WO2019019856A1 - Color gamut mapping method, display terminal and computer readable storage medium - Google Patents

Abstract

Disclosed by the present application is a color gamut mapping method, a display terminal and a computer readable storage medium, wherein the color gamut mapping method comprises the following steps: acquiring an image signal pixel value to be sent of a signal source terminal and an image signal pixel value to be outputted of a display terminal respectively; establishing a mapping relationship between the image signal pixel value to be sent of the signal source terminal and the image signal pixel value to be outputted of the display terminal according to a preset algorithm; according to the mapping relationship, obtaining an image signal pixel value to be displayed by the display terminal, and converting the image signal pixel value into an image signal so that the display terminal may carry out display.

Description

Color gamut mapping method, display terminal and computer readable storage medium Technical field

The present application relates to the field of image processing technologies, and in particular, to a color gamut mapping method, a display terminal, and a computer readable storage medium.

Background technique

The performance of image color can be measured by the color gamut. Color gamut is a method of encoding color, and also refers to the sum of colors that a technical system can produce, such as NTSC, BT709, BT2020 color gamut. Different systems or devices, with large or small gamuts, large color gamut devices or systems, can display more colors, and devices with smaller gamuts or systems can display less color. The same source is displayed on different models of displays, and the color performance tends to be different.

The color transmission of the broadcast television system is mainly from the transmission color gamut to the display color gamut, the transmission color gamut is the color space transmitted by the broadcast television system, and the display color gamut is the color space that the display can cover. With the development of display terminal technology, its color gamut range is also expanding. The existing display color gamut is usually larger than the transmission color gamut. The display color gamut cannot completely contain the transmission color gamut, causing color distortion and affecting the display effect of the display.

Application content

The main purpose of the present application is to provide a color gamut mapping method, a display terminal, and a computer readable storage medium, which are intended to solve the technical problem of the existing color gamut distortion and affect the display effect of the display.

To achieve the above objective, a color gamut mapping method provided by the present application includes the following steps:

Obtaining, respectively, a pixel value of the image signal to be sent at the source end and a pixel value of the image signal to be output at the display end;

Establishing, according to a preset algorithm, a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end;

The image signal pixel value to be displayed on the display end is obtained according to the mapping relationship, and converted into an image signal for display by the display end.

Optionally, the step of separately acquiring the pixel value of the image signal to be sent at the source end and the pixel value of the image signal to be output at the display end includes:

Obtaining a pixel value of the input image signal at the source end, and converting the pixel value of the input image signal of the source end into a pixel value of the image signal to be transmitted at the source end according to a preset color space conversion matrix;

Obtaining an input image signal pixel value of the display end, and converting the input image signal pixel value of the display end into a pixel value of the image signal to be output at the display end according to a preset color space conversion matrix.

Optionally, the input image signal pixel value of the source end is represented by RGB coordinates, the pixel value of the image signal to be transmitted at the source end is represented by Lab coordinates, and the preset color space conversion matrix is represented by color coordinate coordinates. ;

The input image signal pixel value of the display end is represented by RGB coordinates, the pixel value of the image signal to be outputted at the display end is represented by Lab coordinates, and the preset color space conversion matrix is represented by color coordinate coordinates.

Optionally, after the step of separately acquiring the pixel value of the image signal to be sent at the source end and the pixel value of the image signal to be output at the display end, the method further includes:

And storing the pixel value of the image signal to be sent at the source end in a preset source end database;

The pixel value of the image signal to be output at the display end is stored in a preset display end database.

Optionally, the step of establishing a mapping relationship between the pixel value of the image signal to be sent and the pixel value of the image signal to be output at the source end according to the preset algorithm includes:

Obtaining a pixel value of the image signal to be sent at any of the source ends in the preset source database;

Obtaining, according to a preset algorithm, a pixel value of the image signal to be output of the display end with a minimum color difference between the pixel value of the image signal to be sent in the preset display end database and the signal source to be sent, and establishing the source end a mapping relationship between the pixel value of the image signal to be transmitted and the pixel value of the image signal to be output of the display end with the smallest color difference.

Optionally, after the step of establishing a mapping relationship between the pixel value of the image signal to be sent and the pixel value of the image signal to be output on the display end according to the preset algorithm, the method further includes:

The mapping relationship is stored in a preset memory.

Optionally, the step of obtaining, according to the mapping relationship, a pixel value of an image signal to be displayed on the display end, and converting the image signal to an image signal for display on the display end comprises:

Obtaining an image signal pixel value input to the source end, and obtaining, according to the stored mapping relationship, a pixel value of an image signal to be displayed at a display end with a minimum color difference corresponding to an image signal pixel value of the source end;

The image signal pixel values to be displayed on the display side are converted into image signals for display on the display side.

Optionally, the preset algorithm is calculated using a ΔE2000 formula.

The application further provides a display terminal, the display terminal comprising: a memory, a processor, and a gamut mapping program stored on the memory and operable on the processor, the gamut mapping program being The steps of the gamut mapping method as described above are implemented when the processor enters.

The present application also provides a computer readable storage medium having stored thereon a computer program that, when accessed by a processor, implements the steps of the gamut mapping method as described above.

In the technical solution provided by the present application, a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end is established according to a preset algorithm, and then the display is obtained according to the mapping relationship. The image signal pixel value to be displayed is converted into an image signal for display on the display end, and the small color gamut of the source end is faithfully restored in the large display end color gamut, so that the chromatic aberration before and after the mapping is kept to a minimum, and the display end is reduced. Color distortion ensures the display of the display terminal.

DRAWINGS

1 is a schematic flowchart of a first embodiment of a color gamut mapping method according to the present application;

2 is a schematic flowchart of a step of separately obtaining a pixel value of an image signal to be transmitted at a source end and a pixel value of an image signal to be outputted at a display end in the second embodiment of the color gamut mapping method of the present application;

3 is a schematic flowchart of a step of establishing a mapping relationship in a third embodiment of the color gamut mapping method of the present application;

4 is a schematic flowchart of a fourth embodiment of a color gamut mapping method according to the present application;

FIG. 5 is a schematic diagram of a module of a display terminal of the present application.

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

Detailed ways

It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

Referring to FIG. 1, in a first embodiment of the present application, the gamut mapping method includes the following steps:

Step S10, respectively acquiring the pixel value of the image signal to be sent at the source end and the pixel value of the image signal to be output at the display end;

The gamut refers to the range of the number of colors that can be expressed by a certain color mode. It is a method of encoding colors. Common color modes include RGB, CMYK, and Lab. The pixel value of the image signal to be transmitted at the source end may be a color gamut pixel value in any one of the above three color modes. It can be understood that the pixel value of the image signal to be output on the display end may also be the color gamut pixel value in any one of the three color modes of RGB, CMYK, and Lab.

Step S20, establishing a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end according to a preset algorithm;

In this embodiment, the preset algorithm is calculated by using a ΔE2000 formula:

Among them, ΔL, ΔC, and ΔH are luminance differences, saturation differences, and hue differences in the chromaticity space in the Lab color mode.

Specifically, the mapping relationship between the pixel values of the image signals to be outputted on the display end with the smallest color difference corresponding to the pixel value of the image signal to be transmitted at any source end can be calculated by the above algorithm.

Step S30: Obtain a pixel value of the image signal to be displayed on the display end according to the mapping relationship, and convert the image signal into an image signal for display by the display end.

It can be understood that the establishment of the mapping relationship may be completed online or when the display end is offline. When the mapping relationship between the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be outputted at the display end is completed according to a preset algorithm, the image signal pixel values of all input source terminals are according to the mapping relationship. The pixel value of the image signal to be displayed corresponding to the display end with the smallest color difference in the display end is calculated, and then converted into an image signal for display by the display end.

In this embodiment, a mapping relationship between the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be outputted at the display end is established according to a preset algorithm, and then the display end is to be displayed according to the mapping relationship. The image signal pixel value is converted into an image signal for display on the display end, which realizes faithful restoration of the small color gamut of the source end in the large display end color gamut, minimizes the chromatic aberration before and after the mapping, and reduces the color distortion of the display end. Make sure that the display of the terminal is displayed.

Further, referring to FIG. 2, based on the first embodiment, in the second embodiment of the present application, the step S10 includes:

Step S11: Acquire an input image signal pixel value of the source end, and convert the input image signal pixel value of the source end to a pixel value of the image signal to be transmitted at the source end according to a preset color space conversion matrix;

Step S12: Acquire an input image signal pixel value of the display end, and convert the input image signal pixel value of the display end into a pixel value of the image signal to be output at the display end according to a preset color space conversion matrix.

It should be noted that the pixel value of the input image signal at the source end is represented by RGB coordinates, and the pixel value of the image signal to be transmitted at the source end is represented by Lab coordinates, and the preset color space conversion matrix is an XYZ color space matrix. , expressed in color coordinates.

That is, the RGB coordinates of the input image signal pixel values of the source end are obtained, the RGB coordinates are converted into the color system coordinates, and the color system coordinates are converted into Lab coordinates, so that the source end The pixel value of the image signal to be transmitted is represented by Lab coordinates.

Specifically, the RGB coordinates of the pixel value of the input image signal at the source end are first converted into the color coordinate system, that is, [0, 0, 0] to [255, 255, 255] vector space, where [0, 0, 0] The representative order is 1, [0, 0, 1] represents the order of 2, and so on, and the order is 1 to 16777216 (256 * 256 * 256). Then, the source XYZ color space matrix is calculated by calculating the x and y coordinate points of the Red, Green, Blue, and White points on the source side, and then the color coordinate of the XYZ color space matrix is converted into the Lab coordinate. .

Further, the pixel value of the image signal to be transmitted at the source end is stored in a preset source database.

It can be understood that the input image signal pixel value of the display end is represented by RGB coordinates, the pixel value of the image signal to be outputted at the display end is represented by Lab coordinates, and the preset color space conversion matrix is an XYZ color space matrix. Color coordinate representation.

That is, the RGB coordinates of the pixel value of the input image signal at the display end are acquired, the RGB coordinates are converted into the color coordinate system, and the color system coordinate is converted into the Lab coordinate, so that the display end is to be output. Image signal pixel values are expressed in Lab coordinates.

Specifically, the RGB coordinates of the pixel value of the input image signal at the display end are first converted into the color coordinate system, that is, [0, 0, 0] to [255, 255, 255] vector space, where [0, 0, 0] represents The order is 1, [0, 0, 1] represents the order of 2, and so on, in order from 1 to 16777216 (256 * 256 * 256). Then, the display end XYZ color matrix is calculated by calculating the x and y coordinate points of the Red, Green, Blue, and White points on the display side, and then converting the XYZ color matrix into Lab coordinates.

Further, the pixel value of the image signal to be output at the display end is stored in a preset display end database.

In this embodiment, the pixel value of the input image signal of the source end is converted into the pixel value of the image signal to be transmitted at the source end by using a preset color space matrix, and the pixel value of the input image signal of the display end is converted into a display end. The image signal pixel value is output, that is, the same matrix algorithm is adopted, and the consistency between the source end and the display end gamut is realized.

Further, referring to FIG. 3, based on the second embodiment, in the third embodiment of the present application, the step S30 includes:

Step S31: Acquire a pixel value of an image signal to be sent of any of the source ends in the preset source database;

Step S32: Acquire, according to a preset algorithm, a pixel value of the image signal to be output of the display end with a minimum color difference between the pixel values of the image signal to be transmitted in the preset display end database and the signal source to be sent, and establish the a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output of the display end with the smallest color difference.

For example, obtaining image signal values m (Rsm, Gsm, Bsm) of the image signal to be transmitted at any of the source ends in the source database, and then calculating a pixel value of the image signal to be outputted at each of the display terminals and the letter by using a ΔE2000 formula. a color difference between pixel values m (Rsm, Gsm, Bsm) of the image signal to be transmitted at the source end, and acquiring a display end of the display end having the smallest color difference between the pixel values m (Rsm, Gsm, Bsm) of the image signal to be transmitted at the source end The image signal pixel value n (Rdn, Gdn, Bdn) further establishes a mapping relationship between m (Rsm, Gsm, Bsm) and n (Rdn, Gdn, Bdn).

Further, the ΔE2000 formula can be used to establish a mapping relationship between the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output of the display end with the smallest color difference, and the display end of the display terminal having the smallest color difference The pixel value of the image signal to be output is converted into an image signal for display on the display end, so that the color difference between the pixel value of the image signal to be output at the display end and the pixel value of the image signal to be transmitted at the source end is minimized, thereby avoiding the problem of negative value and overflow. Reduce re-color distortion.

Further, referring to FIG. 4, based on the foregoing embodiment, in the fourth embodiment of the present application, the gamut mapping method includes:

Step S10, respectively acquiring the pixel value of the image signal to be sent at the source end and the pixel value of the image signal to be output at the display end;

Step S20, establishing a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end according to a preset algorithm;

Step S40, storing the mapping relationship in a preset memory;

Step S31: Acquire an image signal pixel value input to the source end, and obtain, according to the stored mapping relationship, a pixel value of an image signal to be displayed at a display end with a minimum color difference corresponding to an image signal pixel value of the source end;

Step S32, converting the image signal pixel value to be displayed on the display end into an image signal for display on the display end.

It can be understood that the mapping relationship between the image signal pixel value of each of the source terminals and the image signal pixel value of the display terminal to be displayed with the smallest color difference is obtained by the ΔE2000 formula calculation, and the mapping relationship is stored in In the default memory. That is to say, the foregoing mapping relationship may be pre-completed in a state in which the source end and the display end are offline, and the mapping relationship established in advance is stored in a preset memory.

Further, when the source end and the display end are in an online state, acquiring an image signal pixel value input to the source end, and acquiring the mapping relationship stored in a preset memory, and further according to the mapping The relationship is that the pixel value of the image signal to be displayed on the display end with the smallest color difference corresponding to the pixel value of the image signal at the source end can be quickly obtained, and the image signal pixel value to be displayed on the display end is converted into an image signal for display. display.

In this embodiment, by storing the mapping relationship in a preset memory, the mapping relationship may be pre-completed in a state where the source end and the display end are offline, and then when the source end is When the display end is in the online state, the mapping and output of the image signal gamut pixel value input by the source end can be quickly completed according to the stored mapping relationship, thereby saving the source end and the display end gamut. The time of the map.

In addition, in order to achieve the above object, the present application further provides a display terminal, including: a memory 105, a processor 101, and a gamut mapping stored on the memory 105 and operable on the processor 101. program.

As shown in FIG. 5, in some embodiments, the display terminal may include a processor 101, such as a CPU, a network interface 104, a user interface 103, a memory 105, and a communication bus 102. Among them, the communication bus 102 is used to implement connection communication between these components. The user interface 103 may include a display, an input unit such as a remote controller, and the optional user interface 103 may further include a standard wired interface and a wireless interface. In specific use, the front end acquires data through the user interface 103. The network interface 104 can optionally include a standard wired interface, a wireless interface (such as a WI-FI interface). The memory 105 may be a high speed RAM memory or a non-volatile memory such as a magnetic disk memory. The memory 105 can also optionally be a storage device independent of the aforementioned processor 101.

When the color gamut mapping program is accessed by the processor 101, the steps of the gamut mapping method described in the first embodiment are implemented, which specifically includes:

Step S10, respectively acquiring the pixel value of the image signal to be sent at the source end and the pixel value of the image signal to be output at the display end;

Step S20, establishing a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end according to a preset algorithm;

Step S30: Obtain a pixel value of the image signal to be displayed on the display end according to the mapping relationship, and convert the image signal into an image signal for display by the display end.

Further, when the gamut mapping program is executed by the processor 101, the step S10 further implements:

Step S11: Acquire an input image signal pixel value of the source end, and convert the input image signal pixel value of the source end to a pixel value of the image signal to be transmitted at the source end according to a preset color space conversion matrix;

Step S12: Acquire an input image signal pixel value of the display end, and convert the input image signal pixel value of the display end into a pixel value of the image signal to be output at the display end according to a preset color space conversion matrix.

Further, when the gamut mapping program is executed by the processor 101, the step S20 further implements:

Step S21: Acquire a pixel value of an image signal to be sent of any of the source ends in the preset source database;

Step S22: Acquire, according to a preset algorithm, a pixel value of the to-be-output image signal of the display end that has the smallest color difference between the pixel value of the image signal to be transmitted and the pixel value of the signal to be transmitted in the preset display database, and establish the a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output of the display end with the smallest color difference.

Further, the step of implementing the gamut mapping method in the fifth embodiment, when the gamut mapping program is accessed by the processor 101, specifically includes:

Step S10, respectively acquiring the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end;

Step S20, establishing a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end according to a preset algorithm;

Step S40, storing the mapping relationship in a preset memory;

Step S31: Acquire an image signal pixel value input to the source end, and obtain, according to the stored mapping relationship, a pixel value of an image signal to be displayed at a display end with a minimum color difference corresponding to an image signal pixel value of the source end;

Step S32, converting the image signal pixel value to be displayed on the display end into an image signal for display on the display end.

It will be understood by those skilled in the art that the terminal structure shown in FIG. 5 does not constitute a limitation to the terminal, and may include more or less components than those illustrated, or a combination of certain components, or different component arrangements.

The present application also provides a computer readable storage medium having stored thereon a computer program that, when accessed by a processor, implements the colors described in the first to fourth embodiments above The steps of the domain mapping method.

The technical solutions of the television and the computer readable storage medium of the present embodiment include at least all the technical solutions of the foregoing gamut mapping method embodiments, and therefore have at least the technical effects of the foregoing embodiments, and are not further described herein.

It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, item, or system. An element defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in a process, method, article, or system that includes the element, without further limitation.

The serial numbers of the embodiments of the present application are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM as described above). , a disk, an optical disk, including a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to enter the method described in the various embodiments of the present application.

The above is only a preferred embodiment of the present application, and is not intended to limit the scope of the patent application, and the equivalent structure or equivalent process transformations made by the specification and the drawings of the present application, or directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of this application.

Claims (20)

A gamut mapping method, comprising the following steps: Obtaining, respectively, a pixel value of the image signal to be sent at the source end and a pixel value of the image signal to be output at the display end; Establishing, according to a preset algorithm, a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end; The image signal pixel value to be displayed on the display end is obtained according to the mapping relationship, and converted into an image signal for display by the display end. The gamut mapping method according to claim 1, wherein the step of respectively acquiring the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end comprises: Obtaining a pixel value of the input image signal at the source end, and converting the pixel value of the input image signal of the source end into a pixel value of the image signal to be transmitted at the source end according to a preset color space conversion matrix; Obtaining an input image signal pixel value of the display end, and converting the input image signal pixel value of the display end into a pixel value of the image signal to be output at the display end according to a preset color space conversion matrix. The color gamut mapping method according to claim 2, wherein the pixel value of the input image signal at the source end is represented by RGB coordinates, and the pixel value of the image signal to be transmitted at the source end is represented by Lab coordinates, the preset The color space conversion matrix is represented by a color coordinate system; The input image signal pixel value of the display end is represented by RGB coordinates, the pixel value of the image signal to be outputted at the display end is represented by Lab coordinates, and the preset color space conversion matrix is represented by color coordinate coordinates. The color gamut mapping method according to claim 3, wherein the step of separately acquiring the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end further comprises: And storing the pixel value of the image signal to be sent at the source end in a preset source end database; The pixel value of the image signal to be output at the display end is stored in a preset display end database. The gamut mapping method according to claim 4, wherein the step of establishing a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end according to a preset algorithm include: Obtaining a pixel value of the image signal to be sent at any of the source ends in the preset source database; Obtaining, according to a preset algorithm, a pixel value of the image signal to be output of the display end with a minimum color difference between the pixel value of the image signal to be sent in the preset display end database and the signal source to be sent, and establishing the source end a mapping relationship between the pixel value of the image signal to be transmitted and the pixel value of the image signal to be output of the display end with the smallest color difference. The gamut mapping method according to claim 5, wherein the step of establishing a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end according to a preset algorithm It also includes: The mapping relationship is stored in a preset memory. The gamut mapping method according to claim 6, wherein the step of deriving the pixel value of the image signal to be displayed on the display end according to the mapping relationship and converting the image signal into an image signal for display on the display end comprises: Obtaining an image signal pixel value input to the source end, and obtaining, according to the stored mapping relationship, a pixel value of an image signal to be displayed at a display end with a minimum color difference corresponding to an image signal pixel value of the source end; Converting image signal pixel values to be displayed on the display end into image signals for display on the display side. The gamut mapping method of claim 1, wherein the preset algorithm is calculated using a ΔE2000 formula. A display terminal, wherein the display terminal comprises: a memory, a processor, and a gamut mapping program stored on the memory and operable on the processor, the gamut mapping program being used by the processor The step of implementing the gamut mapping method when entering, the gamut mapping method includes the following steps: Obtaining, respectively, a pixel value of the image signal to be sent at the source end and a pixel value of the image signal to be output at the display end; Establishing, according to a preset algorithm, a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end; The image signal pixel value to be displayed on the display end is obtained according to the mapping relationship, and converted into an image signal for display by the display end. The display terminal according to claim 9, wherein the step of respectively acquiring the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end comprises: Obtaining a pixel value of the input image signal at the source end, and converting the pixel value of the input image signal of the source end into a pixel value of the image signal to be transmitted at the source end according to a preset color space conversion matrix; Obtaining an input image signal pixel value of the display end, and converting the input image signal pixel value of the display end into a pixel value of the image signal to be output at the display end according to a preset color space conversion matrix. The display terminal according to claim 10, wherein the input image signal pixel value of the source end is represented by RGB coordinates, and the pixel value of the image signal to be transmitted at the source end is represented by Lab coordinates, the preset color space. The conversion matrix is represented by the color coordinate system; The input image signal pixel value of the display end is represented by RGB coordinates, the pixel value of the image signal to be outputted at the display end is represented by Lab coordinates, and the preset color space conversion matrix is represented by color coordinate coordinates. The display terminal according to claim 11, wherein the step of separately acquiring the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end further comprises: And storing the pixel value of the image signal to be sent at the source end in a preset source end database; The pixel value of the image signal to be output at the display end is stored in a preset display end database. The display terminal according to claim 12, wherein the step of establishing a mapping relationship between a pixel value of the image signal to be transmitted and a pixel value of the image signal to be output of the display terminal according to the preset algorithm comprises: Obtaining a pixel value of the image signal to be sent at any of the source ends in the preset source database; Obtaining, according to a preset algorithm, a pixel value of the image signal to be output of the display end with a minimum color difference between the pixel value of the image signal to be sent in the preset display end database and the signal source to be sent, and establishing the source end a mapping relationship between the pixel value of the image signal to be transmitted and the pixel value of the image signal to be output of the display end with the smallest color difference. The display terminal according to claim 13, wherein the step of establishing a mapping relationship between a pixel value of the image signal to be transmitted of the source end and a pixel value of the image signal to be outputted at the display end according to a preset algorithm is further include: The mapping relationship is stored in a preset memory. The display terminal according to claim 14, wherein the step of deriving the pixel value of the image signal to be displayed on the display end according to the mapping relationship and converting the image signal into an image signal for display on the display end comprises: Obtaining an image signal pixel value input to the source end, and obtaining, according to the stored mapping relationship, a pixel value of an image signal to be displayed at a display end with a minimum color difference corresponding to an image signal pixel value of the source end; Converting image signal pixel values to be displayed on the display end into image signals for display on the display side. The display terminal of claim 9, wherein the preset algorithm is calculated using a ΔE2000 formula. A computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program being accessed by a processor to implement a color gamut mapping method, the color gamut mapping method comprising the steps of: Obtaining, respectively, a pixel value of the image signal to be sent at the source end and a pixel value of the image signal to be output at the display end; Establishing, according to a preset algorithm, a mapping relationship between a pixel value of the image signal to be transmitted at the source end and a pixel value of the image signal to be output at the display end; The image signal pixel value to be displayed on the display end is obtained according to the mapping relationship, and converted into an image signal for display by the display end. The computer readable storage medium according to claim 17, wherein the step of respectively acquiring the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end comprises: Obtaining a pixel value of the input image signal at the source end, and converting the pixel value of the input image signal of the source end into a pixel value of the image signal to be transmitted at the source end according to a preset color space conversion matrix; Obtaining an input image signal pixel value of the display end, and converting the input image signal pixel value of the display end into a pixel value of the image signal to be output at the display end according to a preset color space conversion matrix. The computer readable storage medium according to claim 18, wherein the input image signal pixel value of the source side is represented by RGB coordinates, and the pixel value of the image signal to be transmitted at the source end is represented by Lab coordinates, the preset The color space conversion matrix is represented by the color coordinate system; The input image signal pixel value of the display end is represented by RGB coordinates, the pixel value of the image signal to be outputted at the display end is represented by Lab coordinates, and the preset color space conversion matrix is represented by color coordinate coordinates. The computer readable storage medium as claimed in claim 19, wherein the step of separately obtaining the pixel value of the image signal to be transmitted at the source end and the pixel value of the image signal to be output at the display end further comprises: And storing the pixel value of the image signal to be sent at the source end in a preset source end database; The pixel value of the image signal to be output at the display end is stored in a preset display end database.

Images