CN115909981A - Color enhancement method and device, electronic equipment and storage medium - Google Patents

Abstract

A color enhancement method and device, electronic equipment, and a storage medium. The method is applied to electronic equipment, and the electronic equipment includes a screen. The method may include: acquiring first color data corresponding to an output image signal of the screen, and color data of the screen. The second color data corresponding to the domain, the second color data is obtained by performing a color test on the screen; the above-mentioned first color data is subjected to compensation gain processing to obtain the compensation color data; according to the compensation color data and the above-mentioned second color data data, determine a color gamut conversion parameter, and convert the color gamut of the above-mentioned output image signal according to the color gamut conversion parameter. By implementing the embodiments of the present application, the display performance of the screen of the electronic device can be effectively utilized, and the color effect of the output display image of the electronic device can be improved.

Description

Color enhancement method and device, electronic device, storage medium

technical field

The present application relates to the technical field of screen display, and in particular to a color enhancement method and device, electronic equipment, and a storage medium.

Background technique

Currently, electronic devices (such as smart phones, computers, televisions, etc.) usually need to output images according to a specified color gamut (or color space, color space, etc.) when outputting and displaying images through their screens. However, in practice, it is found that with the rapid replacement of electronic equipment, the color gamut that can be supported by electronic equipment is getting larger and larger, but the color gamut covered by the output image signal used to output the display image may be smaller, resulting in The full display performance of the screen of the electronic device cannot be effectively utilized, which reduces the color effect of the output display image of the electronic device.

Contents of the invention

The embodiment of the present application discloses a color enhancement method and device, an electronic device, and a storage medium, which can effectively utilize the display performance of the screen of the electronic device and improve the color effect of the output display image of the electronic device.

The first aspect of the embodiment of the present application discloses a color enhancement method, which is applied to electronic equipment, the electronic equipment includes a screen, and the method includes:

Acquiring first color data corresponding to the output image signal of the screen, and second color data corresponding to the color gamut of the screen, the second color data is obtained by performing a color test on the screen;

performing compensation gain processing on the first color data to obtain compensated color data;

Determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter.

The second aspect of the embodiment of the present application discloses a color enhancement device, which is applied to an electronic device, the electronic device includes a screen, and the color enhancement device includes:

An acquisition unit, configured to acquire first color data corresponding to the output image signal of the screen, and second color data corresponding to the color gamut of the screen, where the second color data is obtained by performing a color test on the screen of;

a compensation unit, configured to perform compensation gain processing on the first color data to obtain compensated color data;

A color gamut conversion unit, configured to determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter.

The third aspect of the embodiment of the present application discloses an electronic device, including a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor realizes the All or part of the steps in any color enhancement method disclosed in the first aspect of the embodiment.

The fourth aspect of the embodiment of the present application discloses a computer-readable storage medium, which stores a computer program, wherein, when the computer program is executed by a processor, any color enhancement method as disclosed in the first aspect of the embodiment of the present application is implemented All or some of the steps in .

Compared with related technologies, the embodiments of the present application have the following beneficial effects:

In the embodiment of the present application, the electronic device applying the color enhancement method may include a screen, and may acquire first color data corresponding to an output image signal of the screen and second color data corresponding to a color gamut of the screen. Wherein, the second color data is obtained by performing a color test on the screen. On this basis, the electronic device can perform compensation gain processing on the above-mentioned first color data to obtain corresponding compensation color data, and then can determine color gamut conversion parameters according to the compensation color data and the above-mentioned second color data, and according to the color The gamut conversion parameter converts the color gamut of the above-mentioned output image signal. It can be seen that, implementing the embodiment of the present application, the electronic device can determine the corresponding Color gamut conversion parameters, and then according to the color gamut conversion parameters, the color gamut of the output image signal can be stretched and transformed as much as possible to the color gamut range supported by the screen itself, so that the color brightness and saturation of the output display image can be effectively improved It helps to add more image color details, not only can make full use of the full display performance of the screen of the electronic device, but also greatly improves the color effect of the output display image of the electronic device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic diagram of an application scenario of a color enhancement method disclosed in an embodiment of the present application;

Fig. 2 is a schematic flow chart of a color enhancement method disclosed in the embodiment of the present application;

Fig. 3 is a schematic diagram of a color gamut range of the screen disclosed in the embodiment of the present application;

FIG. 4 is a schematic diagram of a color gamut range of an output image signal disclosed in an embodiment of the present application;

Fig. 5 is a schematic flowchart of another color enhancement method disclosed in the embodiment of the present application;

Fig. 6 is a schematic flowchart of another color enhancement method disclosed in the embodiment of the present application;

Fig. 7 is a modular schematic diagram of a color enhancement device disclosed in an embodiment of the present application;

Fig. 8 is a schematic modular diagram of an electronic device disclosed in an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or process that includes a series of steps or units. The apparatus is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to the process, method, product or apparatus.

The embodiment of the present application discloses a color enhancement method and device, an electronic device, and a storage medium, which can effectively utilize the display performance of the screen of the electronic device and improve the color effect of the output display image of the electronic device.

A detailed description will be given below in conjunction with the accompanying drawings.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of an application scenario of a color enhancement method disclosed in an embodiment of the present application. As shown in FIG. 1 , the electronic device 100 may include a screen 101, and the screen 101 may be used to output a corresponding display image according to an output image signal. Wherein, the above-mentioned output image signal may be an image signal corresponding to an image to be output by the screen 101, and the output image signal may be generated by the electronic device 100 itself (for example, based on locally stored image data, video data, etc.); Obtained from the network device through the network connection established between the electronic device 100 and a network device (such as a network resource server, etc.); it may also be a communication connection (such as Bluetooth) established directly with other electronic devices through the electronic device 100. connection, Wi-Fi connection, etc.), received from other electronic devices.

Exemplarily, the screen 101 of the electronic device 100 may include a backlight layer and a display layer not shown in the figure. The backlight layer may be used to emit a white backlight, and the display layer may be used to adjust the filters of different pixels according to the above-mentioned output image signal. The color of the light and the degree of filtering are used to filter the above-mentioned white backlight to achieve color output of different colors and different brightnesses. Taking a liquid crystal TV as an example, it may have a liquid crystal display (Liquid Crystal Display, LCD), and the display layer may specifically be a combination of a TFT (Thin Film Transistor, thin film transistor) layer, a liquid crystal layer, and a filter layer. By controlling the voltage signal on the TFT layer through the built-in processor of the LCD TV, the arrangement state of the liquid crystal molecules in the liquid crystal layer can be adjusted accurately, so as to distribute the corresponding light transmission for different pixels and filters of different colors in the filter layer. In this way, the brightness of each pixel on different color channels can be adjusted, and the color effect corresponding to the output image signal can be displayed on the screen 101, so as to realize the corresponding display image output.

Optionally, the screen 101 of the above-mentioned electronic device 100 may also only include a display layer, and the display layer may emit light by itself, so as to directly adjust the color effect displayed on the screen 101 under the control of the built-in processor of the electronic device 100, To achieve the corresponding display image output. Exemplarily, taking an OLED (Organic Light Emitting Diodes, Organic Light Emitting Diodes) TV as an example, it may have an OLED display screen, and the above-mentioned display layer may specifically be an OLED layer.

It should be noted that the above-mentioned output image signal and the screen 101 of the electronic device 100 itself may have their own color gamuts (or called color spaces, color spaces, etc.), that is, color ranges that can be represented by each. Generally speaking, the color gamut ranges of the above two can be different. If the color gamut range of the output image signal is narrower than the color gamut range supported by the screen 101, then the screen 101 can fully express the image color details (such as color brightness, saturation, etc.) More image color details are added within the color gamut of the screen 101 . On the contrary, if the color gamut supported by the screen 101 is narrower than the color gamut of the output image signal, the screen 101 can only partially express the above-mentioned color details of the image. No matter which of the above situations where the color gamut does not match, the electronic device 100 can adaptively adjust the color gamut of the output image signal to make full use of the display performance of its screen 101, thereby improving the electronic device 100 according to the color gamut. The output image signal after gamut adjustment shows the color effect of the image.

In the embodiment of the present application, the electronic device 100 may acquire first color data corresponding to an output image signal of its screen 101 and second color data corresponding to a color gamut of the screen 101 . Wherein, the second color data may be obtained by performing a color test on the screen 101 . On this basis, the electronic device 100 can perform compensation gain processing on the above-mentioned first color data to obtain corresponding compensation color data, and then can determine color gamut conversion parameters according to the compensation color data and the above-mentioned second color data, and according to the The color gamut conversion parameter converts the color gamut of the above-mentioned output image signal.

By implementing the above method, the electronic device 100 can comprehensively consider the color information corresponding to the output image signal of the display image output by its screen 101, and the color information corresponding to the screen itself (especially information related to the color gamut), so as to determine the Output the color gamut conversion parameter of the color gamut conversion of the image signal, and then according to the color gamut conversion parameter, the color gamut of the output image signal can be stretched and transformed as much as possible to the color gamut range that the screen 101 itself can support (the color gamut of the screen 101 The color gamut range is usually wider than the color gamut range of the output image signal), which can effectively improve the color brightness, saturation, etc. The overall display performance of 101 greatly improves the color effect of the output display image of the electronic device 100 .

Wherein, the above-mentioned electronic device 100 may include various devices or systems with screen display functions, such as mobile phones, smart wearable devices, vehicle-mounted terminals, tablet computers, PCs (Personal Computers, personal computers), PDAs (Personal Digital Assistants, personal digital assistants) ), TV, etc., which are not specifically limited in the embodiments of the present application. It can be understood that the electronic device 100 shown in FIG. 1 is a TV, which is only an example and should not be regarded as a limitation on the type of the electronic device 100 in the embodiment of the present application.

Please refer to FIG. 2 . FIG. 2 is a schematic flowchart of a color enhancement method disclosed in an embodiment of the present application. The method may be applied to the above-mentioned electronic device, and the electronic device may include a screen. As shown in Figure 2, the color enhancement method may include the following steps:

202. Acquire first color data corresponding to an output image signal of the screen, and second color data corresponding to a color gamut of the screen, where the second color data is obtained by performing a color test on the screen.

Exemplarily, the first color data corresponding to the above output image signal may include a color coding numerical range or value (Data Range/Data Level) determined by the signal source of the output image signal. Taking the color space of the above signal source as the RGB color space as an example, for three different color channels of R (Red, red), G (Green, green), and B (Blue, blue), the first color data may include Rs , Gs, and Bs respectively represent the corresponding DataLevel on each color channel, so as to jointly represent the RGB color gamut range corresponding to the output image signal. It should be noted that the values of the above-mentioned first color data Rs, Gs, and Bs may specifically be any integer value within the value range of [0, 255]. In the embodiment of the present application, the electronic device may directly determine the Data Level corresponding to its signal source according to the above output image signal, so as to obtain the first color data corresponding to the output image signal.

Exemplarily, the second color data corresponding to the color gamut of the above-mentioned screen may include color parameters obtained by performing a color test on the screen within the range of the color gamut supported by the screen, for example, displaying different target test images The measured chromaticity values x, y and luminance value lv, etc., wherein the chromaticity value x can represent the ratio of the red primary color, and the chromaticity value y can represent the ratio of the green primary color.

Specifically, by using a color analyzer (such as CA-410, etc.), various situations in which the screen outputs target test images of different colors and different brightnesses can be tested respectively. Also taking the RGB color space as an example, for the three different color channels of R, G, and B, the screen of the electronic device can sequentially display the target test images corresponding to each Data Level (usually 0-255) under each color channel , and each target test image is tested by a color analyzer to obtain the color parameters x, y, lv, etc. corresponding to each Data Level under each color channel. Optionally, it is also possible to test only the target test images corresponding to some special Data Levels, and use the color parameters obtained by the test as the second color data; or further derive other Data Levels based on the color parameters obtained by the test. For the corresponding color parameters, the color parameters obtained from the above test and derivation are collectively used as the second color data.

On this basis, the electronic device can communicate with the color analyzer to acquire the second color data obtained by the color analyzer. Optionally, the above-mentioned second color data can also be manually input into the electronic device, and stored in the storage module of the electronic device, so as to be recalled when the color gamut conversion of the output image signal is required.

In the embodiment of the present application, since the color gamut range covered by the output image signal does not usually match the color gamut range supported by the screen of the electronic device (for example, the color gamut range of the output image signal is narrower than the color gamut range supported by the screen Range), by acquiring the first color data corresponding to the above output image signal, and the second color data corresponding to the color gamut of the screen, the electronic device can comprehensively consider the difference between the two in subsequent steps, and based on the first The color data and the second color data determine the corresponding color gamut conversion parameters, which are used to perform color gamut conversion on the output image signal, so that the display performance of the screen can be fully utilized as much as possible, and the color effect of the output display image of the electronic device can be improved. .

204. Perform compensation gain processing on the first color data to obtain compensated color data.

In this embodiment of the application, if the color gamut range of the output image signal is narrower than the color gamut range supported by the screen, when it is necessary to perform color gamut conversion on the output image signal, the first Compensation and gain processing is performed on the color data to properly increase the overall value range of the first color data, so as to further improve the color gamut range of the output image signal.

In some embodiments, the electronic device may use a fixed gain value to compensate the first color data. Exemplarily, for the first color data Rs, Gs, Bs, a fixed gain value c can be specified, and the fixed gain value is added to the first color data respectively to obtain the corresponding compensated color data Rs', Gs' , Bs'. Wherein, Rs'=Rs+c, Gs'=Gs+c, Bs'=Bs+c.

In some other embodiments, the electronic device may also use a floating gain value to compensate the above-mentioned first color data. Exemplarily, for the first color data Rs, Gs, and Bs of different numerical ranges, that is, different numerical ranges subdivided within the range [0,255] (such as [0,60), [60,231), [231,255], etc. ), you can specify different gain values to perform targeted compensation based on the user's different visual sensitivities to different color intervals (for example, relatively sensitive to bright field images, relatively insensitive to dark field images, etc.).

206. Determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter.

In the embodiment of the present application, after the electronic device acquires the compensation color data and the second color data, it can comprehensively consider the color gamut range difference between the color gamut corresponding to the output image signal and the color gamut corresponding to the screen itself, to Determine the corresponding color gamut conversion parameters. Exemplarily, the above-mentioned color gamut conversion parameters may include different forms such as color gamut gain coefficient and color gamut conversion matrix, and the electronic device may convert the color gamut of the output image signal of its screen according to different forms of color gamut conversion parameters, and then A display image with richer color details can be output based on the output image signal.

For example, please refer to Figure 3 and Figure 4 together, Figure 3 is a schematic diagram of a color gamut range of the screen disclosed in the embodiment of the application, and Figure 4 is a color of the output image signal disclosed in the embodiment of the application Schematic diagram of the domain scope. As shown in Figure 3 and Figure 4, the color gamut range of the screen of the electronic device (that is, the A area in the color gamut horseshoe diagram shown in Figure 3) can be compared with the color gamut range of the output image signal (that is, the color gamut horseshoe shown in Figure 4 Area B in the figure) is wider, so when the electronic device performs the above-mentioned conversion on the color gamut of the output image signal, it actually stretches the color gamut of the output image signal to the color gamut that the screen itself can support. Transform (stretched from the range corresponding to the B area to the range corresponding to the A area), so that the output image signal can match the color gamut of the screen, so that the display image output by the screen according to the output image signal can have higher brightness, Saturation, etc., the visual effect is more vivid, which helps to improve the user's visual experience when watching the output display image.

It can be seen that, by implementing the color enhancement method described in the above embodiments, the electronic device can determine the corresponding color gamut conversion parameters by combining the color information corresponding to the output image signal used to output the display image on its screen and the color information corresponding to the screen itself. , and then according to the color gamut conversion parameter, the color gamut of the output image signal can be stretched and transformed as much as possible to the color gamut range supported by the screen itself, so that the color brightness and saturation of the output display image can be effectively improved, and there is It helps to add more image color details, not only can make full use of all the display performance of the screen of the electronic device, but also greatly improves the color effect of the output display image of the electronic device, and improves the user's visual experience when viewing the output display image.

Please refer to FIG. 5 . FIG. 5 is a schematic flowchart of another color enhancement method disclosed in an embodiment of the present application. The method may be applied to the above-mentioned electronic device, and the electronic device may include a screen. As shown in Figure 5, the color enhancement method may include the following steps:

502. Acquire first color data corresponding to an output image signal of the screen, and second color data corresponding to a color gamut of the screen, where the second color data is obtained by performing a color test on the screen.

Wherein, step 502 is similar to the above-mentioned step 202 and will not be repeated here.

504. Perform normalization on the first color data according to the first value range corresponding to the first color data, to obtain normalized color data matching the first color data.

In the embodiment of this application, by normalizing the first color data, the value range of the first color data can be compressed from the original [0,255] to [0,1], thereby reducing the complexity of subsequent calculations to improve computational efficiency. Optionally, by normalizing the first color data in different numerical ranges with different step lengths, the normalized color data corresponding to different color ranges can be adapted based on the user's different visual sensitivities to different color ranges. sex scaling. Wherein, the above-mentioned step length may represent a value interval of normalized color data obtained during the process of normalizing the first color data. It can be understood that the first color data in different numerical ranges may correspond to different step values (that is, the value of the above step), and the corresponding normalized color data may correspond to different value intervals. Exemplarily, if the step size n=0.1, it can indicate that the value of the normalized color data is incremented or decremented at an interval of 0.1 (such as when Rs'∈[0,0.5], Rs'=0,0.1,0.2 ,...,0.5); if the step size n=0.05, it can indicate that the value of the normalized color data increases or decreases with an interval of 0.05 (such as when Rs'∈[0.7,1], Rs'=0.7, 0.75,0.8,...,1). On this basis, the electronic device can determine more accurate color gamut conversion parameters in subsequent steps, so as to ensure that the output display image can obtain a suitable visual effect (for example, not losing some bright field details sensitive to the human eye), and The complexity of subsequent calculations can be reduced as much as possible (for example, some dark field details that are not sensitive to human eyes are ignored).

Specifically, for example, the electronic device may first determine a step size matching the first numerical range according to the first numerical range corresponding to the first color data. Taking the first color data as Rs as an example, when Rs∈[0,60), since the human eye is not sensitive to dark field details, the step value n=0 can be taken, and the corresponding normalized color data Rs' can be It is always 0; when Rs∈[60,231), you can take the step size n∈[0.0039,0.039], then the corresponding normalized color data Rs' can satisfy 0.2352≤Rs'<0.9059; when Rs∈[231,255] , then a fixed step value n=0.0039 can be taken. At this time, the corresponding normalized color data Rs' can satisfy 0.9059≤Rs'≤1, so that the first color data can be normalized in equal proportions, avoiding Bright field details to which the human eye is sensitive are disturbed.

Further, the electronic device may determine the normalized color data matching the first color data within the second value range according to the above step value. Wherein, the above-mentioned second numerical range can be obtained by mapping the first numerical range, for example, the different value ranges of the first color data Rs within [0, 255] can be correspondingly mapped to obtain the normalized color data Rs' in [0 ,1], so that the normalized color data matching the first color data can be accurately determined. Still taking the first color data as Rs as an example, when Rs∈[0,60), it can be mapped to obtain the corresponding 0≤Rs'<0.2352 (the above-mentioned Rs' is always 0 and also conforms to this value range); when Rs∈ When [231,255], it can be mapped to get the corresponding 0.9059≤Rs'≤1, and within this range Rs' can take a value according to the fixed step size n=0.0039; when Rs∈[60,231), it can be mapped to get the corresponding 0.2352≤Rs '<0.9059, within this range Rs' can take values according to different selected step lengths n (where n∈[0.0039,0.039]).

Exemplarily, the above-mentioned value range same as Rs can be used for the first color data Gs and Bs, and the corresponding normalized color data Gs' and Bs' can also use the same value range as above-mentioned Rs'.

506. Perform compensation gain processing on the normalized color data by using a compensation gain function corresponding to the first value range to obtain compensation color data.

In the embodiment of the present application, after the electronic device acquires the normalized color data matching the first color data, it may perform compensation gain processing based on the normalized color data. Exemplarily, for normalized color data in different numerical ranges, the electronic device can perform gain compensation in different ways or in different degrees, so that based on users' different visual sensitivities to different color ranges, the normalized color data can be improved. Flexibility and efficiency for compensation gain processing. It can be understood that since the second numerical range for dividing the normalized color data can be obtained by mapping the first numerical range for dividing the first color data, the electronic device can directly determine the corresponding compensation gain function according to the first numerical range, and then Compensation gain processing can be performed on the normalized color data through the compensation gain function to obtain the compensation color data.

In some embodiments, the above-mentioned compensation gain function may also be related to a step value matched to the first numerical range. Exemplarily, after the electronic device determines the step value matching the first numerical range according to the first numerical range corresponding to the first color data, it may further determine the step size corresponding to the first numerical range according to the step value. The corresponding compensation gain function.

Specifically, for example, when Rs∈[0,60), since human eyes are not sensitive to dark field details, compensation gain processing may not be performed on the corresponding normalized color data Rs′, that is, the corresponding compensation color data Ra=Rs '.

When Rs∈[60,231), the corresponding step size n∈[0.0039,0.039], the function Ra=Rs'+n can be used to calculate the corresponding compensation color data, and the step size n can be in the range of [0.0039, 0.039], which helps to improve the flexibility of compensation gain processing for normalized color data. Exemplarily, n=0.0039N (N is a positive integer, N∈[1,10]) can be taken, that is, Ra=Rs'+0.0039N, at this time, the compensation gain for the normalized color data Rs' can be The minimum value of the long value n is an integer multiple of 0.0039, which is equivalent to the Data Level of the compensation integer multiple. On the premise of ensuring the flexibility of compensation gain processing, it also reduces the complexity of subsequent calculations and helps to improve calculation efficiency.

When Rs∈[231,255], the corresponding step value n=0.0039, at this time, Ra=Rs'+n=Rs'+0.0039 can be used to calculate the corresponding compensation color data, that is, gain compensation of only 1 step , which can effectively prevent the output display image from losing some bright field details.

Optionally, the electronic device may also determine the compensation color data corresponding to the normalized color data by means of table lookup. Exemplarily, after the electronic device obtains the normalized color data matching the first color data, it can obtain its pre-stored gain compensation comparison table, and in the gain compensation comparison table, query The corresponding compensation color data can then be applied to the subsequent calculation process for determining the color gamut conversion parameters.

508. Determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter.

Wherein, step 508 is similar to the above-mentioned step 206 and will not be repeated here.

It can be seen that, by implementing the color enhancement method described in the above embodiments, the electronic device can combine the color information corresponding to the output image signal used to output the display image on its screen, and the color information corresponding to the screen itself, to maximize the color gamut of the output image signal. It is possible to stretch and transform to the color gamut range supported by the screen itself, so as to effectively improve the color brightness and saturation of the output display image, help to add more image color details, and make more comprehensive use of electronic equipment The full display performance of the screen greatly improves the color effect of the output display image of the electronic device, and improves the user's visual experience when viewing the output display image; in addition, by setting different numerical ranges for calculation, it can be based on the user's perception of different colors. The different visual sensitivities in the range improve the flexibility and efficiency of the calculation process, and improve the efficiency of electronic equipment for color gamut conversion of output image signals.

Please refer to FIG. 6 . FIG. 6 is a schematic flowchart of another color enhancement method disclosed in an embodiment of the present application. The method may be applied to the above-mentioned electronic device, and the electronic device may include a screen. As shown in Figure 6, the color enhancement method may include the following steps:

602. Acquire first color data corresponding to an output image signal of the screen, and second color data corresponding to a color gamut of the screen, where the second color data is obtained by performing a color test on the screen.

Wherein, step 602 is similar to the above-mentioned step 202 and will not be repeated here.

604. According to the first numerical range corresponding to the first color data, determine a step size matching the first numerical range.

606. Determine normalized color data that matches the first color data within a second value range according to the above step value, where the second value range is mapped from the first value range.

Wherein, step 604 and step 606 are similar to the above step 504 and will not be repeated here.

608. Determine a compensation gain function corresponding to the first value range according to the above step value.

610. Perform compensation gain processing on the normalized color data by using a compensation gain function corresponding to the first value range to obtain compensation color data.

Wherein, step 608 and step 610 are similar to the above step 506 and will not be repeated here.

612. The second color data includes the chromaticity value and the luminance value obtained by performing a color test on the screen outputting the target test image, and calculate the absolute luminance stimulus value corresponding to the screen according to the chromaticity value and the luminance value.

Wherein, the above-mentioned target test image may include part of the target test image corresponding to the special Data Level, that is, the color analyzer may only test the part of the target test image for the screen output of the electronic device, and according to the obtained color parameter ( Including chromaticity values x, y and luminance value lv, etc.), the subsequent step of calculating color gamut conversion parameters is performed.

Exemplarily, taking the color gamut of the screen represented by the RGB color space as an example, for the three different color channels of R, G, and B, the above-mentioned target test image may include the screen output when Data Level=255 for each color channel image, and the image output on the screen when Data Level=61. Among them, when Data Level = 255, its corresponding target test image is the image with the highest color brightness required for testing, so that the color performance capability of the screen can be tested in bright field conditions; when Data Level = 61, its corresponding target image The target test image is the image with the lowest color brightness required for testing (ignoring the insensitive Data Level range [0,60] of the human eye), so that the color performance capability of the screen in dark field conditions can be tested.

Specifically, the electronic device may respectively calculate the first stimulus value and the second stimulus value corresponding to the screen according to the above-mentioned chromaticity values x, y and brightness value lv. Wherein, the above-mentioned first stimulus value may include the color stimulus value when the target test image corresponds to a bright field, and the second stimulus value may include the color stimulus value when the target test image corresponds to a dark field. It should be noted that the brightness of the target test image corresponding to the bright field situation is higher than the brightness corresponding to the dark field situation. It can be understood that if the color gamut of the above-mentioned screen is converted into an XYZ color space (that is, a color space expressed based on tricolor stimulus values measured based on human color vision), the above-mentioned first stimulus value and second stimulus value It can include the respective color stimulus values under the three channels of X, Y, and Z respectively, that is, the first stimulus value can include Xw, Yw, Zw in the case of bright field, and the second stimulus value can include Xk, Yk in the case of dark field , Zk.

On this basis, based on the constraint relationship between the above-mentioned chromaticity values x, y, brightness value lv and each color stimulus value X, Y, Z, the above-mentioned first stimulus value and second stimulus value can be calculated respectively. Exemplarily, the above constraint relationship may at least include formula 1 and formula 2 below.

Formula 1:

x=X/(X+Y+Z)

Formula 2:

y=Y/(X+Y+Z)

Wherein, X, Y, and Z in the foregoing formula 1 and formula 2 may correspond to Xw, Yw, and Zw in the case of bright field, or correspond to Xk, Yk, and Zk in the case of dark field. Optionally, for some special color temperatures, for example, when the color temperature of the screen is set to 12000K, the chromaticity values x and y at this time can be determined directly by looking up the table, thereby saving part of the measurement steps and speeding up the subsequent calculation of the first stimulus value and the second stimulus value. Stimulus value efficiency.

Further, after the electronic device calculates the first stimulus value and the second stimulus value, it can also calculate the absolute brightness stimulus value corresponding to the screen according to the first stimulus value and the second stimulus value, and calculate the absolute brightness stimulus value Applied in the subsequent step of calculating the color gamut conversion parameters. It can be understood that, similar to the first stimulus value and the second stimulus value, the above-mentioned absolute brightness stimulus value may also include respective color stimulus values Xa, Ya, Za under the three channels of X, Y, and Z. Exemplarily, the simplified formula used to calculate the absolute luminance stimulus value may be as shown in Formula 3 below.

Formula 3:

Xa=(Xw-Xk)*(Xw/Yw);

Ya=Yw-Yk;

Za=(Zw-Zk)*(Zw/Yw)

Using the above formula 3, according to the color stimulus values Xw, Yw, Zw in the bright field and the color stimulus values Xk, Yk, Zk in the dark field, the respective values of the X, Y, and Z channels can be quickly calculated. Absolute luminance stimulus values Xa, Ya, Za further improve calculation efficiency.

614. Calculate a color gamut conversion parameter according to the compensation color data and the absolute luminance stimulus value.

In the embodiment of the present application, after the electronic device calculates the compensation color data and the absolute luminance stimulus value, it may further calculate a color gamut conversion parameter for performing color gamut conversion on the output image signal. Exemplarily, the color gamut conversion parameter may include different forms such as a color gamut gain coefficient and a color gamut conversion matrix.

In some embodiments, the above-mentioned color gamut conversion parameters may include a color gamut conversion matrix, and the electronic device may first obtain the output image signal of the screen when determining the corresponding color gamut conversion matrix according to the above-mentioned compensated color data and the absolute brightness stimulus value The corresponding color standard, and then solve the target color gamut matrix corresponding to the color standard, so as to obtain the corresponding and definite color gamut conversion matrix. Exemplarily, the foregoing color standards may include Rec.709, DCI-P3, BT.2020, etc., which are not specifically limited in this embodiment of the present application.

Specifically, the electronic device can substitute the above-mentioned compensated color data and the absolute brightness stimulus value into the target color gamut matrix corresponding to the acquired color standard as the constraint relationship of each element in the target color gamut matrix, so that the The target color gamut matrix is solved to obtain the corresponding color gamut conversion matrix. For example, the target conversion matrix (color gamut conversion matrix) may include a 3×3 matrix, as shown in matrix M below.

Matrix M:

Wherein, each element s1 to s9 of the above-mentioned matrix M can be solved through a certain constraint relationship, and the constraint relationship can be related to the above-mentioned compensated color data and the absolute brightness stimulus value. In an embodiment, the constraint relationship may be shown in Formula 4 below.

Formula 4:

Xa=s1*Ra+s2*Ga+s3*Ba;

Ya=s4*Ra+s5*Ga+s6*Ba;

Za=s7*Ra+s8*Ga+s9*Ba

On this basis, the above-mentioned matrix M can be solved by substituting the above-mentioned compensated color data Ra, Ga, Ba and absolute brightness stimulation values Xa, Ya, Za into formula 4. Further, the electronic device can convert the color gamut of the output image signal of its screen according to the solved color gamut conversion matrix, so that the color gamut of the output image signal can be as close as possible to the color gamut range supported by the screen itself Stretching transformation is performed so that the output image signal can match the color gamut of the screen, so that the display image output by the screen according to the output image signal can have higher brightness, saturation, etc., and the visual effect is more vivid, which helps It is used to improve the user's visual experience when watching the output display image.

It can be seen that, by implementing the color enhancement method described in the above embodiments, the electronic device can combine the color information corresponding to the output image signal used to output the display image on its screen, and the color information corresponding to the screen itself, to maximize the color gamut of the output image signal. It is possible to stretch and transform to the color gamut range supported by the screen itself, so as to effectively improve the color brightness and saturation of the output display image, help to add more image color details, and make more comprehensive use of electronic equipment The full display performance of the screen greatly improves the color effect of the output display image of the electronic device, and improves the user's visual experience when viewing the output display image; in addition, the color gamut conversion matrix is determined through the above calculation method, which can ensure a certain calculation accuracy Under the premise of reducing the amount of calculation as much as possible and improving the calculation efficiency, it is beneficial to improve the efficiency of the color gamut conversion of the output image signal by the electronic device.

Please refer to FIG. 7 . FIG. 7 is a schematic modular diagram of a color enhancement device disclosed in an embodiment of the present application. The color enhancement device may be applied to the above-mentioned electronic device, and the electronic device may include a screen. As shown in FIG. 7, the color enhancement device may include an acquisition unit 701, a compensation unit 702, and a color gamut conversion unit 703, wherein:

An acquisition unit 701, configured to acquire first color data corresponding to the output image signal of the screen, and second color data corresponding to the color gamut of the screen, where the second color data is obtained by performing a color test on the screen;

A compensation unit 702, configured to perform compensation gain processing on the first color data to obtain compensated color data;

The color gamut conversion unit 703 is configured to determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter.

It can be seen that by using the color enhancement device described in the above embodiments, the electronic device can combine the color information corresponding to the output image signal used to output the display image on its screen and the color information corresponding to the screen itself to determine the corresponding color gamut conversion parameters. , and then according to the color gamut conversion parameter, the color gamut of the output image signal can be stretched and transformed as much as possible to the color gamut range supported by the screen itself, so that the color brightness and saturation of the output display image can be effectively improved, and there is It helps to add more image color details, not only can make full use of all the display performance of the screen of the electronic device, but also greatly improves the color effect of the output display image of the electronic device, and improves the user's visual experience when viewing the output display image.

In an embodiment, the compensation unit 702 may include a first calculation subunit and a second calculation subunit not shown, wherein:

The first calculation subunit is configured to normalize the first color data according to the first numerical range corresponding to the first color data, to obtain normalized color data matching the first color data;

The second calculation subunit is configured to perform compensation gain processing on the normalized color data through the compensation gain function corresponding to the first value range to obtain the compensation color data.

Wherein, the above-mentioned first calculation subunit can specifically be used to determine a step value matching the first numerical range according to the first numerical range corresponding to the above-mentioned first color data; according to the step value, in the second numerical range Determine the normalized color data matching the first color data, wherein the second numerical range can be obtained by mapping the first numerical range.

In one embodiment, the compensation unit 702 may include a determination subunit not shown, wherein the determination subunit may be used to return the compensation gain function corresponding to the first numerical range to The compensation gain processing is performed on the normalized color data, and before the compensation color data is obtained, the compensation gain function corresponding to the above-mentioned first value range is determined according to the above-mentioned step size value.

It can be seen that by using the color enhancement device described in the above embodiments, the electronic device can combine the color information corresponding to the output image signal used to output the display image on its screen, and the color information corresponding to the screen itself, to maximize the color gamut of the output image signal. It is possible to stretch and transform to the color gamut range supported by the screen itself, so as to effectively improve the color brightness and saturation of the output display image, help to add more image color details, and make more comprehensive use of electronic equipment The full display performance of the screen greatly improves the color effect of the output display image of the electronic device, and improves the user's visual experience when viewing the output display image; in addition, by setting different numerical ranges for calculation, it can be based on the user's perception of different colors. The different visual sensitivities in the range improve the flexibility and efficiency of the calculation process, and improve the efficiency of electronic equipment for color gamut conversion of output image signals.

In one embodiment, the above-mentioned second color data may include chromaticity values and brightness values obtained by performing a color test on the screen outputting the target test image, and the above-mentioned color gamut conversion unit 703 may include a third calculation subunit not shown in the figure and a fourth computing subunit, wherein:

The third calculation subunit is used to calculate the absolute luminance stimulus value corresponding to the screen according to the chromaticity value and the luminance value;

The fourth calculation subunit is used to calculate the color gamut conversion parameters according to the compensation color data and the absolute brightness stimulation value.

Wherein, the above-mentioned third calculation subunit can specifically be used to respectively calculate the first stimulus value and the second stimulus value corresponding to the screen according to the above-mentioned chromaticity value and brightness value, wherein the first stimulus value can include the above-mentioned target test image Corresponding to the color stimulus value in the bright field situation, the second stimulus value may include the color stimulus value in the dark field situation corresponding to the target test image; according to the first stimulus value and the second stimulus value, calculate the corresponding absolute brightness of the screen stimulus value.

In an embodiment, the above-mentioned color gamut conversion parameters may include a color gamut conversion matrix, and the above-mentioned fourth calculation subunit may specifically be used to obtain the color standard corresponding to the output image signal of the screen, and convert the above-mentioned compensated color data and absolute The luminance stimulus value is substituted into the target color gamut matrix corresponding to the color standard to solve the target color gamut matrix to obtain the corresponding color gamut conversion matrix;

The color gamut conversion unit 703 may further include a conversion subunit not shown in the figure, and the conversion subunit may be configured to convert the color gamut of the output image signal according to the above color gamut conversion matrix.

It can be seen that by using the color enhancement device described in the above embodiments, the electronic device can combine the color information corresponding to the output image signal used to output the display image on its screen, and the color information corresponding to the screen itself, to maximize the color gamut of the output image signal. It is possible to stretch and transform to the color gamut range supported by the screen itself, so as to effectively improve the color brightness and saturation of the output display image, help to add more image color details, and make more comprehensive use of electronic equipment The full display performance of the screen greatly improves the color effect of the output display image of the electronic device, and improves the user's visual experience when viewing the output display image; in addition, the color gamut conversion matrix is determined through the above calculation method, which can ensure a certain calculation accuracy Under the premise of reducing the amount of calculation as much as possible and improving the calculation efficiency, it is beneficial to improve the efficiency of the color gamut conversion of the output image signal by the electronic device.

Please refer to FIG. 8 . FIG. 8 is a schematic modular diagram of an electronic device disclosed in an embodiment of the present application. As shown in Figure 8, the electronic equipment may include:

A memory 801 storing executable program codes;

a processor 802 coupled to the memory 801;

Wherein, the processor 802 invokes the executable program code stored in the memory 801 to execute all or part of the steps in any color enhancement method described in the above-mentioned embodiments.

In addition, the embodiment of the present application further discloses a computer-readable storage medium, which stores a computer program for electronic data exchange, wherein the computer program enables the computer to execute any color enhancement method described in the above-mentioned embodiments. all or part of the steps.

In addition, the embodiments of the present application further disclose a computer program product. When the computer program product is run on a computer, the computer can execute all or part of the steps in any color enhancement method described in the above embodiments.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium includes read-only Memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), programmable read-only memory (Programmable Read-only Memory, PROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), One-time Programmable Read-Only Memory (OTPROM), Electronically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory -Only Memory, CD-ROM) or other optical disk storage, magnetic disk storage, tape storage, or any other computer-readable medium that can be used to carry or store data.

A color enhancement method and device, electronic equipment, and storage medium disclosed in the embodiments of the present application have been described above in detail. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used To help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation and application scope. In summary, this specification The content should not be construed as a limitation of the application.

Claims (10)

1. A method for color enhancement, characterized in that it is applied to an electronic device, the electronic device includes a screen, and the method comprises: Acquiring first color data corresponding to the output image signal of the screen, and second color data corresponding to the color gamut of the screen, the second color data is obtained by performing a color test on the screen; performing compensation gain processing on the first color data to obtain compensated color data; Determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter. 2. The method according to claim 1, wherein said performing compensation gain processing on said first color data to obtain compensated color data comprises: Normalizing the first color data according to the first numerical range corresponding to the first color data, to obtain normalized color data matching the first color data; Compensation gain processing is performed on the normalized color data through a compensation gain function corresponding to the first value range to obtain compensation color data. 3. The method according to claim 2, characterized in that, according to the first numerical range corresponding to the first color data, the first color data is normalized to obtain a value corresponding to the first color data. Normalized color data for data matching, including: Determine a step size matching the first numerical range according to the first numerical range corresponding to the first color data; According to the step value, normalized color data matching the first color data is determined within a second numerical range, wherein the second numerical range is mapped from the first numerical range. 4. The method according to claim 3, wherein, before performing compensation gain processing on the normalized color data through the compensation gain function corresponding to the first value range to obtain the compensation color data, the The method also includes: According to the step value, a compensation gain function corresponding to the first numerical range is determined. 5. The method according to any one of claims 1 to 4, wherein the second color data includes a chromaticity value and a brightness value obtained by performing a color test on the screen that outputs the target test image, and the Determine color gamut conversion parameters according to the compensated color data and the second color data, including: calculating an absolute luminance stimulus value corresponding to the screen according to the chromaticity value and the luminance value; A color gamut conversion parameter is calculated according to the compensated color data and the absolute luminance stimulus value. 6. The method according to claim 5, wherein the calculation of the corresponding absolute brightness stimulus value of the screen according to the chromaticity value and the brightness value comprises: According to the chromaticity value and the brightness value, respectively calculate the first stimulus value and the second stimulus value corresponding to the screen, wherein the first stimulus value includes the color of the target test image corresponding to the bright field Stimulus value, the second stimulus value includes the color stimulus value corresponding to the dark field situation of the target test image; According to the first stimulus value and the second stimulus value, an absolute brightness stimulus value corresponding to the screen is calculated. 7. The method according to claim 5, wherein the color gamut conversion parameters include a color gamut conversion matrix, and the calculation of the color gamut conversion parameters according to the compensated color data and the absolute brightness stimulus value includes : Acquiring the color standard corresponding to the output image signal of the screen; Substituting the compensated color data and the absolute brightness stimulus value into the target color gamut matrix corresponding to the color standard, solving the target color gamut matrix, and obtaining the color gamut conversion matrix; The converting the color gamut of the output image signal according to the color gamut conversion parameters includes: The color gamut of the output image signal is converted according to the color gamut conversion matrix. 8. A color enhancement device, characterized in that it is applied to electronic equipment, the electronic equipment includes a screen, and the color enhancement device includes: An acquisition unit, configured to acquire first color data corresponding to the output image signal of the screen, and second color data corresponding to the color gamut of the screen, where the second color data is obtained by performing a color test on the screen of; a compensation unit, configured to perform compensation gain processing on the first color data to obtain compensated color data; A color gamut conversion unit, configured to determine a color gamut conversion parameter according to the compensated color data and the second color data, and convert the color gamut of the output image signal according to the color gamut conversion parameter. 9. An electronic device, characterized in that it comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor is implemented as claimed in claims 1 to 7. any one of the methods described. 10. A computer-readable storage medium, on which a computer program is stored, wherein, when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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