CN118524299A - Color temperature compensation method, device, terminal equipment and storage medium - Google Patents

Abstract

The present disclosure relates to a color temperature compensation method, device, terminal device and storage medium. The color temperature compensation method is applied to a terminal device including at least two monochrome flashlights of different colors, and includes: determining the color temperature adjustment range provided by at least two flashlights in the terminal device under the current shooting environment based on the ambient light color temperature of the current shooting environment of the terminal device; obtaining the target color temperature of the terminal device; if the target color temperature is within the color temperature adjustment range, determining at least one target flashlight from the at least two flashlights; using the at least one target flashlight, performing color temperature compensation on the current shooting environment; wherein the ambient light color temperature after compensation based on the at least one target flashlight is the same as the target color temperature.

Description

Color temperature compensation method, device, terminal equipment and storage medium

Technical Field

The present disclosure relates to the field of terminal technology, and in particular to a color temperature compensation method, device, terminal equipment and storage medium.

Background Art

In order to achieve better photography effects, terminal devices usually preset multiple white balance modes or allow users to manually adjust white balance parameters. When the ambient light color temperature of the shooting environment of the terminal device is different from the color temperature preset in the white balance mode or the color temperature set by the user, the terminal device needs to compensate for the ambient light color temperature to obtain the required color temperature, thereby meeting the user's photography needs.

In the related art, color temperature compensation parameters are usually determined based on the analysis results of the collected image colors; or the color temperature compensation of the ambient light color temperature of the shooting environment is achieved by adjusting the brightness of the monochromatic flash; however, the above method is prone to large color temperature calculation errors and a small color temperature compensation range, resulting in poor color temperature compensation effects and difficulty in meeting user needs.

Summary of the invention

In order to overcome the problems existing in the related art, the present disclosure provides a color temperature compensation method, an apparatus, a terminal device and a storage medium.

According to a first aspect of an embodiment of the present disclosure, a color temperature compensation method is provided, which is applied to a terminal device including at least two monochrome flash lamps of different colors, comprising:

Based on the color temperature of the ambient light in the current shooting environment of the terminal device, determining a color temperature adjustment range provided by at least two flashlights in the terminal device in the current shooting environment;

Obtaining a target color temperature of the terminal device;

If the target color temperature is within the color temperature adjustment range, determining at least one target flash light from the at least two flash lights;

The at least one target flash is used to perform color temperature compensation on the current shooting environment; wherein the color temperature of the ambient light after compensation based on the at least one target flash is the same as the target color temperature.

Optionally, determining the color temperature adjustment range provided by at least two flashlights in the terminal device under the current shooting environment based on the color temperature of the ambient light in the current shooting environment of the terminal device includes:

Get the ambient light color temperature of the current shooting environment of the terminal device;

Detecting the compensated color temperature of each of the at least two flashes when performing color temperature compensation for the current shooting environment at the maximum working brightness;

Based on the obtained compensated color temperatures of at least two of the flashes and the color temperature of the ambient light, the color temperature adjustment range that can be provided by the terminal device under the current shooting environment is determined.

Optionally, determining the color temperature adjustment range that can be provided by the terminal device under the current shooting environment based on the obtained compensated color temperatures of at least two flashes and the ambient light color temperature includes:

Based on the compensated color temperatures of the at least two flashlights and the color temperature of the ambient light, respectively determining a first coordinate point corresponding to the at least two compensated color temperatures and a second coordinate point corresponding to the color temperature of the ambient light in a preset color coordinate system;

The second coordinate point and any adjacent two of the at least two first coordinate points enclose at least one color temperature adjustment sub-region; any two color temperature adjustment sub-regions in the at least one color temperature adjustment sub-region do not overlap each other;

Based on the color temperature range corresponding to at least one color temperature adjustment sub-area, the color temperature adjustment range that can be provided by the terminal device under the current shooting environment is determined.

Optionally, if the target color temperature is within the color temperature adjustment range, determining at least one target flash light from the at least two flash lights comprises:

Determine a target coordinate point corresponding to the target color temperature in a preset color coordinate system;

Determining a positional relationship between the target coordinate point and at least one of the color temperature adjustment sub-regions;

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region, two flashes corresponding to the color temperature adjustment sub-region where the target coordinate point is located are determined as the target flashes.

Optionally, using the at least one target flash to perform color temperature compensation on the current shooting environment includes:

respectively determining the distances between the target coordinate point and two first coordinate points corresponding to the color temperature adjustment sub-region where the target coordinate point is located;

Determining color compensation parameters of the two target flash lights based on a ratio between the distances corresponding to the two first coordinate points;

Based on the color compensation parameters, respectively determining the target working brightness of the two target flash lamps;

The color temperature of the current shooting environment is compensated by using the two target flash lamps at the target working brightness.

Optionally, if the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region, determining two flashes corresponding to the color temperature adjustment sub-region where the target coordinate point is located as the target flashes includes:

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-area, determining whether the target coordinate point is located on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-area and the second coordinate point;

If the target coordinate point is not on the connecting line, the two flashes corresponding to the color temperature adjustment sub-area are determined as the target flashes.

Optionally, the method comprises:

If the target coordinate point is on the connection line, the flash corresponding to the first coordinate point forming the connection line is determined as the target flash.

According to a second aspect of an embodiment of the present disclosure, an embodiment of the present application provides a color temperature compensation device, which is provided in a terminal device including at least two monochrome flash lamps of different colors, and includes:

A first determination module, configured to determine, based on the color temperature of ambient light in the current shooting environment of the terminal device, a color temperature adjustment range provided by at least two flashlights in the terminal device in the current shooting environment;

An acquisition module, used to acquire a target color temperature of the terminal device;

A second determination module, configured to determine at least one target flash light from the at least two flash lights if the target color temperature is within the color temperature adjustment range;

A compensation module is used to use the at least one target flash to perform color temperature compensation on the current shooting environment; wherein the color temperature of the ambient light after compensation based on the at least one target flash is the same as the target color temperature.

Optionally, the first determining module is further used to obtain the color temperature of ambient light in the current shooting environment of the terminal device;

Detecting the compensated color temperature of each of the at least two flashes when performing color temperature compensation for the current shooting environment at the maximum working brightness;

Based on the obtained compensated color temperatures of at least two of the flashes and the color temperature of the ambient light, the color temperature adjustment range that can be provided by the terminal device under the current shooting environment is determined.

Optionally, the first determination module is further used to determine, in a preset color coordinate system, first coordinate points corresponding to the at least two compensated color temperatures and a second coordinate point corresponding to the ambient light color temperature, respectively, based on the compensated color temperatures of the at least two flashes and the ambient light color temperature;

The second coordinate point and any adjacent two of the at least two first coordinate points enclose at least one color temperature adjustment sub-region; any two color temperature adjustment sub-regions in the at least one color temperature adjustment sub-region do not overlap each other;

Based on the color temperature range corresponding to at least one color temperature adjustment sub-area, the color temperature adjustment range that can be provided by the terminal device under the current shooting environment is determined.

Optionally, the second determination module is used to determine a target coordinate point corresponding to the target color temperature in a preset color coordinate system;

Determining a positional relationship between the target coordinate point and at least one of the color temperature adjustment sub-regions;

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region, two flashes corresponding to the color temperature adjustment sub-region where the target coordinate point is located are determined as the target flashes.

Optionally, the compensation module is further used to respectively determine the distances between the target coordinate point and two first coordinate points corresponding to the color temperature adjustment sub-region where the target coordinate point is located;

Determining color compensation parameters of the two target flash lights based on a ratio between the distances corresponding to the two first coordinate points;

Based on the color compensation parameters, respectively determining the target working brightness of the two target flash lamps;

The color temperature of the current shooting environment is compensated by using the two target flash lamps at the target working brightness.

Optionally, the second determination module is used to determine whether the target coordinate point is on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-region and the second coordinate point if the position relationship indicates that the target coordinate point is within the color temperature adjustment sub-region;

If the target coordinate point is not on the connecting line, the two flashes corresponding to the color temperature adjustment sub-area are determined as the target flashes.

Optionally, the second determination module is used to determine the flash corresponding to the first coordinate point forming the connection line as the target flash if the target coordinate point is on the connection line.

According to a third aspect of an embodiment of the present disclosure, a terminal device is provided, including:

at least two monochrome flashes of different colors;

a memory for storing processor-executable instructions;

A processor connected to the memory;

The processor is configured to execute the color temperature compensation method as described in the first aspect of the embodiment of the present disclosure.

According to the fourth aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided. When the instructions in the storage medium are executed by a processor of a terminal device, the terminal device is enabled to perform the steps in the color temperature compensation method as described in the first aspect of the embodiment of the present disclosure.

The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

Based on the ambient light color temperature of the current shooting environment of the terminal device, the disclosed embodiment can determine the color temperature adjustment range provided by at least two different colored monochromatic flashes in the terminal device under the current shooting environment; by obtaining the target color temperature of the terminal device, and when the target color temperature is within the color temperature adjustment range, that is, when the ambient light color temperature can be adjusted to the target color temperature, at least one target flash is determined from at least two flashes to perform color temperature compensation on the current shooting environment, so that the compensated ambient light color temperature is the same as the target color temperature, so as to achieve the target color temperature required for taking pictures and meet the required photographic effect. In addition, compared with the color temperature adjustment range that can be provided by a monochromatic flash, at least two different colored monochromatic flashes can provide a larger color temperature compensation range to meet more user needs.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

FIG. 1 is a flow chart of a method for adjusting white balance shown in the related art.

FIG. 2 is a flowchart diagram 1 of a color temperature compensation method according to an exemplary embodiment of the present disclosure.

FIG. 3 is a second flow chart of a color temperature compensation method according to an exemplary embodiment of the present disclosure.

Fig. 4 is a schematic diagram of a device showing a color temperature compensation method according to an exemplary embodiment of the present disclosure.

FIG. 5 is a third flow chart of a color temperature compensation method according to an exemplary embodiment of the present disclosure.

Fig. 6 is a schematic diagram showing a color temperature adjustment range of a terminal device configured with three monochrome flash lamps of different colors according to an exemplary embodiment of the present disclosure.

FIG. 7 is a schematic diagram showing color temperature in a preset color coordinate system according to an exemplary embodiment of the present disclosure.

FIG. 8 is a fourth flowchart diagram of a color temperature compensation method according to an exemplary embodiment of the present disclosure.

Fig. 9 is a schematic structural diagram of a color temperature compensation device according to an exemplary embodiment of the present disclosure.

Fig. 10 is a block diagram showing a terminal device according to an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

In the related art, the color temperature compensation of the shooting environment of the terminal device is usually achieved in the following two ways:

The first method is to perform color temperature compensation based on the image color analysis result; specifically, as shown in Figure 1, Figure 1 is a flow chart of a white balance adjustment method shown in the related art, by inputting the RGB pixel values of the pixels in the image, determining the green pixels and the gray pixels from the pixels; determining the possible light source points according to the RGB pixel values corresponding to the green pixels and the gray pixels respectively, and then making a comprehensive judgment based on the possible light source points to determine the accurate color ratio coefficient of the actual light source point, so as to provide the device with an accurate color temperature compensation value based on the color ratio coefficient of the actual light source point.

However, this method of color temperature compensation does not propose the use of flash to compensate the color temperature of the actual light source point, and cannot fully tap the potential of the terminal device to achieve color temperature compensation by relying on its own components. In some special scenes, such as when the overall color in the picture tends to be gray, it is difficult to find the green calibration point, resulting in large errors in color temperature calculation.

The second method is to perform color temperature compensation based on a single-color flash; specifically, the color temperature of the current scene is estimated using the white balance parameters and the color temperature information of the fill light (the flash in the pre-flash stage), thereby guiding the white balance work. The specific process is: the compensation control of the fill light is determined using the color temperature of the image obtained before and after the single fill light is turned on, so that the proportion of the flash light to the ambient light can be calculated based on the brightness information corresponding to the compensation control, so that the flash light can assist the automatic white balance algorithm of the terminal device.

However, this color temperature compensation method is also limited by the overall color of the image, which can easily lead to errors in calculating the color temperature of the current scene. In addition, the color temperature compensation range is small and can only be adjusted between the current scene color temperature and the flash color temperature.

The embodiment of the present disclosure provides a color temperature compensation method, and FIG2 is a flowchart of a color temperature compensation method according to an exemplary embodiment of the present disclosure. As shown in FIG2 , the color temperature compensation method may include:

Step S101, based on the color temperature of the ambient light in the current shooting environment of the terminal device, determining the color temperature adjustment range provided by at least two flashlights in the terminal device in the current shooting environment;

Step S102, obtaining a target color temperature of the terminal device;

Step S103, if the target color temperature is within the color temperature adjustment range, determining at least one target flash light from the at least two flash lights;

Step S104, using the at least one target flash to perform color temperature compensation on the current shooting environment; wherein the color temperature of the ambient light after compensation based on the at least one target flash is the same as the target color temperature.

In the embodiment of the present disclosure, the color temperature compensation method can be applied to a terminal device, which can be a device including at least two monochrome flashlights of different colors, such as a mobile phone, a tablet computer, etc. The monochrome flashlights of different colors can be flashlights that can emit light of different color temperatures, such as a red flashlight, a green flashlight, etc.

In step S101, based on the color temperature of the ambient light in the current shooting environment of the terminal device and at least two monochrome flashes of different colors in the terminal device, the color temperature adjustment range provided by the terminal device in the current shooting environment can be determined.

The ambient light color temperature is a measurement value of the color components contained in the current shooting ambient light.

It is understandable that the configuration parameters of the flash in the terminal device can be determined based on at least two different colored monochrome flashes in the terminal device. The color temperature adjustment range of the terminal device can be determined based on the ambient light color temperature of the current shooting environment of the terminal device and the configuration parameters of the flash.

The configuration parameters of the flashlight include at least: an illumination angle and a flash index. The configuration parameters of the flashlight can be obtained from the factory manual of the flashlight, experimental testing, and other methods.

It is understandable that since the brightness parameters and color temperature parameters of the flash configured in the terminal device are fixed, the color temperature of the light emitted by the flash at the same brightness in different environments is the same; since the color temperature of ambient light in different environments is different, the color temperature of ambient light after compensation for different environments based on the flash may be different.

The ambient light color temperature of the current shooting environment of the terminal device can be obtained, and the light color temperatures of the light emitted by each flash when it is at multiple different working brightnesses can be obtained respectively; based on the ambient light color temperature and multiple light color temperatures of each of at least two flashes, the ambient light color temperature after color temperature compensation using the flashes at different working brightnesses can be determined respectively; based on the multiple compensated ambient light color temperatures corresponding to each flash, the color temperature adjustment range provided by each flash in the terminal device under the current shooting environment can be determined.

After obtaining the color temperature adjustment range of each flash under the current shooting environment, based on the colors of at least two flashes and their respective color temperature adjustment areas, the color temperature adjustment range when at least two flashes simultaneously perform color temperature compensation for the current shooting environment can be obtained. This color temperature adjustment range is the color temperature adjustment range provided by at least two of the flashes in the terminal device under the current shooting environment.

It should be noted that the compensated color temperature of the flash in the terminal device when performing color temperature compensation for the current shooting environment under different ambient light color temperatures can be obtained by computer software simulation or by detection by a detection device, and the embodiments of the present disclosure do not specifically limit this.

The color temperature of the ambient light of the current shooting environment of the terminal device can be obtained by a detection module in the terminal device, and the detection module is used to obtain the color temperature of the ambient light of the current shooting environment by detecting relevant parameters. Optionally, the detection module can be a color temperature sensor.

It should be noted that the color temperature of the ambient light in the current shooting environment of the terminal device may also be determined by other methods, and the embodiments of the present disclosure do not specifically limit this.

In step S102, the target color temperature of the terminal device may be obtained based on the preset shooting mode of the terminal device. The value of the target color temperature is equal to the white balance parameter set in the preset shooting mode of the terminal device, and the white balance parameter is expressed in color temperature. Exemplarily, the preset shooting mode may include: daylight mode, white balance (color temperature) 3000K; rainy day mode, white balance (color temperature) 4500K.

In some embodiments, the target color temperature of the terminal device may also be acquired based on the white balance parameters set by the user when the terminal device starts the shooting mode.

It is understandable that the terminal device can obtain the white balance parameters set by the user through the user's operation on the display screen or the user's command input into the terminal device, and then obtain the target color temperature.

It should be noted that the target color temperature of the terminal device may also be determined by other methods, which is not specifically limited in the embodiments of the present disclosure.

In step S103, if the target color temperature is within the color temperature adjustment range, which means that the ambient light color temperature can be compensated to the target color temperature, at least one flash that realizes the color temperature compensation is determined from the at least two flashes, and the at least one flash is the target flash.

It can be understood that the target color temperature is within the color temperature adjustment range, which means that the target color temperature is within the compensation color temperature range when the flash performs color temperature compensation on the current shooting environment. Then, after the flash compensates for the color temperature of the ambient light, the target color temperature can be obtained.

It should be noted that the target color temperature is at least within the compensated color temperature range formed when one flash performs color temperature compensation in the current shooting environment. Therefore, it is only necessary to determine at least one flash that realizes the color temperature compensation from the at least two flashes, so as to use the at least one target flash to realize the color temperature compensation in the embodiment of the present disclosure.

In step S104, the at least one target flash light obtained in step S103 may be used to perform color temperature compensation on the current shooting environment, so that the color temperature of the compensated ambient light is the same as the target color temperature.

It is understandable that the at least one target flash obtained in step S103 can change the working state so that the color temperature of the ambient light is compensated to the target color temperature. The color temperature of the ambient light compensated by the at least one target flash should be the same as the target color temperature.

The working state of the target flashlight at least includes the working brightness of the target flashlight. It is understandable that when the working brightness of the target flashlight is different, the color temperature of the light emitted by the target flashlight is also different, and the color temperature of the ambient light after color temperature compensation based on the light emitted by the target flashlight may also be different; then, by determining the working brightness of the target flashlight, the target flashlight is controlled to switch to the working brightness, so as to use the light emitted by the target flashlight at the working brightness to perform color temperature compensation on the current shooting environment, so that the color temperature of the compensated ambient light is the same as the target color temperature, thereby achieving color temperature compensation for the current shooting environment.

In the disclosed embodiment, based on the ambient light color temperature of the current shooting environment of the terminal device, the color temperature adjustment range provided by at least two different colored monochromatic flashes in the terminal device under the current shooting environment can be determined; by obtaining the target color temperature of the terminal device, and when the target color temperature is within the color temperature adjustment range, that is, when the ambient light color temperature can be adjusted to the target color temperature, at least one target flash is determined from at least two flashes to perform color temperature compensation on the current shooting environment, so that the compensated ambient light color temperature is the same as the target color temperature, so as to achieve the target color temperature required for taking pictures and meet the required photographic effect. In addition, compared with the color temperature adjustment range that can be provided by a monochromatic flash, at least two different colored monochromatic flashes can provide a larger color temperature compensation range to meet more user needs.

Optionally, FIG3 is a second flow chart of a color temperature compensation method according to an exemplary embodiment of the present disclosure. As shown in FIG3, step S101 determines the color temperature adjustment range provided by at least two flashlights in the terminal device under the current shooting environment based on the ambient light color temperature of the current shooting environment of the terminal device, including:

Step S201, obtaining the ambient light color temperature of the current shooting environment of the terminal device;

Step S202, detecting the compensated color temperature of each of the at least two flashes when performing color temperature compensation for the current shooting environment at the maximum working brightness;

Step S203: determining the color temperature adjustment range that can be provided by the terminal device under the current shooting environment based on the obtained compensated color temperatures of at least two of the flashes and the color temperature of the ambient light.

In the embodiment of the present disclosure, in step S201, the color temperature of the ambient light of the current shooting environment of the terminal device can be obtained through a detection module in the terminal device, for example, a color temperature sensor.

It can be understood that the color temperature sensor is a sensor that can detect the color temperature of the surrounding environment, and can directly collect the color temperature of the ambient light in the current shooting environment. Compared with other methods of detecting ambient light, it can obtain a more accurate color temperature of the ambient light.

In step S202, the detection module in the terminal device can also detect the compensated color temperature when each of the at least two flashes performs color temperature compensation on the current shooting environment at the maximum working brightness.

It should be noted that the compensated color temperature when each of the flashes performs color temperature compensation on the current shooting environment at the maximum working brightness refers to the color temperature of the ambient light after each of the flashes performs color temperature compensation on the current shooting environment at the maximum working brightness.

Exemplarily, FIG4 is a schematic diagram of a device for a color temperature compensation method according to an exemplary embodiment of the present disclosure. As shown in FIG4 , the terminal device may include a camera 21, three flashes 22 of different colors (which may be a red flash, a green flash, and a blue flash) and a color temperature sensor 23. The color temperature sensor 23 may obtain the color temperature of the ambient light of the current shooting environment by detecting the subject 24 under the irradiation of the ambient light 26. The color temperature sensor 23 may also detect the subject 24 under the irradiation of the ambient light 26 and the three flashes 22 of different colors to obtain the compensated color temperature when the three flashes 22 of different colors perform color temperature compensation on the current shooting environment.

The process of the color temperature sensor 23 obtaining the compensated color temperature when the three flashes 22 of different colors perform color temperature compensation on the current shooting environment includes: starting the red flash to emit light at the maximum working brightness, and turning off the green flash and the blue flash. The color temperature sensor 23 detects the color temperature of the mixed light 25 (red light plus ambient light) reflected to the color temperature detector 23 by the subject 24 under the combined influence of the red flash and the ambient light 26. The color temperature of the mixed light 25 is the compensated color temperature when the red flash performs color temperature compensation on the current shooting environment. Similarly, the green flash and the blue flash are turned on respectively to obtain the compensated color temperature when the green flash and the blue flash perform color temperature compensation on the current shooting environment, thereby obtaining the compensated color temperature when the three flashes 22 of different colors perform color temperature compensation on the current shooting environment.

It is understandable that the mixed light 25 detected by the color temperature sensor 23 is the same as the mixed light 25 incident on the camera 21. Therefore, the color temperature detected by the color temperature sensor 23 is equivalent to the color temperature of the ambient light incident on the camera 21, that is, the color temperature of the ambient light after color temperature compensation of the current shooting environment of the terminal device.

In step S203, based on the compensated color temperature of each of the at least two flashes and the color temperature of the ambient light, a compensable color temperature range between the compensated color temperature of each flash and the color temperature of the ambient light can be obtained; based on multiple compensable color temperature ranges, the color temperature adjustment range that the terminal device can provide under the current shooting environment can be determined.

It can be understood that when the color of each flash is different, the compensable color temperature range generated by each flash relative to the ambient light is different. By processing multiple compensable color temperature ranges accordingly, the color temperature adjustment range that the terminal device can provide under the current shooting environment can be determined.

In the embodiment of the present disclosure, the color temperature detector in the terminal device can directly detect the ambient light color temperature of the current shooting environment and the compensated color temperature when different colored flashes perform color temperature compensation on the current shooting environment, and based on the compensated color temperature and the ambient light color temperature, the color temperature adjustment range provided by the terminal device in the current shooting environment can be obtained. The method is simple and easy to implement.

Optionally, FIG5 is a flow chart of a color temperature compensation method according to an exemplary embodiment of the present disclosure. As shown in FIG5, the step S101 determines the color temperature adjustment range that can be provided by the terminal device under the current shooting environment based on the obtained compensated color temperatures of at least two flashes and the ambient light color temperature, including:

Step S401, based on the compensated color temperatures of the at least two flashlights and the color temperature of the ambient light, respectively determining a first coordinate point corresponding to the at least two compensated color temperatures and a second coordinate point corresponding to the color temperature of the ambient light in a preset color coordinate system;

Step S402: the second coordinate point and any adjacent two of the at least two first coordinate points enclose at least one color temperature adjustment sub-region; any two color temperature adjustment sub-regions in the at least one color temperature adjustment sub-region do not overlap each other;

Step S403: determining the color temperature adjustment range that can be provided by the terminal device under the current shooting environment based on the color temperature range corresponding to at least one color temperature adjustment sub-region.

In the embodiment of the present disclosure, in step S401, based on the compensated color temperatures of the at least two flash lights and the color temperature of the ambient light obtained in steps S201 to S202, a first coordinate point corresponding to the compensated color temperatures of the at least two flash lights in a preset color coordinate system and a second coordinate point corresponding to the color temperature of the ambient light in the preset color coordinate system can be obtained through a color temperature conversion formula.

The preset color coordinate system may be a color coordinate system, which is a color coordinate system, also called a colorimetric system, including a Munsell colorimetric system, a CIE (International Commission on Illumination) colorimetric system, and the like.

The color temperature conversion formula can be used to convert any color temperature value to its coordinate point in the color system, so as to intuitively represent its color in the color system.

Exemplarily, when the colorimetric system is the CIE-XYZ colorimetric system, the color temperature conversion formula may include:

When the color temperature is greater than 7000K, use formula (1) to calculate the coordinate point of the color temperature:

x＝-2.0064*(10 ⁹ /cct ³ )+1.9018*(10 ⁶ /cct ² )+0.2478*(10 ³ /cct)+0.237040

y＝-3*x ² +2.87*x-0.275 (1)

When the color temperature is less than or equal to 7000K, the color temperature coordinate point is calculated using formula (2):

x＝-4.607*(10 ⁹ /cct ³ )+2.9678*(10 ⁶ /cct ² )+0.09911*(10 ³ /cct)+0.244063

y＝-3*x ² +2.87*x-0.275 (2)

In the above formula (1) and formula (2), cct is the color temperature, x is the X chromaticity coordinate of the color temperature in the CIE-XYZ color system, and y is the Y chromaticity coordinate of the color temperature in the CIE-XYZ color system.

In step S402, the distribution positions of the second coordinate point and at least two of the first coordinate points can be obtained by using at least two first coordinate points corresponding to the compensated color temperature of the flash in the preset color coordinate system and the second coordinate point corresponding to the ambient light color temperature in the preset color coordinate system.

Any two adjacent first coordinate points and the second coordinate point of the at least two first coordinate points are connected in pairs to form a color temperature adjustment sub-region. Multiple groups of any two adjacent first coordinate points and the second coordinate point can form multiple non-overlapping color temperature adjustment sub-regions.

Exemplarily, FIG6 is a schematic diagram of a color temperature adjustment range of a terminal device equipped with three monochrome flash lamps of different colors according to an exemplary embodiment of the present disclosure. As shown in FIG6, the X chromaticity coordinate in the CIE-XYZ color system is equivalent to the proportion of the red primary color, and the Y chromaticity coordinate is equivalent to the proportion of the green primary color. The position of each wavelength (460nm-620nm in the figure) of the horseshoe-shaped spectrum track can be seen: the red band of the spectrum is concentrated in the lower right part of the track, the green band is concentrated in the upper part of the track, and the blue band is concentrated in the lower left part of the track.

Coordinate point a is the second coordinate point corresponding to the ambient light color temperature obtained according to the above formula (1) and formula (2) in the preset color coordinate system, coordinate point b, coordinate point c and coordinate point d are respectively the first coordinate points corresponding to the three compensated color temperatures obtained according to the above formula (1) and formula (2) in the preset color coordinate system, any two adjacent first coordinate points and the second coordinate point enclose a color temperature adjustment sub-region (for example, color temperature adjustment sub-region A), and the three first coordinate points and the second coordinate points enclose three color temperature adjustment sub-regions, such as color temperature adjustment sub-region A, color temperature adjustment sub-region B and color temperature adjustment sub-region C.

The two adjacent first coordinate points refer to two first coordinate points between which there are no other first coordinate points in the preset coordinate system, that is, the color ratio of the two adjacent first coordinate points is the closest color ratio compared to the color parameters of other first coordinate points.

It should be noted that the color parameter is a unique spectral tristimulus value corresponding to each coordinate point in the preset color coordinate system, that is, each coordinate point corresponds to a unique ratio on the three parameters of RGB (red, green and blue). Exemplarily, as shown in FIG6 , coordinate point b and coordinate point d can be the compensated color temperature when the green flash and the red flash are at the maximum working brightness respectively, and the color temperature compensation is performed on the current shooting environment, and the coordinate point b and the coordinate point d constitute two adjacent first coordinate points.

After determining the first coordinate points corresponding to any two adjacent flashes of different colors, that is, the coordinate points of the compensated color temperature when the two adjacent flashes of different colors are turned on in the preset coordinate system, a closed area is determined based on the two first coordinate points and the second coordinate points. The coordinate points in the closed area can be understood as the compensated color temperature that can be achieved when the two flashes of different colors jointly compensate for the color temperature of the ambient light.

By adjusting the brightness of two flash lights of different colors, the colors of the light emitted by the two flash lights of different colors can be changed, so that the coordinate points in the closed area can be obtained by compensating the color temperature of the current shooting environment according to the mixed light generated by the two different colors of light.

Exemplarily, as shown in FIG6 , the coordinate points in the closed area formed by the coordinate points a, b, and d can be obtained by turning on the green flash light and the red flash light at the same time.

In step S403, based on the at least one color temperature adjustment sub-region obtained in step S402, the color temperature range corresponding to the color temperature adjustment sub-region can be determined, thereby determining the color temperature adjustment range that the terminal device can provide under the current shooting environment.

It can be understood that, based on all the coordinate points contained in the color temperature adjustment sub-area, the color temperatures corresponding to all the coordinate points can be determined, thereby determining the color temperature range corresponding to the color temperature adjustment sub-area; based on the color temperature ranges corresponding to all the color temperature sub-areas, the color temperature adjustment range that the terminal device can provide under the current shooting environment can be determined.

In the embodiment of the present disclosure, by introducing a preset color coordinate system and obtaining the coordinate points of the compensation color temperature and the ambient light color temperature in the preset color coordinate system, the color temperature adjustment range that the terminal device can provide under the current shooting environment can be intuitively determined based on the coordinate points, thereby significantly improving the accuracy of obtaining the color temperature adjustment range, thereby achieving more accurate color temperature compensation.

Optionally, if the target color temperature is within the color temperature adjustment range, determining at least one target flash light from the at least two flash lights comprises:

Determine a target coordinate point corresponding to the target color temperature in a preset color coordinate system;

Determining a positional relationship between the target coordinate point and at least one of the color temperature adjustment sub-regions;

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region, two flashes corresponding to the color temperature adjustment sub-region where the target coordinate point is located are determined as the target flashes.

In the embodiment of the present disclosure, the same color temperature conversion formula can be used to convert the target color temperature into a corresponding target coordinate point in a preset color coordinate system, and based on the determined positional relationship between the target coordinate point and at least one of the color temperature adjustment sub-areas, different compensation schemes can be used to perform color temperature compensation.

For example, Fig. 7 is a schematic diagram of color temperature in a preset color coordinate system according to an exemplary embodiment of the present disclosure. As shown in Fig. 7, the curve _Tc (K) represents the position points of different color temperatures in the CIE-XYZ color system (the figure shows the position points of some color temperatures from 1500K to 10000K).

If the position relationship indicates that the target coordinate point is not located in the color temperature adjustment sub-area, it means that even if at least two flashes of the terminal device are used to compensate for the color temperature of the current shooting environment, the compensated ambient light color temperature cannot reach the target color temperature. At this time, other color temperature compensation methods can be used to compensate for the color temperature of the current shooting environment.

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-area (including the interior of the color temperature adjustment sub-area and the edge connection line of the color temperature adjustment sub-area), the two flashes corresponding to the color temperature adjustment sub-area where the target coordinate point is located are determined as the target flashes.

It is understandable that the two flashes corresponding to the color temperature adjustment sub-area refer to the flashes corresponding to the two first coordinate points constituting the color temperature adjustment sub-area, for example, the flashes corresponding to the coordinate points b and d constituting the color temperature adjustment sub-area A shown in FIG6 .

In the embodiment of the present disclosure, by determining the position of the target coordinate point and determining the positional relationship between the position of the target coordinate point and at least one color temperature adjustment sub-region, a flash light that compensates for the color temperature of the ambient light can be obtained.

Optionally, using the at least one target flash to perform color temperature compensation on the current shooting environment includes:

respectively determining the distances between the target coordinate point and two first coordinate points corresponding to the color temperature adjustment sub-region where the target coordinate point is located;

Determining color compensation parameters of the two target flash lights based on a ratio between the distances corresponding to the two first coordinate points;

Based on the color compensation parameters, respectively determining the target working brightness of the two target flash lamps;

The color temperature of the current shooting environment is compensated by using the two target flash lamps at the target working brightness.

In the embodiment of the present disclosure, when it is determined that the target coordinate point is located in the color temperature adjustment sub-area, two first coordinate points corresponding to the color temperature adjustment sub-area may be determined, and then the distances between the target coordinate point and the two first coordinate points may be determined according to the positions of the two coordinate points and the target coordinate point.

Assume that the distance between the target coordinate point and the first first coordinate point is a first value, and the distance between the target coordinate point and the second first coordinate point is a second value. The first value may be the same as the second value, or may be different from the second value.

Based on the ratio of the first value to the second value, the color compensation parameters of the target flash lights corresponding to the two first coordinate points can be determined. The first value is related to the color compensation parameters of the target flash lights corresponding to the first first coordinate point, and the second value is related to the color compensation parameters of the target flash lights corresponding to the two first coordinate points.

It can be understood that the color compensation parameter is the ratio of the color that the target flash needs to present when compensating the ambient light color temperature to the target color temperature to the maximum color of the flash. Exemplarily, when the ratio of the first value to the second value is 4:6, the color compensation parameter of the target flash corresponding to the first first coordinate point can be 40%, that is, the color of the target flash when it is turned on is 40% of the maximum color of the flash; the color compensation parameter of the target flash corresponding to the second first coordinate point can be 60%, that is, the color of the target flash when it is turned on is 60% of the maximum color of the flash.

In some embodiments, the maximum color of the flashlight can be obtained by calibrating the flashlight. The calibration method can be: in a completely dark environment, turn on the flashlight at the maximum working brightness, and start the detection module to obtain the maximum color of the flashlight.

The target working brightness of the two target flash lamps can be determined respectively based on the color compensation parameters. The color temperature of the ambient light can be compensated to the target color temperature by using the two target flash lamps at the target working brightness to perform color temperature compensation on the current shooting environment.

The target working brightness refers to the working brightness of the target flash lamp when it emits a specific color.

It is understandable that, based on the color compensation parameter, the percentage of the target flashlight's maximum color can be determined to determine the target flashlight's operating color. At the same time, based on the required operating color, the target operating brightness of the two target flashlights can be determined.

In the embodiment of the present disclosure, by determining the distance between the target flash and the two first coordinate points corresponding to the color temperature adjustment sub-region, the target working brightness of the target flash can be quantified, thereby achieving compensation for the color temperature of ambient light.

Optionally, if the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region, determining two flashes corresponding to the color temperature adjustment sub-region where the target coordinate point is located as the target flashes includes:

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-area, determining whether the target coordinate point is located on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-area and the second coordinate point;

If the target coordinate point is not on the connecting line, the two flashes corresponding to the color temperature adjustment sub-area are determined as the target flashes.

In the embodiment of the present disclosure, if the position relationship indicates that the target coordinate point is located in one of the color temperature adjustment sub-areas, it is necessary to determine whether the target coordinate point is located on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-area and the second coordinate point. Here, the line connecting the first coordinate point and the second coordinate point refers to a straight line formed by the first coordinate point to the second coordinate point in a preset color coordinate system.

If the target coordinate point is not on the connecting line, that is, is located in a triangular area enclosed between two first coordinate points and one second coordinate point corresponding to the color temperature adjustment sub-area, the two flashes corresponding to the two first coordinate points forming the color temperature adjustment sub-area can be determined as the target flashes.

It can be understood that the target coordinate point is located in the triangular area enclosed by two first coordinate points and one second coordinate point corresponding to the color temperature adjustment sub-area, that is, the color temperature of the ambient light after color temperature compensation of the current shooting environment using only a monochrome flash cannot reach the required target color temperature, and it is necessary to use the mixed color light generated by two monochrome flashes of different colors to compensate for the current shooting environment. Therefore, the flashes corresponding to the two first coordinate points are determined as target flashes, and the color temperature of the ambient light is compensated based on the target flashes, so as to realize the color temperature compensation scheme in the embodiment of the present disclosure.

Optionally, the method comprises:

If the target coordinate point is on the connection line, the flash corresponding to the first coordinate point forming the connection line is determined as the target flash.

In an embodiment of the present disclosure, if the target coordinate point is on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-area and the second coordinate point, the flash corresponding to the first coordinate point forming the line can be determined as the target flash.

It should be noted that if the target coordinate point is located on the connecting line, it means that the color temperature of the ambient light after color temperature compensation of the current shooting environment using the light generated by the monochromatic flash has been able to reach the required target color temperature. Therefore, the flash corresponding to the first coordinate point on the connecting line is determined as the target flash, and the color temperature of the ambient light is compensated based on the target flash, so as to realize the color temperature compensation scheme in the embodiment of the present disclosure.

In the embodiment of the present disclosure, compared with the solution of using two eye flashes to compensate for the color temperature of ambient light, one target flash compensates for the color temperature of ambient light, which is energy-saving and highly efficient.

The present disclosure also provides the following embodiments:

FIG8 is a fourth flow chart of a color temperature compensation method according to an exemplary embodiment of the present disclosure, wherein the method includes:

S701, detecting the color temperature of the ambient light in the current shooting environment of the terminal device;

S702, detecting three compensated color temperatures when each of the RGB flash lamps performs color temperature compensation for the current shooting environment at the maximum working brightness;

S703, obtaining a target color temperature of the terminal device;

S704, determining the second coordinate point, three first coordinate points and the target coordinate point corresponding to the ambient light color temperature, the three compensation color temperatures and the target color temperature in the CIE-XYZ color system;

S705, if the target coordinate point is located in the color temperature adjustment sub-region enclosed by the first coordinate point and any two of the three second coordinate points, determine whether the target coordinate point is on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-region and the second coordinate point;

S706, if the target coordinate point is not on the connecting line, two flashes corresponding to the color temperature adjustment sub-area are determined as target flashes;

S707, determining the distance between the target coordinate point and two first coordinate points corresponding to the color temperature adjustment sub-region where the target coordinate point is located;

S708, determining target working brightness of the two target flash lights respectively based on the ratio between the distances corresponding to the two first coordinate points;

S709: Perform color temperature compensation on the current shooting environment by using the two target flash lamps at the target working brightness.

In the disclosed embodiment, by using the ambient light color temperature of the current shooting environment of the terminal device, the compensated color temperature that the RGB flash can provide in the current shooting environment, and the target color temperature of the terminal device, it can be determined whether the target color temperature is within the color temperature adjustment range provided by the RGB flash in the current shooting environment. And when the target color temperature is within the color temperature adjustment range, indicating that the ambient light color temperature can be adjusted to the target color temperature, two target flashes are determined to perform color temperature compensation on the current shooting environment, so that the compensated ambient light color temperature is the same as the target color temperature, and then the target color temperature required for taking pictures is achieved to meet the required photographic effect. In addition, compared with the color temperature adjustment range that can be provided by a monochrome flash, the RGB flash can provide a larger color temperature compensation range to meet more user needs.

The embodiment of the present application provides a color temperature compensation device 800. FIG9 is a schematic diagram of the structure of a color temperature compensation device according to an exemplary embodiment of the present disclosure. As shown in FIG9 , the color temperature compensation device 800 is provided in a terminal device including at least two monochrome flash lamps of different colors, including:

A first determination module 830 is used to determine the color temperature adjustment range provided by at least two flash lamps in the terminal device under the current shooting environment based on the color temperature of the ambient light in the current shooting environment of the terminal device;

An acquisition module 840 is used to acquire a target color temperature of the terminal device;

A second determination module 850 is configured to determine at least one target flash light from the at least two flash lights if the target color temperature is within the color temperature adjustment range;

The compensation module 860 is used to use the at least one target flash to perform color temperature compensation on the current shooting environment; wherein the color temperature of the ambient light after compensation based on the at least one target flash is the same as the target color temperature.

Optionally, the first determining module 830 is further used to obtain the color temperature of the ambient light of the current shooting environment of the terminal device;

Detecting the compensated color temperature of each of the at least two flashes when performing color temperature compensation for the current shooting environment at the maximum working brightness;

Based on the obtained compensated color temperatures of at least two of the flashes and the color temperature of the ambient light, the color temperature adjustment range that can be provided by the terminal device under the current shooting environment is determined.

Optionally, the first determination module 830 is further configured to respectively determine, in a preset color coordinate system, first coordinate points corresponding to the at least two compensated color temperatures and a second coordinate point corresponding to the ambient light color temperature based on the compensated color temperatures of the at least two flashes and the ambient light color temperature;

The second coordinate point and any adjacent two of the at least two first coordinate points enclose at least one color temperature adjustment sub-region; any two color temperature adjustment sub-regions in the at least one color temperature adjustment sub-region do not overlap each other;

Based on the color temperature range corresponding to at least one color temperature adjustment sub-area, the color temperature adjustment range that can be provided by the terminal device under the current shooting environment is determined.

Optionally, the second determination module 850 is used to determine a target coordinate point corresponding to the target color temperature in a preset color coordinate system;

Determining a positional relationship between the target coordinate point and at least one of the color temperature adjustment sub-regions;

If the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region, two flashes corresponding to the color temperature adjustment sub-region where the target coordinate point is located are determined as the target flashes.

Optionally, the compensation module 860 is further configured to respectively determine the distances between the target coordinate point and two first coordinate points corresponding to the color temperature adjustment sub-region where the target coordinate point is located;

Determining color compensation parameters of the two target flash lights based on a ratio between the distances corresponding to the two first coordinate points;

Based on the color compensation parameters, respectively determining the target working brightness of the two target flash lamps;

The color temperature of the current shooting environment is compensated by using the two target flash lamps at the target working brightness.

Optionally, the second determination module 850 is configured to determine whether the target coordinate point is located on a line connecting any one of the two first coordinate points corresponding to the color temperature adjustment sub-region and the second coordinate point if the position relationship indicates that the target coordinate point is located within the color temperature adjustment sub-region;

If the target coordinate point is not on the connecting line, the two flashes corresponding to the color temperature adjustment sub-area are determined as the target flashes.

Optionally, the second determination module 850 is configured to determine the flash corresponding to the first coordinate point forming the connection line as the target flash if the target coordinate point is on the connection line.

Fig. 10 is a block diagram of a terminal device according to an exemplary embodiment of the present disclosure. For example, the terminal device 80 may be a mobile phone, a mobile computer, etc. The terminal device 80 includes: at least two monochrome flashlights of different colors.

10 , the terminal device 80 may include one or more of the following components: a processing component 83 , a memory 84 , a power component 85 , a multimedia component 86 , an audio component 87 , an input/output (I/O) interface 88 , a sensor component 89 , and a communication component 810 .

The processing component 83 generally controls the overall operation of the terminal device 80, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 83 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 83 may include one or more modules to facilitate the interaction between the processing component 83 and other components. For example, the processing component 83 may include a multimedia module to facilitate the interaction between the multimedia component 86 and the processing component 83.

The memory 84 is configured to store various types of data to support operations on the terminal device 80. Examples of such data include instructions for any application or method operating on the terminal device 80, contact data, phone book data, messages, pictures, videos, etc. The memory 84 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The power supply component 85 provides power to various components of the terminal device 80. The power supply component 85 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the terminal device 80.

The multimedia component 86 includes a screen that provides an output interface between the terminal device 80 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 86 includes a front camera and/or a rear camera. When the terminal device 80 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 87 is configured to output and/or input audio signals. For example, the audio component 87 includes a microphone (MIC), and when the terminal device 80 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 84 or sent via the communication component 810. In some embodiments, the audio component 87 also includes a speaker for outputting audio signals.

I/O interface 88 provides an interface between processing component 83 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button and lock button.

The sensor assembly 89 includes one or more sensors for providing various aspects of status assessment for the terminal device 80. For example, the sensor assembly 89 can detect the open/closed state of the device 80, the relative positioning of the components, such as the display and keypad of the terminal device 80, and the sensor assembly 89 can also detect the position change of the terminal device 80 or a component of the terminal device 80, the presence or absence of contact between the user and the terminal device 80, the orientation or acceleration/deceleration of the terminal device 80, and the temperature change of the terminal device 80. The sensor assembly 89 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 89 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 89 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 810 is configured to facilitate wired or wireless communication between the terminal device 80 and other devices. The terminal device 80 can access a wireless network based on a communication standard, such as Wi-Fi, 4G or 5G, or a combination thereof. In an exemplary embodiment, the communication component 810 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 810 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the terminal device 80 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by a processor 820 of the terminal device 80 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A color temperature compensation method applied to a terminal device including at least two monochromatic flashlights of different colors, comprising:

Determining a color temperature adjusting range provided by at least two flash lamps in the terminal equipment under the current shooting environment based on the ambient light color temperature of the current shooting environment of the terminal equipment;

acquiring a target color temperature of the terminal equipment;

if the target color temperature is within the color temperature adjusting range, determining at least one target flash lamp from the at least two flash lamps;

performing color temperature compensation on the current shooting environment by using the at least one target flash lamp; wherein the color temperature of the ambient light compensated based on the at least one target flash is the same as the target color temperature.

2. The method according to claim 1, wherein said determining a color temperature adjustment range provided by at least two of said flash lamps in said terminal device in a current shooting environment based on an ambient light color temperature of a current shooting environment of said terminal device comprises:

Acquiring the ambient light color temperature of the current shooting environment of the terminal equipment;

Detecting a compensated color temperature when each of at least two flash lamps performs color temperature compensation on a current photographing environment at a maximum working brightness;

And determining the color temperature adjusting range which can be provided by the terminal equipment under the current shooting environment based on the obtained compensated color temperatures of the at least two flashlights and the ambient light color temperature.

3. The method according to claim 2, wherein said determining the color temperature adjustment range that the terminal device is able to provide in the current shooting environment based on the obtained compensated color temperatures of the at least two flash lamps and the ambient light color temperature comprises:

Based on the compensation color temperatures of the at least two flash lamps and the ambient light color temperature, respectively determining a first coordinate point corresponding to the at least two compensation color temperatures and a second coordinate point corresponding to the ambient light color temperature in a preset color coordinate system;

the second coordinate point and any adjacent two first coordinate points in the at least two first coordinate points are enclosed to form at least one color temperature adjusting sub-area; any two color temperature adjustment subareas in the at least one color temperature adjustment subarea are not overlapped with each other;

And determining the color temperature adjusting range which can be provided by the terminal equipment under the current shooting environment based on the color temperature range corresponding to the at least one color temperature adjusting subarea.

4. The method of claim 3, wherein determining at least one target flash from the at least two flashes if the target color temperature is within the color temperature adjustment range comprises:

Determining a corresponding target coordinate point of the target color temperature in a preset color coordinate system;

Determining the position relation between the target coordinate point and at least one color temperature regulation subarea;

And if the position relation indicates that the target coordinate point is positioned in the color temperature adjustment subarea, determining two flashlamps corresponding to the color temperature adjustment subarea in which the target coordinate point is positioned as the target flashlamp.

5. The method of claim 4, wherein said compensating for the color temperature of the current photographic environment using said at least one target flash comprises:

Respectively determining the distance between two first coordinate points corresponding to the color temperature regulation subareas where the target coordinate points are located and the target coordinate points;

Determining color compensation parameters of the two target flashlights based on the ratio between the distances corresponding to the two first coordinate points;

determining target working brightness of the two target flashlights respectively based on the color compensation parameters;

and performing color temperature compensation on the current shooting environment by using the two target flashlamps at the target working brightness.

6. The method of claim 4, wherein determining two flashlamps corresponding to the color temperature adjustment sub-region in which the target coordinate point is located as the target flashlamp if the positional relationship indicates that the target coordinate point is located in the color temperature adjustment sub-region comprises:

if the position relationship indicates that the target coordinate point is located in the color temperature adjustment sub-area, determining whether the target coordinate point is located on a connecting line of any one of the first coordinate point and the second coordinate point in the two first coordinate points corresponding to the color temperature adjustment sub-area;

And if the target coordinate point is not located on the connecting line, determining the two flash lamps corresponding to the color temperature adjusting sub-region as the target flash lamp.

7. The method according to claim 6, characterized in that the method comprises:

And if the target coordinate point is on the connecting line, determining a flash lamp corresponding to the first coordinate point forming the connecting line as the target flash lamp.

8. A color temperature compensation apparatus provided in a terminal device including at least two monochromatic flashlights of different colors, comprising:

The first determining module is used for determining a color temperature adjusting range provided by at least two flash lamps in the terminal equipment under the current shooting environment based on the ambient light color temperature of the current shooting environment of the terminal equipment;

The acquisition module is used for acquiring the target color temperature of the terminal equipment;

the second determining module is used for determining at least one target flash lamp from the at least two flash lamps if the target color temperature is in the color temperature adjusting range;

The compensation module is used for compensating the color temperature of the current shooting environment by utilizing the at least one target flash lamp; wherein the color temperature of the ambient light compensated based on the at least one target flash is the same as the target color temperature.

9. A terminal device, comprising:

at least two monochromatic flashlights of different colors;

A memory for storing processor-executable instructions;

a processor connected to the memory;

wherein the processor is configured to perform the color temperature compensation method of any one of claims 1 to 7.

10. A non-transitory computer readable storage medium, which when executed by a processor of a terminal device, causes the terminal device to perform the color temperature compensation method of any one of claims 1 to 7.