial RGB to obtain intermediate RGB;

performing iterative transformation on the intermediate RGB according to a preset step length to obtain the target RGB;

and determining the first LUT according to the one-to-one mapping relation of the first initial RGB and the target RGB.
The method of claim 8, wherein the iteratively transforming the intermediate RGB by a preset step size to obtain the target RGB comprises:

s1: according to the preset step length to RGB _i Carrying out transformation and obtaining the corresponding chroma and brightness parameter change values;

s2: obtaining RGB according to the preset step length _i+1 According to said RGB _i Obtaining the RGB according to the corresponding intermediate chroma and brightness parameters and the chroma and brightness parameter variation values _i+1 Corresponding intermediate chrominance and luminance parameters;

s3: judging the RGB _i+1 Whether the difference value between the corresponding intermediate chroma and brightness parameter and the designated chroma and brightness parameter is smaller than a preset threshold value or not; if the RGB _i+1 If the difference between the corresponding intermediate chroma and brightness parameter and the designated chroma and brightness parameter is not less than a preset threshold value, making i = i +1, and repeatedly executing S1-S3 until the RGB is reached _i+1 The difference value between the corresponding intermediate chroma and brightness parameter and the designated chroma and brightness parameter is less than a preset threshold value, and when i =1, the RGB _i Is the intermediate RGB.
The method of claim 9, wherein the RGB is based on the RGB _i Obtaining the RGB according to the corresponding intermediate chroma and brightness parameters and the chroma and brightness parameter variation values _i+1 Corresponding intermediate chroma and brightness parameters, including RGB calculated according to the following formula _i+1 Corresponding intermediate chrominance and luminance parameters:

wherein said xyY _i+1 Is the RGB _i+1 Corresponding intermediate chrominance and luminance parameters, said xyY _i Is the RGB _i Corresponding intermediate chroma and brightness parameters, wherein RGB comprises R parameter, G parameter and B parameter, and Δ R, Δ G, and Δ B are the preset step length, Δ x, of the R parameter, the G parameter and the B parameter, respectively _R Δy _R For the R parameter is as followsAccording to the change value of the chromaticity parameter, delta Y, caused by the preset step length iteration _R For the value of the change of the brightness parameter caused by the iteration of the R parameter according to the preset step length, the delta x _G ，Δy _G A chrominance parameter variation value delta Y is generated for the G parameter according to the preset step length iteration _G The change value of the brightness parameter caused by the G parameter according to the preset step length iteration is delta x _B ，Δy _B A chrominance parameter variation value delta Y is generated for the B parameter according to the preset step length iteration _B And the brightness parameter change value is the brightness parameter change value caused by the B parameter iteration according to the preset step length.
The method according to any of claims 8-10, wherein said converting said initial RGB to obtain intermediate RGB comprises:

performing Gamma transformation on the first initial RGB based on a first Gamma value to obtain a first linear RGB;

converting the first linear rgb according to a first transformation matrix to obtain the specified chrominance and luminance parameters;

converting the specified luminance and chrominance parameters according to a second transformation matrix to obtain a second linear rgb, wherein the second transformation matrix is generated according to the measured luminance parameters of the first display;

inverse Gamma transforming the second linear RGB based on a second Gamma value determined from measured brightness parameters of the first display to obtain the intermediate RGB.
An apparatus for display processing, the apparatus comprising:

the display device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a first RGB of a first pixel to be displayed;

the processing module is used for acquiring a third display look-up table LUT corresponding to a first application mode, the third LUT corresponding to the first application mode is generated by fusion according to the first LUT and a second LUT corresponding to the first application mode, the third LUT comprises a one-to-one correspondence relationship between a plurality of first initial RGB and first display RGB, the first initial RGB corresponds to an initial chromaticity and brightness parameter, and the first display RGB corresponds to a chromaticity and brightness parameter of the first application mode; the first LUT comprises a one-to-one mapping relationship between a first plurality of initial RGB and target RGB, wherein the target RGB correspondingly specifies chromaticity and brightness parameters; the second LUT comprises a one-to-one mapping relationship between a plurality of second initial RGB and display RGB, the second initial RGB corresponds to the designated luminance and chrominance parameters, the display RGB is related to an application mode, the display RGB corresponding to the same second initial RGB in different application modes is different, and one application mode corresponds to one second LUT;

the processing module is further configured to determine, according to the third LUT, a second RGB corresponding to the first RGB in the first application mode, and send the second RGB to the first display for display.
The apparatus of claim 12, wherein the processing module is further configured to: and acquiring a third LUT corresponding to a second application mode, wherein the third LUT corresponding to the second application mode is generated by fusing the first LUT and the second LUT corresponding to the second application mode.
The apparatus of claim 12 or 13, wherein the obtaining module is further configured to:

retrieving the first LUT from a memory; or

Receiving the first LUT from a server; or

And receiving the corresponding target RGB from the server or acquiring the corresponding target RGB from the memory according to the preset first initial RGB, and further determining the first LUT.
The apparatus according to any of claims 12-14, wherein the obtaining module is further configured to:

obtaining a second LUT corresponding to the first application mode from a plurality of second LUTs stored by the memory; or receiving a second LUT corresponding to the first application mode from the server.
The apparatus of any one of claims 12-15, wherein the obtaining module is further configured to: receiving an updated second LUT from the server.
The apparatus of claim 16, wherein the obtaining module is specifically configured to: receiving the updated second LUT from the server at a preset time or upon receiving a preset instruction.
The apparatus according to any one of claims 12 to 17, wherein the processing module is specifically configured to:

acquiring a first initial RGB in the first LUT and the corresponding target RGB;

determining real-time first display RGB obtained by mapping the target RGB according to the second LUT;

generating the third LUT comprising a mapping of the first initial RGB and the first display RGB.
The apparatus according to any one of claims 12 to 18, wherein the processing module is specifically configured to:

converting the first initial RGB to obtain intermediate RGB;

performing iterative transformation on the intermediate RGB according to a preset step length to obtain the target RGB;

and determining the first LUT according to the one-to-one mapping relation of the first initial RGB and the target RGB.
The apparatus according to claim 19, wherein the processing module is specifically configured to:

s1: converting the RGBI according to the preset step length, and obtaining a corresponding chromaticity and brightness parameter change value;

s2: obtaining RGBI +1 according to the preset step length, and obtaining intermediate chromaticity and brightness parameters corresponding to the RGBI +1 according to the intermediate chromaticity and brightness parameters corresponding to the RGBI and the chromaticity and brightness parameter variation values;

s3: judging whether the difference value between the intermediate chromaticity and brightness parameters corresponding to the RGBI +1 and the designated chromaticity and brightness parameters is smaller than a preset threshold value or not; if the difference value between the intermediate chromaticity and luminance parameter corresponding to the RGBi +1 and the designated chromaticity and luminance parameter is not less than a preset threshold, i = i +1, and S1-S3 are repeatedly executed until the difference value between the intermediate chromaticity and luminance parameter corresponding to the RGBi +1 and the designated chromaticity and luminance parameter is less than the preset threshold, and when i =1, the RGBi is the intermediate RGB.
The apparatus of claim 20, wherein the processing module is specifically configured to: the RGB is obtained by calculation according to the following formula _i+1 Corresponding intermediate chrominance and luminance parameters:

wherein said xyY _i+1 Is the RGB _i+1 Corresponding intermediate chrominance and luminance parameters, said xyY _i As the RGB _i Corresponding intermediate chroma and brightness parameters, wherein the RGB comprises R parameters, G parameters and B parameters, the delta R, the delta G and the delta B are the R parameters, the preset step length of the G parameters and the preset step length of the B parameters, and the delta x _R ，Δy _R The variation value of the chromaticity parameter, delta Y, caused by the iteration of the R parameter according to the preset step length _R The delta x is a brightness parameter variation value caused by the iteration of the R parameter according to the preset step length _G ，Δy _G A chrominance parameter variation value delta Y is generated for the G parameter according to the preset step length iteration _G The change value of the brightness parameter, delta x, caused by the iteration of the G parameter according to the preset step length _B ，Δy _B Caused by iteration of said B parameter according to said preset step lengthValue of variation of a colorimetric parameter, Δ Y _B And the brightness parameter change value is the brightness parameter change value caused by the B parameter iteration according to the preset step length.
The apparatus according to any one of claims 19 to 21, wherein the processing module is specifically configured to:

performing Gamma transformation on the first initial RGB based on a first Gamma value to obtain a first linear RGB;

converting the first linear rgb according to a first transformation matrix to obtain the specified chrominance and luminance parameters;

converting the specified luminance and chrominance parameters according to a second transformation matrix to obtain a second linear rgb, wherein the second transformation matrix is generated according to the measured luminance parameters of the first display;

performing an inverse Gamma transformation on the second linear RGB based on a second Gamma value determined from a measured brightness parameter of the first display to obtain the intermediate RGB.
An apparatus for display processing, the apparatus comprising a processor and an interface circuit coupled to the processor, the processor being configured to execute code instructions stored in a memory to perform the method of any of claims 1 to 11.
A computer-readable storage medium, in which program instructions are stored, which, when run on a computer or a processor, cause the computer or the processor to carry out the method according to any one of claims 1-11.