CN104767984A - Method and terminal for adjusting color temperature of flash light - Google Patents

Abstract

The embodiment of the invention discloses a method for adjusting the color temperature of a flash lamp and a terminal. Wherein, the method includes: in the photographing mode, when the flash is turned on, acquiring the color temperature value of the current light environment of the preview image; if the acquired color temperature value is between the high color temperature threshold and the low color temperature threshold, adjusting the flash It is a medium color temperature flashlight, wherein the high color temperature threshold is greater than the low color temperature threshold, and the color temperature of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold. The implementation of the embodiment of the present invention can adjust the color temperature of the flashlight and improve the photographing effect.

Description

Method and terminal for adjusting color temperature of flash light

technical field

The present invention relates to the technical field of intelligent terminals, in particular to a method for adjusting the color temperature of a flashlight and a terminal.

Background technique

As the camera configuration of the terminal is getting higher and higher, users are more and more fond of using the terminal to take pictures. Among them, the flashlight in the camera configuration is an essential key configuration for taking pictures. When the ambient light intensity is insufficient, the user can use The flash is used to assist in taking pictures to obtain better photo effects. Currently, the most common flash is a high color temperature flash. In practice, it has been found that high color temperature flash can produce better results in high color temperature scenes, but when the high color temperature flash is in low color temperature scenes, the photos taken are either blue in some areas or red in some areas. It is because the high color temperature flash is equivalent to a mixed light source when it is in a low color temperature scene. This mixed light source cannot simulate the light environment of the current shooting scene, so that the photo effect is not good.

Contents of the invention

Embodiments of the present invention provide a method for adjusting the color temperature of a flashlight and a terminal, which can adjust the color temperature of the flashlight and improve the photographing effect.

The first aspect of the embodiment of the present invention discloses a method for adjusting the color temperature of a flashlight, including:

In photo mode, when the flash is on, get the color temperature value of the current light environment of the preview image;

If the obtained color temperature value is between the high color temperature threshold and the low color temperature threshold, adjust the flashlight to be a medium color temperature flashlight, wherein the high color temperature threshold is greater than the low color temperature threshold, and the color temperature value of the medium color temperature flashlight between the high color temperature threshold and the low color temperature threshold.

The second aspect of the embodiment of the present invention discloses a terminal, including:

The acquiring unit is used to acquire the color temperature value of the current light environment of the preview image when the flash is turned on in the photographing mode;

An adjustment unit, configured to adjust the flashlight to be a medium color temperature flashlight when the color temperature value acquired by the acquisition unit is between a high color temperature threshold and a low color temperature threshold, wherein the high color temperature threshold is greater than the low color temperature threshold , and the color temperature value of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold.

In the embodiment of the present invention, when the terminal is in the photographing mode, when the flashlight is turned on, it acquires the color temperature value of the current light environment of the preview image, and when the acquired color temperature value is between the high color temperature threshold and the low color temperature threshold, the terminal adjusts the The flashlight is a medium color temperature flashlight, wherein the high color temperature threshold is greater than the low color temperature threshold, and the color temperature of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold. Through the embodiment of the present invention, when the color temperature of the current light environment of the preview image is a normal color temperature, the terminal can adjust the flashlight to a medium color temperature flashlight, so that the color temperature of the flashlight is consistent with the color temperature of the current light environment, thereby improving the photographing effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic flowchart of a method for adjusting the color temperature of a flashlight disclosed in an embodiment of the present invention;

Fig. 2 is a schematic flowchart of another method for adjusting the color temperature of a flashlight disclosed in an embodiment of the present invention;

Fig. 3 is a schematic flowchart of another method for adjusting the color temperature of a flashlight disclosed in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a terminal disclosed in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another terminal disclosed in an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of another terminal disclosed in an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the invention discloses a method for adjusting the color temperature of a flashlight and a terminal, which can adjust the color temperature of the flashlight and improve the photographing effect. Each will be described in detail below.

In the embodiment of the present invention, the terminal may include any camera terminal equipped with a flashlight, such as a smart phone, a tablet computer, a notebook computer, a palmtop computer, and the like. Wherein, the operating system of the terminal may include but not limited to Android operating system, IOS operating system, Symbian (Symbian) operating system, Black Berry (Blackberry) operating system, Windows Phone8 operating system, etc., which are not limited by the embodiments of the present invention .

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of a method for adjusting the color temperature of a flashlight disclosed in an embodiment of the present invention. As shown in Figure 1, the method may include the following steps:

S101. In the photographing mode, when the flash is turned on, acquire the color temperature value of the current light environment of the preview image.

In the embodiment of the present invention, the color temperature is the color of the light emitted, that is, the color of the spectral components of the light source. The unit of color temperature is represented by (K). When the color of light is blue, blue or blue-purple, it is usually called high color temperature. When the color of light is red, orange, or yellow, it is usually called low color temperature. When the color is white, it is usually called normal color temperature (that is, medium color temperature). Among them, any color can only get its own normal color when it is irradiated by white light.

Generally, the color temperature value of high color temperature is generally not less than 5000K, the color temperature value of low color temperature is generally not greater than 3100K, and the color temperature value of medium color temperature is between 3100K and 5000K.

As an optional implementation manner, the specific implementation manner of step S101 may include the following steps:

11) Obtain the RGB value of the current light environment of the preview image;

12) Determine the color temperature value corresponding to the RGB value of the current light environment of the preview image.

In this embodiment, the terminal can calculate the RGB (red, green, blue) value of the current light environment of the preview image through a specific algorithm (such as a white balance algorithm), and further determine the RGB value of the current light environment of the preview image through the RGB value. The value corresponds to the color temperature value. Among them, the RGB (red, green, blue) values each have 256 levels of brightness, expressed as numbers from 0, 1, 2...255, the color of any light source can be determined by these three colors according to different Mixed proportions.

As another optional implementation, the specific implementation of the above step 12) may be:

According to the pre-acquired mapping relationship between RGB and color temperature, select the color temperature value corresponding to the RGB value of the current light environment of the preview image from the mapping relationship.

In this embodiment, the foregoing mapping relationship may be calculated in advance through experiments, or may be generated through an operation instruction input by a user, which is not limited in this embodiment of the present invention.

As another optional implementation, the specific implementation of the above step 12) may be:

Calculate the color temperature value corresponding to the RGB value of the current light environment of the preview image through a white balance algorithm.

In this embodiment, the white balance is an index describing the white accuracy after the three primary colors of red, green and blue are mixed, and the white balance algorithm can be used to solve a series of problems of color restoration and tone processing. Algorithms commonly used for white balance may include, but are not limited to, the gray world method, the perfect inverse color method, and algorithms for white balance based on automatic threshold processing.

As an optional implementation manner, before step S101, the method may further include the following steps:

21) Receive an instruction to start the camera mode;

22) Respond to the command to start the camera mode, and start the camera mode.

In this embodiment, the photographing mode activation command may be a photographing mode activation command input by the user, for example, the user clicks the photographing mode activation button of the terminal, or the above-mentioned photographing mode activation command may be a photographing mode activation command automatically generated by the terminal , for example: an instruction to start the camera mode that automatically enters the camera mode at a specific time.

As another optional implementation, the specific implementation of the above step 21) and step 22) may include the following steps:

21) Receive an instruction to start the camera mode;

22) Output prompt information, which is used to prompt input of information to be verified;

23) receiving the information to be verified inputted in response to the prompt information;

24) Verifying whether the information to be verified is consistent with the preset verification information set in advance;

25) If it is verified that the information to be verified is consistent with the preset verification information, responding to the command to enable the photographing mode and enabling the photographing mode.

In this embodiment, after the terminal receives the command to enable the photographing mode, the terminal will output prompt information for prompting input of information to be verified; and the terminal may output an information input port for input of information to be verified.

In this embodiment, the information to be verified may include but not limited to password to be verified, fingerprint information to be verified, face shape information to be verified, iris information to be verified, retina information to be verified, and voiceprint information to be verified. Several combinations.

In this embodiment, the preset verification information may include but not limited to a preset verification password, a preset verification fingerprint information, a preset verification face shape information, a preset verification iris information, a preset verification retina information, and a preset Verify any one or a combination of voiceprint information.

Optionally, in this embodiment, the above-mentioned preset verification information may include fingerprint string information and the input time corresponding to each fingerprint; then correspondingly, verifying whether the information to be verified is consistent with the preset verification information may include the following steps:

Verify whether the fingerprint string is the same as the fingerprint string included in the preset verification information, and whether the difference between the input time of the same fingerprint is less than the preset value, if the verification fingerprint string is the same as the fingerprint string included in the preset verification information, and the same fingerprint If the difference between the input times is smaller than the preset value, it can be verified that the information to be verified is consistent with the preset verification information; otherwise, it can be verified that the information to be verified is inconsistent with the preset verification information. Wherein, by implementing this implementation manner, it is possible to prevent an illegal user from enabling the camera mode on the terminal, thereby effectively preventing the terminal from being arbitrarily operated by the illegal user.

Optionally, in this embodiment, the aforementioned preset verification information may include password information and biometric information (any one or a combination of fingerprint information, face shape information, iris information, retina information, and voiceprint information) , then correspondingly, verifying whether the information to be verified is consistent with the preset verification information may include the following steps:

Verifying whether the input password information is the same as the preset password information, when verifying that the input password information is the same as the preset password information, verifying whether the input biological information is the same as the preset biological information, if verifying that the input biological information is the same If the preset biological information is the same, it can be verified that the information to be verified is consistent with the preset verification information; on the contrary, if the biological information input for verification is different from the preset biological information, it can be verified that the information to be verified is inconsistent with the preset verification information. Wherein, by implementing this implementation manner, it is possible to prevent an illegal user from stealing password information to enable a camera mode, thereby effectively preventing the terminal from being arbitrarily operated by an illegal user.

S102. If the acquired color temperature value is between the high color temperature threshold and the low color temperature threshold, adjust the flashlight to be a medium color temperature flashlight.

In the embodiment of the present invention, since the color temperature is divided into three types: high color temperature, medium color temperature, and low color temperature, there are also three types of color temperatures of the light environment acquired by the terminal. When the obtained color temperature value is between the high color temperature threshold and the low color temperature threshold, in order to keep the color temperature of the light source provided by the flash consistent with the color temperature of the light environment, it is necessary to turn on the medium color temperature flash. Wherein, the above-mentioned high color temperature threshold is greater than the above-mentioned low color temperature threshold, for example: the high color temperature threshold is 5000K, the low color temperature threshold is 3100K, and the color temperature of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold, assuming a high The color temperature threshold is A, the low color temperature threshold is B, and the color temperature of the medium color temperature flash is C, then correspondingly, there is a relationship A>C>B, where A, B, and C are all positive integers greater than 0.

It should be noted that the flashlights provided in the embodiments of the present invention can cover three color temperatures (high color temperature, medium color temperature, and low color temperature). Therefore, the corresponding flashlights include high color temperature flashlights, medium color temperature flashlights, and low color temperature flashlights. According to the change of the color temperature of the external light environment, select the flash with the corresponding color temperature to ensure the effect of the flash photo.

S103. Determine a white balance value corresponding to the adjusted color temperature value of the flashlight according to the pre-acquired correspondence between the color temperature and the white balance.

In the embodiment of the present invention, under various light conditions, the color of the object will change due to the color of the projected light, and photos taken under different light conditions will have different color temperatures. In this regard, white objects change most obviously: under indoor tungsten lighting, white objects will look orange-yellow, and the scene shot under such lighting conditions will be yellowish; but if it is in a blue sky Under these conditions, there will be a bluish tinge, and the scene shot under such lighting conditions will be bluish. In order to reduce the influence of external light on the target color as much as possible, and to restore the original color of the subject under different color temperature conditions, color correction is required to achieve the correct color balance, which is called white balance adjustment. .

It can be seen that white balance adjustment is related to the normal restoration of color and the use of hue. It can be considered that white balance is the manager of color temperature. Therefore, it is necessary to obtain the white balance value corresponding to the adjusted color temperature of the flash.

In this embodiment of the present invention, the corresponding relationship may be calculated in advance through experiments, or generated through an operation instruction input by a user, which is not limited in this embodiment of the present invention.

S104. Adjust the white balance of the preview image according to the white balance value.

In the embodiment of the present invention, there are generally multiple modes of white balance to adapt to shooting in different scenes, such as automatic white balance, tungsten light white balance, fluorescent white balance, indoor white balance, manual adjustment, etc. No matter which mode of white balance, it has a corresponding white balance value. The terminal can adjust the white balance of the preview image according to the white balance value corresponding to the white balance mode selected by the user, so that the color of the preview image can be restored normally, improve the effect of taking photos, and meet the aesthetic requirements of the user.

In the method flow described in FIG. 1, when the terminal is in the photographing mode, when the flash is turned on, the color temperature value of the current light environment of the preview image is obtained, and when the obtained color temperature value is between the high color temperature threshold and the low color temperature threshold , the terminal adjusts the flashlight to be a medium color temperature flashlight, wherein the high color temperature threshold is greater than the low color temperature threshold, and the color temperature of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold. Through the embodiment of the present invention, when the color temperature of the current light environment of the preview image is a normal color temperature, the terminal can adjust the flashlight to a medium color temperature flashlight, so that the color temperature of the flashlight is consistent with the color temperature of the current light environment, thereby improving the photographing effect.

Please refer to FIG. 2 . FIG. 2 is a schematic flowchart of another method for adjusting the color temperature of a flashlight disclosed in an embodiment of the present invention. As shown in Figure 2, the method may include the following steps:

S201. The terminal acquires the color temperature value of the current light environment of the preview image when the flashlight is turned on in the photographing mode.

S202. If the acquired color temperature value is greater than or equal to the high color temperature threshold, the terminal adjusts the flashlight to be a high color temperature flashlight.

In the embodiment of the present invention, since the color temperature is divided into three types: high color temperature, medium color temperature, and low color temperature, there are also three types of color temperatures of the light environment acquired by the terminal. When the obtained color temperature value is greater than or equal to the high color temperature threshold, in order to keep the color temperature of the light source provided by the flash consistent with the color temperature of the light environment, the terminal needs to adjust the flash to a high color temperature flash. Wherein, the color temperature value of the high color temperature flash lamp is greater than or equal to the high color temperature threshold value, assuming that the high color temperature threshold value is A, and the color temperature value of the high color temperature flash lamp is B, then correspondingly, there is a relationship B>A, where A and B are both It is a positive integer greater than 0. Normally, A can be 5000K.

It should be noted that the flashlights provided in the embodiments of the present invention can cover three color temperatures (high color temperature, medium color temperature, and low color temperature). Therefore, the corresponding flashlights include high color temperature flashlights, medium color temperature flashlights, and low color temperature flashlights. According to the change of the color temperature of the external light environment, select the flash with the corresponding color temperature to ensure the effect of the flash photo.

S203. The terminal determines a white balance value corresponding to the adjusted color temperature value of the flashlight according to the pre-acquired correspondence between the color temperature and the white balance.

S204. The terminal adjusts the white balance of the preview image according to the white balance value.

It should be noted that, for steps S201, S203, and S204 in the embodiment of the present invention, reference may be made to the description of steps S101, S103, and S104 in Embodiment 1, respectively, and details are not repeated here.

In the method flow described in FIG. 2, when the terminal is in the photographing mode, when the flashlight is turned on, the color temperature value of the current light environment of the preview image is obtained, and when the obtained color temperature value is greater than or equal to the high color temperature threshold, the flashlight is adjusted to A high color temperature flashlight, wherein the color temperature of the high color temperature flashlight is greater than or equal to the high color temperature threshold. Through the embodiment of the present invention, when the color temperature of the current light environment of the preview image is a high color temperature, the terminal can adjust the flashlight to a high color temperature flashlight, so that the color temperature of the flashlight is consistent with the color temperature of the current light environment, thereby improving the photographing effect.

Please refer to FIG. 3 . FIG. 3 is a schematic flowchart of another method for adjusting the color temperature of a flashlight disclosed in an embodiment of the present invention. As shown in Figure 3, the method may include the following steps:

S301. The terminal acquires the color temperature value of the current light environment of the preview image when the flashlight is turned on in the photographing mode.

S302. If the acquired color temperature value is less than or equal to the low color temperature threshold, the terminal adjusts the flashlight to be a low color temperature flashlight.

In the embodiment of the present invention, since the color temperature is divided into three types: high color temperature, medium color temperature, and low color temperature, there are also three types of color temperatures of the light environment acquired by the terminal. When the obtained color temperature value is less than or equal to the low color temperature threshold, in order to keep the color temperature of the light source provided by the flash consistent with the color temperature of the light environment, the terminal needs to adjust the flash to a low color temperature flash. Wherein, the color temperature value of the low color temperature flashlight is less than or equal to the low color temperature threshold, assuming that the low color temperature threshold is A, and the color temperature value of the low color temperature flashlight is B, then correspondingly, there is a relationship B<A, where A and B are both It is a positive integer greater than 0. Normally, B can be 3100K.

It should be noted that the flashlights provided in the embodiments of the present invention can cover three color temperatures (high color temperature, medium color temperature, and low color temperature). Therefore, the corresponding flashlights include high color temperature flashlights, medium color temperature flashlights, and low color temperature flashlights. According to the change of the color temperature of the external light environment, select the flash with the corresponding color temperature to ensure the effect of the flash photo.

S303. The terminal determines a white balance value corresponding to the adjusted color temperature value of the flashlight according to the pre-acquired correspondence between the color temperature and the white balance.

S304. The terminal adjusts the white balance of the preview image according to the white balance value.

It should be noted that, for steps S301, S303, and S304 in the embodiment of the present invention, reference may be made to the description of steps S101, S103, and S104 in Embodiment 1, and details are not repeated here.

In the method flow described in FIG. 3, when the terminal is in the photographing mode, when the flashlight is turned on, the color temperature value of the current light environment of the preview image is obtained, and when the obtained color temperature value is less than or equal to the low color temperature threshold, the flashlight is adjusted to A low color temperature flashlight, wherein the color temperature value of the low color temperature flashlight is less than or equal to the low color temperature threshold. Through the embodiment of the present invention, when the color temperature of the current light environment of the preview image is a low color temperature, the terminal can adjust the flashlight to a low color temperature flashlight, so that the color temperature of the flashlight is consistent with the color temperature of the current light environment, thereby improving the photographing effect.

The following are the device embodiments of the present invention, which are used to implement the methods implemented in the first to third method embodiments of the present invention. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed. , please refer to Embodiment 1, Embodiment 2 and Embodiment 3 of the present invention.

Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a terminal disclosed in an embodiment of the present invention. As shown in FIG. 4, the terminal 400 may include: an acquisition unit 401 and an adjustment unit 402, wherein:

The acquiring unit 401 is configured to acquire the color temperature value of the current light environment of the preview image when the flash is turned on in the photographing mode.

In the embodiment of the present invention, the color temperature is the color of the light emitted, that is, the color of the spectral components of the light source. The unit of color temperature is represented by (K). When the color of light is blue, blue or blue-purple, it is usually called high color temperature. When the color of light is red, orange, or yellow, it is usually called low color temperature. When the color is white, it is usually called normal color temperature (that is, medium color temperature). Among them, any color can only get its own normal color when it is irradiated by white light.

Generally, the color temperature value of high color temperature is generally not less than 5000K, the color temperature value of low color temperature is generally not greater than 3100K, and the color temperature value of medium color temperature is between 3100K and 5000K.

The adjusting unit 402 is configured to adjust the flashlight to be a flashlight with a medium color temperature when the color temperature value acquired by the acquiring unit 401 is between a high color temperature threshold and a low color temperature threshold, wherein the high color temperature threshold is greater than the low color temperature threshold, and the medium color temperature threshold is greater than the low color temperature threshold. The color temperature value of the color temperature flashlight is between the high color temperature threshold and the low color temperature threshold.

In the embodiment of the present invention, since the color temperature is divided into three types: high color temperature, medium color temperature and low color temperature, the color temperature of the light environment acquired by the acquisition unit 401 also has three types. When the color temperature value acquired by the acquisition unit 401 is between the high color temperature threshold and the low color temperature threshold, in order to keep the color temperature of the light source provided by the flash consistent with the color temperature of the light environment, the adjustment unit 402 needs to adjust the flash to a medium color temperature flash. Wherein, the above-mentioned high color temperature threshold is greater than the above-mentioned low color temperature threshold, for example: the high color temperature threshold is 5000K, the low color temperature threshold is 3100K, and the color temperature of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold, assuming a high The color temperature threshold is A, the low color temperature threshold is B, and the color temperature of the medium color temperature flash is C, then correspondingly, there is a relationship A>C>B, where A, B, and C are all positive integers greater than 0.

It should be noted that the flashlights provided in the embodiments of the present invention can cover three color temperatures (high color temperature, medium color temperature, and low color temperature). Therefore, the corresponding flashlights include high color temperature flashlights, medium color temperature flashlights, and low color temperature flashlights. According to the change of the color temperature of the external light environment, select the flash with the corresponding color temperature to ensure the effect of the flash photo.

As an optional implementation, the adjustment unit 402 is further configured to adjust the flashlight to be a high color temperature flashlight when the color temperature value acquired by the acquisition unit 401 is greater than or equal to the high color temperature threshold, wherein the color temperature value of the high color temperature flashlight Greater than or equal to the high color temperature threshold.

In this embodiment, when the color temperature value acquired by the acquisition unit 401 is greater than or equal to the high color temperature threshold, in order to keep the color temperature of the light source provided by the flash consistent with the color temperature of the light environment, the adjustment unit 402 needs to adjust the flash to a high color temperature flash . Wherein, the color temperature value of the high color temperature flash lamp is greater than or equal to the high color temperature threshold value, assuming that the high color temperature threshold value is A, and the color temperature value of the high color temperature flash lamp is B, then correspondingly, there is a relationship B>A, where A and B are both It is a positive integer greater than 0. Normally, A can be 5000K.

As another optional implementation, the adjustment unit 402 is further configured to adjust the flashlight to a low color temperature flashlight when the color temperature value acquired by the acquisition unit 401 is less than or equal to the low color temperature threshold, wherein the color temperature value of the low color temperature flashlight Less than or equal to the low color temperature threshold.

In this embodiment, when the color temperature value acquired by the acquisition unit 401 is less than or equal to the low color temperature threshold, in order to keep the color temperature of the light source provided by the flash consistent with the color temperature of the light environment, the adjustment unit 402 needs to adjust the flash to a low color temperature flash. Wherein, the color temperature value of the low color temperature flashlight is less than or equal to the low color temperature threshold, assuming that the low color temperature threshold is A, and the color temperature value of the low color temperature flashlight is B, then correspondingly, there is a relationship B<A, where A and B are both It is a positive integer greater than 0. Normally, B can be 3100K.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of another terminal disclosed in an embodiment of the present invention, wherein the terminal shown in FIG. 5 is further optimized on the basis of the terminal shown in FIG. Compared with the terminal shown in FIG. 5, except that the terminal shown in FIG. 5 includes all the units of the terminal shown in FIG. 4, the acquisition unit 401 shown in FIG. 5 may include:

An acquisition subunit 4011, configured to acquire the RGB value of the current light environment of the preview image;

The determination subunit 4012 is configured to determine the color temperature value corresponding to the RGB value of the current light environment of the preview image.

In this embodiment, the acquisition subunit 4011 can calculate the RGB (red, green, blue) value of the current light environment of the preview image through a specific algorithm (such as a white balance algorithm), and further use the RGB value through the determination subunit 4012, Determine the color temperature value corresponding to the RGB value of the current light environment of the preview image. Among them, the RGB (red, green, blue) values each have 256 levels of brightness, expressed as numbers from 0, 1, 2...255, the color of any light source can be determined by these three colors according to different Mixed proportions.

Optionally, the specific implementation manner of determining the color temperature value corresponding to the RGB value of the current light environment of the preview image by the determining subunit 4012 may be as follows:

According to the pre-acquired mapping relationship between RGB and color temperature, select the color temperature value corresponding to the RGB value of the current light environment of the preview image from the mapping relationship.

In this embodiment, the foregoing mapping relationship may be calculated in advance through experiments, or may be generated through an operation instruction input by a user, which is not limited in this embodiment of the present invention.

Optionally, the specific implementation manner of determining the color temperature value corresponding to the RGB value of the current light environment of the preview image by the determining subunit 4012 may be as follows:

Through the white balance algorithm, calculate the color temperature value corresponding to the RGB value of the current light environment of the preview image.

In this embodiment, the white balance is an index describing the white accuracy after the three primary colors of red, green and blue are mixed, and the white balance algorithm can be used to solve a series of problems of color restoration and tone processing. Algorithms commonly used for white balance may include, but are not limited to, the gray world method, the perfect inverse color method, and algorithms for white balance based on automatic threshold processing.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of another terminal disclosed in an embodiment of the present invention, wherein the terminal shown in FIG. 6 is further optimized on the basis of the terminal shown in FIG. Compared with the terminal shown in FIG. 6, in addition to including all the units of the terminal shown in FIG. 6, the terminal 400 shown in FIG. 6 may also include:

The determination unit 403 is configured to determine a white balance value corresponding to the adjusted color temperature value of the flashlight according to the pre-acquired correspondence between the color temperature and the white balance.

In the embodiment of the present invention, under various light conditions, the color of the object will change due to the color of the projected light, and photos taken under different light conditions will have different color temperatures. In this regard, white objects change most obviously: under indoor tungsten lighting, white objects will look orange-yellow, and the scene shot under such lighting conditions will be yellowish; but if it is in a blue sky Under these conditions, there will be a bluish tinge, and the scene shot under such lighting conditions will be bluish. In order to reduce the influence of external light on the target color as much as possible, and to restore the original color of the subject under different color temperature conditions, color correction is required to achieve the correct color balance, which is called white balance adjustment. .

It can be seen that the white balance adjustment is related to the normal restoration of the color and the use of the color tone. It can be considered that the white balance is the manager of the color temperature. Therefore, the determination unit 403 needs to determine the adjusted flash light according to the pre-acquired correspondence between the color temperature and the white balance. The white balance value corresponding to the color temperature value.

In this embodiment of the present invention, the corresponding relationship may be calculated in advance through experiments, or generated through an operation instruction input by a user, which is not limited in this embodiment of the present invention.

The adjustment unit 402 is further configured to adjust the white balance of the preview image according to the white balance value.

In the embodiment of the present invention, there are generally multiple modes of white balance to adapt to shooting in different scenes, such as automatic white balance, tungsten light white balance, fluorescent white balance, indoor white balance, manual adjustment, etc. No matter which mode of white balance, it has a corresponding white balance value. The adjustment unit 402 can adjust the white balance of the preview image according to the white balance value corresponding to the white balance mode selected by the user, so that the color of the preview image can be restored normally, improve the effect of taking photos, and meet the aesthetic requirements of the user.

As an optional implementation manner, the terminal 400 shown in FIG. 6 may further include:

The receiving unit 404 is configured to receive a photographing mode start instruction before the acquiring unit 401 acquires the color temperature value of the current light environment of the preview image when the flash is turned on in the photographing mode.

The enabling unit 405 is configured to enable the photographing mode in response to the photographing mode enabling instruction.

In this embodiment, the photographing mode activation command may be a photographing mode activation command input by the user, for example, the user clicks the photographing mode activation button of the terminal, or the above-mentioned photographing mode activation command may be a photographing mode activation command automatically generated by the terminal , for example: an instruction to start the camera mode that automatically enters the camera mode at a specific time.

As another optional implementation manner, the terminal 400 shown in FIG. 6 may further include:

The output unit 406 is configured to output prompt information after the receiving unit 404 receives the photographing mode activation instruction, and the prompt information is used to prompt input of information to be verified;

The above-mentioned receiving unit 404 is further configured to receive information to be verified inputted in response to the prompt information;

A verification unit 407, configured to verify whether the information to be verified is consistent with the preset verification information set in advance;

The enabling unit 405 is specifically configured to enable the photographing mode in response to the photographing mode enabling instruction when the verifying unit 407 verifies that the information to be verified is consistent with the preset verification information.

In this embodiment, after the receiving unit 404 receives the camera mode start instruction, the output unit 406 will output prompt information for prompting input of the information to be verified; and the output unit 406 may output the information to be verified for input of the information to be verified input port.

In this embodiment, the information to be verified may include but not limited to password to be verified, fingerprint information to be verified, face shape information to be verified, iris information to be verified, retina information to be verified, and voiceprint information to be verified. Several combinations.

In this embodiment, the preset verification information may include but not limited to a preset verification password, a preset verification fingerprint information, a preset verification face shape information, a preset verification iris information, a preset verification retina information, and a preset Verify any one or a combination of voiceprint information.

Optionally, in this embodiment, the above-mentioned preset verification information may include fingerprint string information and the input time corresponding to each fingerprint; then correspondingly, the verification unit 407 verifying whether the information to be verified is consistent with the preset verification information may include The following steps:

Verify whether the fingerprint string is the same as the fingerprint string included in the preset verification information, and whether the difference between the input time of the same fingerprint is less than the preset value, if the verification fingerprint string is the same as the fingerprint string included in the preset verification information, and the same fingerprint If the difference between the input times is smaller than the preset value, it can be verified that the information to be verified is consistent with the preset verification information; otherwise, it can be verified that the information to be verified is inconsistent with the preset verification information. Wherein, by implementing this implementation manner, it is possible to prevent an illegal user from enabling the camera mode on the terminal, thereby effectively preventing the terminal from being arbitrarily operated by the illegal user.

Optionally, in this embodiment, the aforementioned preset verification information may include password information and biometric information (any one or a combination of fingerprint information, face shape information, iris information, retina information, and voiceprint information) , then correspondingly, the verifying unit 407 verifying whether the information to be verified is consistent with the preset verification information may include the following steps:

Verifying whether the input password information is the same as the preset password information, when verifying that the input password information is the same as the preset password information, verifying whether the input biological information is the same as the preset biological information, if verifying that the input biological information is the same If the preset biological information is the same, it can be verified that the information to be verified is consistent with the preset verification information; otherwise, it can be verified that the information to be verified is inconsistent with the preset verification information. Wherein, by implementing this implementation manner, it is possible to prevent an illegal user from stealing password information to enable a camera mode, thereby effectively preventing the terminal from being arbitrarily operated by an illegal user.

In the terminal shown in Fig. 4, Fig. 5 and Fig. 6, the acquisition unit 401 acquires the color temperature value of the current light environment of the preview image when the flashlight is on in the photographing mode, and when the color temperature value acquired by the acquisition unit 401 is between When it is between the high color temperature threshold and the low color temperature threshold, the adjustment unit 402 adjusts the flashlight to a medium color temperature flashlight, wherein the high color temperature threshold is greater than the low color temperature threshold, and the color temperature of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold. between color temperature thresholds. Through the embodiment of the present invention, when the color temperature of the current light environment of the preview image is a normal color temperature, the terminal can adjust the flashlight to a medium color temperature flashlight, so that the color temperature of the flashlight is consistent with the color temperature of the current light environment, thereby improving the photographing effect.

It should be noted that, for the sake of simple description, all the aforementioned method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Because according to the application, certain steps may be performed in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and units involved are not necessarily required by this application.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in computer-readable storage media. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (14)

1. A method for adjusting the color temperature of a flashlight, comprising: In photo mode, when the flash is on, get the color temperature value of the current light environment of the preview image; If the obtained color temperature value is between the high color temperature threshold and the low color temperature threshold, adjust the flashlight to be a medium color temperature flashlight, wherein the high color temperature threshold is greater than the low color temperature threshold, and the color temperature value of the medium color temperature flashlight between the high color temperature threshold and the low color temperature threshold. 2. The method according to claim 1, characterized in that the method further comprises: If the acquired color temperature value is greater than or equal to the high color temperature threshold, adjust the flashlight to be a high color temperature flashlight, wherein the color temperature value of the high color temperature flashlight is greater than or equal to the high color temperature threshold. 3. The method according to claim 1, characterized in that the method further comprises: If the acquired color temperature value is less than or equal to the low color temperature threshold, adjust the flashlight to be a low color temperature flashlight, wherein the color temperature value of the low color temperature flashlight is less than or equal to the low color temperature threshold. 4. The method according to claim 1, wherein said obtaining the color temperature value of the current light environment of the preview image comprises: Get the RGB value of the current light environment of the preview image; Determine the color temperature value corresponding to the RGB value of the current light environment of the preview image. 5. The method according to claim 4, wherein the determining the color temperature value corresponding to the RGB value of the current light environment of the preview image comprises: According to the pre-acquired mapping relationship between RGB and color temperature, select the color temperature value corresponding to the RGB value of the current light environment of the preview image from the mapping relationship. 6. The method according to claim 4, wherein the determining the color temperature value corresponding to the RGB value of the current light environment of the preview image comprises: Calculate the color temperature value corresponding to the RGB value of the current light environment of the preview image through a white balance algorithm. 7. The method according to any one of claims 1 to 6, characterized in that the method further comprises: According to the corresponding relationship between the color temperature and the white balance obtained in advance, determine the white balance value corresponding to the adjusted color temperature value of the flashlight; Perform white balance adjustment on the preview image according to the white balance value. 8. A terminal, characterized in that, comprising: The acquiring unit is used to acquire the color temperature value of the current light environment of the preview image when the flash is turned on in the photographing mode; An adjustment unit, configured to adjust the flashlight to be a medium color temperature flashlight when the color temperature value acquired by the acquisition unit is between a high color temperature threshold and a low color temperature threshold, wherein the high color temperature threshold is greater than the low color temperature threshold , and the color temperature value of the medium color temperature flashlight is between the high color temperature threshold and the low color temperature threshold. 9. The terminal according to claim 8, wherein the adjustment unit is further configured to adjust the flashlight to be a high color temperature flashlight when the color temperature value acquired by the acquisition unit is greater than or equal to the high color temperature threshold , wherein, the color temperature value of the high color temperature flash lamp is greater than or equal to the high color temperature threshold. 10. The terminal according to claim 8, wherein the adjustment unit is further configured to adjust the flashlight to be a low color temperature flashlight when the color temperature value obtained by the acquisition unit is less than or equal to the low color temperature threshold , wherein, the color temperature value of the low color temperature flashlight is less than or equal to the low color temperature threshold. 11. The terminal according to claim 8, wherein the acquiring unit comprises: Get the subunit, used to get the RGB value of the current light environment of the preview image; The determination subunit is configured to determine the color temperature value corresponding to the RGB value of the current light environment of the preview image. 12. The terminal according to claim 11, wherein the determining subunit is specifically configured to select the RGB of the current light environment of the preview image from the mapping relationship according to the pre-acquired mapping relationship between RGB and color temperature. The value corresponds to the color temperature value. 13. The terminal according to claim 11, wherein the determining subunit is specifically configured to calculate the color temperature value corresponding to the RGB value of the current light environment of the preview image through a white balance algorithm. 14. The terminal according to any one of claims 8-13, wherein the terminal further comprises: A determination unit, configured to determine a white balance value corresponding to the adjusted color temperature value of the flashlight according to the pre-acquired correspondence between the color temperature and the white balance; The adjusting unit is further configured to adjust the white balance of the preview image according to the white balance value.