CN105049726B - A kind of mobile terminal photographic method and mobile terminal - Google Patents

Abstract

The embodiment of the present invention discloses a mobile terminal photographing method and the mobile terminal, wherein the method may include: receiving a photographing instruction triggered by a user; acquiring the face brightness value and background of the photographed person presented in the photographing preview screen according to the photographing instruction Brightness value; judging whether the exposure of the person to be photographed needs to be adjusted according to the brightness of the face and/or the background brightness; if it is determined that the exposure of the person to be photographed needs to be adjusted, adjust the exposure of the person to be photographed The face brightness value and/or the background brightness value are used to adjust the exposure of the person to be photographed; and the person to be photographed is photographed according to the adjusted exposure of the person to be photographed. By adopting the present invention, it is possible to automatically adjust the face brightness value and the background brightness value of the person to be photographed, and further adjust the exposure of the person to be photographed, so as to obtain a relatively high-quality image.

Description

A mobile terminal photographing method and mobile terminal

technical field

The invention relates to the field of photographing by a mobile terminal, in particular to a photographing method for a mobile terminal and a mobile terminal.

Background technique

With the diversification of functions of smart mobile terminals, users have higher and higher requirements for camera experience, and more and more attention has been paid to the camera function of mobile terminals. With the popularity of smart phones, people often use the front camera in the smart phone to take selfies. Due to cost or process considerations, there is currently no flash on the front camera. Therefore, when users take selfies, It needs to be carried out under better light conditions, so as to take better quality images. When the user uses the front camera to take a selfie, if the light in the user's avatar area is dark, and the background scene where the user is in is too bright, the captured image will be overexposed (that is, overexposed), resulting in poor image quality .

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a mobile terminal photographing method and a mobile terminal, which can automatically adjust the face brightness value and background brightness value of the photographed person, and then adjust the exposure of the photographed person, so as to photograph Relatively good quality images.

In a first aspect, an embodiment of the present invention provides a method for taking pictures of a mobile terminal, including:

Receive the camera instruction triggered by the user;

Obtaining the face brightness value and background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction;

judging whether it is necessary to adjust the exposure of the photographed person according to the face brightness value and/or the background brightness value;

If it is determined that the exposure of the person to be photographed needs to be adjusted, adjusting the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed;

The person to be photographed is photographed according to the adjusted exposure of the person to be photographed.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the judging whether to adjust the exposure of the photographed person according to the face brightness value and/or the background brightness value includes:

judging whether the face brightness value is less than a preset brightness threshold;

If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted;

The adjustment of the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person includes:

The brightness value of the face of the photographed person is increased to increase the exposure of the photographed person.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the judging whether to adjust the exposure of the photographed person according to the brightness value of the face and/or the brightness value of the background includes:

judging whether the face brightness value is smaller than the background brightness value;

If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the photographed person needs to be adjusted;

The adjustment of the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person includes:

Increase the brightness value of the face of the person to be photographed, and reduce the brightness value of the background to increase the exposure of the person to be photographed.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the adjusting the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person includes:

Outputting prompt information to prompt the user to adjust the face brightness value and/or background brightness value of the photographed person;

receiving a setting instruction from the user, increasing the brightness value of the face of the person to be photographed according to the setting instruction, and reducing the brightness value of the background to increase the exposure of the person to be photographed.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the shooting person in the shooting preview screen includes at least two people, and the acquisition of the shooting person presented in the shooting preview screen according to the shooting instruction The face brightness value and background brightness value, including:

Acquiring the face brightness value and the background brightness value of the person to be photographed with the largest face area among the at least two persons to be photographed according to the photographing instruction.

In a second aspect, an embodiment of the present invention provides a mobile terminal, including:

A receiving module, configured to receive a photographing instruction triggered by a user;

An acquisition module, configured to acquire the face brightness value and the background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction;

A judging module, configured to judge whether it is necessary to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background;

An adjustment module, configured to adjust the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed if it is determined that the exposure of the person to be photographed needs to be adjusted;

The photographing module is configured to photograph the photographed person according to the adjusted exposure of the photographed person.

With reference to the second aspect, in the first possible implementation manner of the second aspect, the judging module is specifically configured to judge whether the brightness value of the human face is less than a preset brightness threshold;

If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted;

The adjustment module is specifically configured to increase the face brightness value of the photographed person to increase the exposure of the photographed person if it is determined that the exposure of the photographed person needs to be adjusted.

With reference to the second aspect, in a second possible implementation of the second aspect, the judging module is specifically configured to judge whether the face brightness value is smaller than the background brightness value;

If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the photographed person needs to be adjusted;

The adjustment module is specifically configured to increase the brightness value of the face of the person to be photographed and lower the brightness value of the background to increase the exposure of the person to be photographed if it is determined that the exposure of the person to be photographed needs to be adjusted.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the adjustment module includes:

an output unit, configured to output prompt information to prompt the user to adjust the face brightness value and/or background brightness value of the photographed person;

The receiving unit is configured to receive a setting instruction from the user, and according to the setting instruction, increase the brightness value of the face of the subject to be photographed, and decrease the brightness value of the background to increase the exposure of the subject to be photographed.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the shooting person in the shooting preview screen includes at least two people, and the acquiring module is specifically configured to acquire the at least two people according to the photographing instruction. The face luminance value and the background luminance value of the person whose face area is the largest among the two photographed persons.

By implementing the embodiment of the present invention, the mobile terminal acquires the face brightness value and the background brightness value of the photographed person in the shooting preview screen, and if it detects that the face brightness value is lower than the preset brightness threshold, the face brightness is increased value, or if it is detected that the brightness value of the human face is lower than the brightness value of the background, the brightness value of the human face is increased, and the brightness value of the background is decreased, so as to increase the exposure of the person being photographed. And the user can make independent settings, adjust the face brightness value and the background brightness value of the photographed person, and finally the mobile terminal shoots the photographed person according to the adjusted exposure of the photographed person, so that the exposure of the photographed person can be adjusted, and the photographed Relatively good quality images.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flowchart of a first embodiment of a mobile terminal photographing method provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a second embodiment of a mobile terminal photographing method provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a third embodiment of a mobile terminal photographing method provided by an embodiment of the present invention;

Fig. 4 is a schematic interface diagram of a shooting preview screen provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first embodiment of a mobile terminal provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an adjustment module of a mobile terminal provided by an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a second embodiment of a mobile terminal provided by an embodiment of the present invention.

Detailed ways

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, not all, embodiments of the present invention. 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.

It should be noted that the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

Embodiments of the present invention provide a mobile terminal photographing method and the mobile terminal, which can automatically adjust the face brightness value and background brightness value of the photographed person, and then adjust the exposure of the photographed person, so as to capture a better quality image. In order to facilitate the understanding of the embodiment of the present invention, the method for taking pictures of the mobile terminal according to the embodiment of the present invention will be described below first.

Please refer to FIG. 1 , which is a schematic flow chart of the first embodiment of the mobile terminal photographing method provided by the embodiment of the present invention. The mobile terminal photographing method according to the embodiment of the present invention may include but not limited to the following steps.

S101. Receive a photographing instruction triggered by a user.

In the embodiment of the present invention, the mobile terminal receives a photographing instruction triggered by a user, so as to execute a photographing process. The mobile terminal displays a shooting preview screen, and the shooting preview screen displays the face and background of the person being photographed. Specifically, the photographing instruction may be a self-portrait instruction for the front camera of the mobile terminal, and when the mobile terminal receives the self-portrait instruction, the mobile terminal displays the photographing preview screen, and in the The shooting preview screen shows the faces and background of the person being shot. Wherein, the mobile terminal may include but not limited to: smart phones (such as Android phones, iOS phones, etc.), mobile Internet devices (MID, Mobile Internet Devices) or wearable smart devices and other mobile devices with camera functions. For example, when the user uses the camera function on the mobile terminal to take pictures, the user sends the camera instruction to the mobile terminal by touching a camera button or a camera icon on the terminal.

S103. According to the photographing instruction, acquire the face brightness value and the background brightness value of the person to be photographed presented in the shooting preview screen.

In the embodiment of the present invention, the mobile terminal acquires the face brightness value and the background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction, wherein the photographing person is displayed in the shooting preview screen The face and background of the person, the face can be collected by the mobile terminal through face recognition technology, the background is the external environment in which the user takes a photo, including the image in the shooting preview screen other than the face other areas. The brightness value of the human face depends on the strength of the external light. When the external light is strong, the brightness value of the human face is large; when the external light is weak, the brightness value of the human face is small. . The value of the background brightness depends on the background color and/or light intensity. For example, when the background brightness value depends on the background color, when the background color is cool, the background brightness value is small; when the background color is warm color, the background brightness value is large.

Further, if there are at least two photographed persons in the photographing preview screen, the mobile terminal acquires the face of the photographed person with the largest face area among the at least two photographed persons according to the photographing instruction. luminance value and the background luminance value. The area of the face with the largest detected face area is used as the metering area, so as to ensure the accurate exposure of the subject.

S105. Determine whether it is necessary to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background.

In the embodiment of the present invention, the mobile terminal judges whether it is necessary to adjust the exposure of the photographed person based on the obtained face brightness value and/or the background brightness value, and if it is judged that it is necessary to adjust the If the exposure of the person is determined, the mobile terminal adjusts the exposure of the person to be photographed, and if it is determined that the exposure of the person to be photographed does not need to be adjusted, the mobile terminal does not adjust the exposure of the person to be photographed.

Specifically, the manner in which the mobile terminal determines whether it is necessary to adjust the exposure of the photographed person may be: determining whether the brightness value of the human face is less than a preset brightness threshold. If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted; if it is determined that the brightness value of the human face is greater than or equal to the preset brightness threshold , the result of the judgment is that it is not necessary to adjust the exposure of the photographed person. The manner in which the mobile terminal determines whether it is necessary to adjust the exposure of the photographed person may also be: determining whether the brightness value of the human face is smaller than the brightness value of the background. If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the person to be photographed needs to be adjusted; if it is determined that the brightness value of the human face is greater than or equal to the brightness value of the background, then The result of the judgment is that there is no need to adjust the exposure of the photographed person. However, it can be understood that the above-mentioned judging methods of judging whether to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background are just two of them, and are not intended to limit the present invention. For example, it is also possible to judge whether the exposure of the subject needs to be adjusted under the current photographing environment through the clarity of the image in the shooting preview screen. If the clarity of the image is not high, the result of the judgment is that the subject needs to be adjusted. the exposure amount; if the definition of the image is high, it is judged that the exposure amount of the photographed person does not need to be adjusted.

S107. If it is determined that the exposure of the photographed person needs to be adjusted, adjust the face brightness value and/or the background brightness value of the photographed person to adjust the exposure of the photographed person.

In the embodiment of the present invention, if the mobile terminal determines that the exposure of the photographed person needs to be adjusted, then adjust the face brightness value and/or the background brightness value of the photographed person to adjust the exposure of the photographed person, To ensure better quality images are taken.

Specifically, the adjustment method of adjusting the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person may be: increasing the face brightness value of the photographed person to increase the exposure of the photographed person. The exposure of the person to be photographed is increased, or the brightness value of the face of the person to be photographed is lowered to reduce the exposure of the person to be photographed. The adjustment method of adjusting the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed may also be: increasing the face brightness value of the person to be photographed, and lowering the brightness value of the person to be photographed The background brightness value is increased to increase the exposure of the person being photographed, or the face brightness value of the person to be photographed is decreased, and the background brightness value is increased to reduce the exposure of the person to be photographed. However, it can be understood that the adjustment manners of adjusting the face brightness value and/or the background brightness value of the person to be photographed to adjust the exposure of the person to be photographed are just two forms, and are not intended to limit the present invention.

S109. Shoot the person to be photographed according to the adjusted exposure of the person to be photographed.

In the embodiment of the present invention, when the mobile terminal adjusts the face brightness value and/or background brightness value of the photographed person, thereby adjusting the exposure of the photographed person, the adjusted The exposure amount is used to shoot the person to be photographed, so that the quality of the photographed image is better.

In the embodiment of the present invention, the mobile terminal acquires the face brightness value and the background brightness value of the photographed person in the shooting preview screen, and judges whether it is necessary to adjust the exposure of the photographed person according to the face brightness value and the background brightness value, and if necessary adjustment, the mobile terminal adjusts the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person, and then adopts the adjusted exposure of the photographed person to Shoot to get better quality images.

Please refer to FIG. 2 , which is a schematic flow chart of the second embodiment of the mobile terminal photographing method provided by the embodiment of the present invention. The mobile terminal photographing method according to the embodiment of the present invention may include but not limited to the following steps.

S201. Receive a photographing instruction triggered by a user.

In the embodiment of the present invention, the mobile terminal receives a photographing instruction triggered by a user, so as to execute a photographing process. The mobile terminal displays a shooting preview screen, and the shooting preview screen displays the face and background of the person being photographed. Specifically, the photographing instruction may be a self-portrait instruction for the front camera of the mobile terminal, and when the mobile terminal receives the self-portrait instruction, the mobile terminal displays the photographing preview screen, and in the The shooting preview screen shows the faces and background of the person being shot. Wherein, the mobile terminal may include but not limited to: smart phones (such as Android phones, iOS phones, etc.), mobile Internet devices (MID, Mobile Internet Devices) or wearable smart devices and other mobile devices with camera functions. For example, when the user uses the camera function on the mobile terminal to take pictures, the user sends the camera instruction to the mobile terminal by touching a camera button or a camera icon on the terminal.

S203. Acquire, according to the photographing instruction, the face brightness value and the background brightness value of the person to be photographed presented in the shooting preview screen.

In the embodiment of the present invention, the mobile terminal acquires the face brightness value and the background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction, wherein the photographing person is displayed in the shooting preview screen The face and background of the person, the face can be collected by the mobile terminal through face recognition technology, the background is the external environment in which the user takes a photo, including the image in the shooting preview screen other than the face other areas. The brightness value of the human face depends on the strength of the external light. When the external light is strong, the brightness value of the human face is large; when the external light is weak, the brightness value of the human face is small. . The value of the background brightness depends on the background color and/or light intensity. For example, when the background brightness value depends on the background color, when the background color is cool, the background brightness value is small; when the background color is warm color, the background brightness value is large.

Further, if there are at least two photographed persons in the photographing preview screen, the mobile terminal acquires the face of the photographed person with the largest face area among the at least two photographed persons according to the photographing instruction. luminance value and the background luminance value. The area of the face with the largest detected face area is used as the metering area, so as to ensure the accurate exposure of the subject.

S205. Determine whether the face brightness value is smaller than the background brightness value.

In the embodiment of the present invention, the mobile terminal judges whether the face brightness value of the photographed person is smaller than the background brightness value, and if it is judged that the face brightness value is smaller than the background brightness value, step S207 is executed, and if If the face brightness value is greater than or equal to the background brightness value, this process ends.

S207. Increase the brightness value of the face of the subject to be photographed, and decrease the brightness value of the background to increase the exposure of the subject to be photographed.

In the embodiment of the present invention, if the mobile terminal determines that the face brightness value is smaller than the background brightness value, then the mobile terminal needs to increase the face brightness of the subject to be photographed in order to achieve a better shooting effect. value, and lower the background brightness value to ensure that the face brightness value of the subject is greater than or equal to the background brightness value, thereby increasing the exposure of the subject to ensure a better quality image .

S209. Shoot the person to be photographed according to the adjusted exposure of the person to be photographed.

In the embodiment of the present invention, when the mobile terminal adjusts the face brightness value and/or background brightness value of the photographed person, thereby adjusting the exposure of the photographed person, the adjusted The exposure amount is used to shoot the person to be photographed, so that the quality of the photographed image is better.

Please refer to FIG. 3 , which is a schematic flow chart of the third embodiment of the mobile terminal photographing method provided by the embodiment of the present invention. The mobile terminal photographing method according to the embodiment of the present invention may include but not limited to the following steps.

S301. Receive a photographing instruction triggered by a user.

In the embodiment of the present invention, the mobile terminal receives a photographing instruction triggered by a user, so as to execute a photographing process. The mobile terminal displays a shooting preview screen, and the shooting preview screen displays the face and background of the person being photographed. Specifically, the photographing instruction may be a self-portrait instruction for the front camera of the mobile terminal, and when the mobile terminal receives the self-portrait instruction, the mobile terminal displays the photographing preview screen, and in the The shooting preview screen shows the faces and background of the person being shot. Wherein, the mobile terminal may include but not limited to: smart phones (such as Android phones, iOS phones, etc.), mobile Internet devices (MID, Mobile Internet Devices) or wearable smart devices and other mobile devices with camera functions. For example, when the user uses the camera function on the mobile terminal to take pictures, the user sends the camera instruction to the mobile terminal by touching a camera button or a camera icon on the terminal.

S303. Acquire, according to the photographing instruction, the face brightness value and the background brightness value of the person to be photographed presented in the shooting preview screen.

In the embodiment of the present invention, the mobile terminal acquires the face brightness value and the background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction, wherein the photographing person is displayed in the shooting preview screen The face and background of the person, the face can be collected by the mobile terminal through face recognition technology, the background is the external environment in which the user takes a photo, including the image in the shooting preview screen other than the face other areas. The brightness value of the human face depends on the strength of the external light. When the external light is strong, the brightness value of the human face is large; when the external light is weak, the brightness value of the human face is small. . The value of the background brightness depends on the background color and/or light intensity. For example, when the background brightness value depends on the background color, when the background color is cool, the background brightness value is small; when the background color is warm color, the background brightness value is large.

Further, if there are at least two photographed persons in the photographing preview screen, the mobile terminal acquires the face of the photographed person with the largest face area among the at least two photographed persons according to the photographing instruction. luminance value and the background luminance value. The area of the face with the largest detected face area is used as the metering area, so as to ensure the accurate exposure of the subject.

S305. Determine whether the exposure of the photographed person needs to be adjusted according to the brightness value of the human face and/or the brightness value of the background.

In the embodiment of the present invention, the mobile terminal judges whether it is necessary to adjust the exposure of the photographed person based on the obtained face brightness value and/or the background brightness value, and if it is judged that it is necessary to adjust the If the exposure of the person is determined, the mobile terminal adjusts the exposure of the person to be photographed, and if it is determined that the exposure of the person to be photographed does not need to be adjusted, the mobile terminal does not adjust the exposure of the person to be photographed. If it is determined that the exposure of the photographed person needs to be adjusted, go to step S307; otherwise, end this process.

Specifically, the manner in which the mobile terminal determines whether it is necessary to adjust the exposure of the photographed person may be: determining whether the brightness value of the human face is less than a preset brightness threshold. If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted; if it is determined that the brightness value of the human face is greater than or equal to the preset brightness threshold , the result of the judgment is that it is not necessary to adjust the exposure of the photographed person. The manner in which the mobile terminal determines whether it is necessary to adjust the exposure of the photographed person may also be: determining whether the brightness value of the human face is smaller than the brightness value of the background. If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the person to be photographed needs to be adjusted; if it is determined that the brightness value of the human face is greater than or equal to the brightness value of the background, then The result of the judgment is that there is no need to adjust the exposure of the photographed person. However, it can be understood that the above-mentioned judging methods of judging whether to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background are just two of them, and are not intended to limit the present invention. For example, it is also possible to judge whether the exposure of the subject needs to be adjusted under the current photographing environment through the clarity of the image in the shooting preview screen. If the clarity of the image is not high, the result of the judgment is that the subject needs to be adjusted. the exposure amount; if the definition of the image is high, it is judged that the exposure amount of the photographed person does not need to be adjusted.

S307. Output prompt information to prompt the user to adjust the face brightness value and/or background brightness value of the photographed person.

In the embodiment of the present invention, if the mobile terminal determines that the exposure of the person to be photographed needs to be adjusted, the mobile terminal outputs prompt information in the shooting preview screen to prompt the user to adjust the exposure in the shooting preview screen. Adjusting the face brightness value and/or background brightness value of the photographed person. Specifically, the display method of the prompt information may be a slide bar display method, a text prompt method, or a combination of a slide bar and a file display method, which is not specifically limited in this embodiment of the present invention. Wherein, the slider bar can be adjusted for brightness, and the user can select an area in the shooting preview screen, and the area selected by the frame selection is the area that needs to adjust the brightness value. The slider bar can be used to adjust the brightness of the area independently, and the display mode of the frame selection can be any geometric figure. For example, when a user takes a selfie and the mobile terminal detects that the exposure of the person to be photographed needs to be adjusted, the mobile terminal displays the slide bar in the shooting preview screen. If the user wants to highlight the person in the selfie Face, you can select the face area by means of a rectangular frame, and slide the slider to highlight the face area. Specifically, as shown in FIG. 4 , it is a schematic diagram of the interface of the shooting preview screen provided by the embodiment of the present invention, wherein the rectangular frame marked 401 indicates that the brightness of the background area can be adjusted, the mark 403 is the slider, and the mark 405 is the face area, after the mobile terminal receives the user’s photographing instruction, it detects that the brightness value of the face is lower than the background brightness value, in order to avoid taking an overexposed image, the mobile terminal outputs a text prompt message to prompt the user To adjust the brightness, the user slides the slider to lower the brightness of the background area of 401, which can highlight the brightness of the face and ignore the brightness of the background, so as to avoid overexposure of the image, and the user can adjust the brightness of the face as needed Brightness value and background brightness value to meet the needs of different users. This method is more suitable for selfies in scenic spots and is very practical. It should be noted that, in the embodiment of the present invention, the prompt information is output after the mobile terminal receives the photographing instruction and determines that the exposure needs to be adjusted. In some other executable solutions, the user triggers the photographing Before the instruction, in the shooting preview screen, the face brightness value and the background brightness value can also be adjusted independently, so as to achieve different shooting effects, so as to meet the shooting needs of different users.

S309, receiving a setting instruction from the user, increasing the brightness value of the face of the person to be photographed according to the setting instruction, and reducing the brightness value of the background to increase the exposure of the person to be photographed.

In the embodiment of the present invention, the mobile terminal receives the setting instruction input by the user in the shooting preview screen, increases the face brightness value according to the setting instruction, and lowers the background brightness value to improve the shooting. Exposure of the character. Specifically, if the prompting method is a sliding bar method, the setting instruction is a sliding instruction for the sliding bar, and the mobile terminal adjusts the height of the person to be photographed according to the extent to which the user slides the sliding bar. The brightness value of the human face, the brightness value of the background is lowered to increase the exposure of the person being photographed. The embodiment of the present invention is described by increasing the brightness value of the face of the photographed person and lowering the brightness value of the background to increase the exposure of the photographed person as an example. In some other executable solutions, the The mobile terminal may also lower the brightness value of the face of the photographed person according to the setting instruction of the user, and increase the brightness value of the background to reduce the exposure of the photographed person. In order to meet the shooting needs of different users.

S311. Shoot the person to be photographed according to the adjusted exposure of the person to be photographed.

In the embodiment of the present invention, when the mobile terminal adjusts the face brightness value and/or background brightness value of the photographed person, thereby adjusting the exposure of the photographed person, the adjusted The exposure amount is used to shoot the person to be photographed, so that the quality of the photographed image is better.

The method of the embodiment of the present invention has been described in detail above. In order to facilitate better implementation of the above-mentioned solution of the embodiment of the present invention, correspondingly, the following also provides related terminals for cooperating with implementing the above-mentioned solution.

Please refer to FIG. 5, which is a schematic structural diagram of the first embodiment of the mobile terminal provided by the embodiment of the present invention. The mobile terminal 50 includes: a receiving module 501, an acquiring module 503, a judging module 505, an adjusting module 507, and a photographing module 509, wherein,

The receiving module 501 is configured to receive a photographing instruction triggered by a user.

The obtaining module 503 is configured to obtain, according to the photographing instruction, the face brightness value and the background brightness value of the person to be photographed presented in the shooting preview screen.

Further, if there are at least two photographed persons in the photographing preview screen, the obtaining module 503 is specifically configured to obtain the photographed photograph of the photographed persons with the largest face area among the at least two photographed persons according to the photographing instruction. The face brightness value and the background brightness value.

A judging module 505, configured to judge whether it is necessary to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background.

Further, the judging module 505 is specifically used to judge whether the brightness value of the human face is smaller than a preset brightness threshold;

If it is determined that the luminance value of the human face is smaller than the preset luminance threshold, the result of the determination is that the exposure of the photographed person needs to be adjusted.

Furthermore, the judging module 505 is specifically configured to judge whether the face brightness value is smaller than the background brightness value;

If it is determined that the luminance value of the human face is smaller than the luminance value of the background, the result of the determination is that the exposure of the photographed person needs to be adjusted.

The adjustment module 507 is configured to adjust the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed if it is determined that the exposure of the person to be photographed needs to be adjusted.

Further, the adjustment module 507 is specifically configured to, if it is determined that the exposure of the photographed person needs to be adjusted, increase the brightness value of the face of the photographed person to increase the exposure of the photographed person.

Furthermore, the adjustment module 507 is specifically configured to, if it is determined that the exposure of the person to be photographed needs to be adjusted, increase the face brightness value of the person to be photographed, and lower the background brightness value to increase the exposure of the person to be photographed. exposure.

The photographing module 509 is configured to photograph the subject according to the adjusted exposure of the subject.

It can be understood that the functions of each functional unit of the mobile terminal 50 in this embodiment can be specifically implemented according to the method in the above-mentioned method embodiment in FIG. 1 or FIG. 2 , and details are not repeated here.

Further, please refer to FIG. 6 , which is a schematic structural diagram of an adjustment module 507 of a mobile terminal provided by an embodiment of the present invention. The adjustment module 507 includes: an output unit 5071 and a receiving unit 5073, wherein,

The output unit 5071 is configured to output prompt information to prompt the user to adjust the face brightness value and/or background brightness value of the photographed person.

The receiving unit 5073 is configured to receive a setting instruction from the user, and according to the setting instruction, increase the brightness value of the face of the subject to be photographed, and decrease the brightness value of the background to increase the exposure of the subject to be photographed.

It can be understood that the functions of the functional units of the adjustment module 507 in this embodiment can be specifically implemented according to the method in the method embodiment in FIG. 3 , which will not be repeated here.

Please refer to FIG. 7 , which is a schematic structural diagram of the second embodiment of the mobile terminal provided by the present invention. Wherein, as shown in FIG. 7 , the mobile terminal 70 may include: at least one processor 701 , such as a CPU, at least one bus 702 , at least one input device 703 and at least one output device 704 , and a memory 705 . Among them, the bus 702 is used to realize the communication connection between these components; the input device 703 can specifically be a touch panel of the terminal, including a touch screen and a touch screen, and is used to detect operation instructions on the touch panel of the terminal; the output device 704 can Including the display screen (Display) of the terminal, for outputting and displaying images or data; the memory 705 can be a high-speed RAM display, or a non-volatile memory, such as at least one disk display, and the memory 705 is optional It may also be at least one display device located away from the aforementioned processor 701 . As shown in FIG. 7 , the memory 705 as a computer display medium may include an operating system, a network communication module, a user interface module, and a camera program.

In the mobile terminal 70 shown in FIG. 7, the processor 701 can be used to run the camera program stored in the memory 705, and perform the following operations:

receiving a photographing instruction triggered by the user through the input device 703;

Obtaining the face brightness value and background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction;

judging whether it is necessary to adjust the exposure of the photographed person according to the face brightness value and/or the background brightness value;

If it is determined that the exposure of the person to be photographed needs to be adjusted, adjusting the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed;

The person to be photographed is photographed according to the adjusted exposure of the person to be photographed.

Further, the processor 701 executes the step of judging whether it is necessary to adjust the exposure of the photographed person according to the brightness value of the face and/or the brightness value of the background as follows:

judging whether the face brightness value is less than a preset brightness threshold;

If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted;

The processor 701 executes the step of adjusting the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person as follows:

The brightness value of the face of the photographed person is increased to increase the exposure of the photographed person.

Furthermore, the processor 701 executes the step of judging whether it is necessary to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background specifically as follows: judging whether the brightness value of the human face is less than the background brightness value;

If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the photographed person needs to be adjusted;

The processor 701 executes the step of adjusting the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person as follows:

Increase the brightness value of the face of the person to be photographed, and reduce the brightness value of the background to increase the exposure of the person to be photographed.

Furthermore, the step of processor 701 executing the step of adjusting the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person specifically includes:

Outputting prompt information to prompt the user to adjust the face brightness value and/or background brightness value of the photographed person;

receiving a setting instruction from the user, increasing the brightness value of the face of the person to be photographed according to the setting instruction, and reducing the brightness value of the background to increase the exposure of the person to be photographed.

Furthermore, the shooting person in the shooting preview screen includes at least two, and the processor 701 executes the step of acquiring the face brightness value and background brightness value of the shooting person presented in the shooting preview screen according to the shooting instruction. Specifically:

Acquiring the face brightness value and the background brightness value of the person to be photographed with the largest face area among the at least two persons to be photographed according to the photographing instruction.

It can be understood that, for specific execution steps of the processor 701, reference may be made to the content described in the embodiment in FIG. 1 or FIG. 2 or FIG. 3 , and details are not repeated here.

It should be noted that the above-mentioned mobile terminals may include, but are not limited to: smart phones (such as Android phones, iOS phones, etc.), mobile Internet devices (MID, Mobile Internet Devices) or wearable smart devices and other mobile devices with a camera function.

To sum up, by implementing the embodiment of the present invention, the mobile terminal obtains the face brightness value and the background brightness value of the photographed person in the shooting preview screen, and if it detects that the face brightness value is lower than the preset brightness threshold value, the brightness value is increased. The brightness value of the human face, or if it is detected that the brightness value of the human face is lower than the brightness value of the background, the brightness value of the human face is increased, and the brightness value of the background is lowered, so as to improve the brightness of the person being photographed. exposure. And the user can make independent settings, adjust the face brightness value and the background brightness value of the photographed person, and finally the mobile terminal shoots the photographed person according to the adjusted exposure of the photographed person, so that the exposure of the photographed person can be adjusted, and the photographed Relatively good quality images.

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 a computer-readable storage medium. 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) and the like.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.

Claims (8)

1. A mobile terminal photographing method, characterized in that, comprising: Receive the camera instruction triggered by the user; Obtaining the face brightness value and background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction; judging whether it is necessary to adjust the exposure of the photographed person according to the face brightness value and/or the background brightness value; If it is determined that the exposure of the person to be photographed needs to be adjusted, adjusting the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed, including: outputting prompt information to prompt the The user adjusts the face brightness value and/or background brightness value of the person being photographed; wherein, the display mode of the prompt information includes a slide bar display mode, and the slide bar is used for brightness adjustment; The photographed person in the screen performs frame selection of the area, determines that the area selected by the frame selection is the area where the brightness value of the photographed person needs to be adjusted, and adjusts the brightness of the selected area in response to the sliding instruction of the user sliding the slide bar. Adjusting the exposure of the person being photographed; The person to be photographed is photographed according to the adjusted exposure of the person to be photographed. 2. The method according to claim 1, wherein the judging whether to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background comprises: judging whether the face brightness value is less than a preset brightness threshold; If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted; The adjustment of the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person includes: The brightness value of the face of the photographed person is increased to increase the exposure of the photographed person. 3. The method according to claim 1, wherein the judging whether to adjust the exposure of the photographed person according to the face brightness value and/or the background brightness value comprises: judging whether the face brightness value is smaller than the background brightness value; If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the photographed person needs to be adjusted; The adjustment of the face brightness value and/or background brightness value of the photographed person to adjust the exposure of the photographed person includes: Increase the brightness value of the face of the person to be photographed, and reduce the brightness value of the background to increase the exposure of the person to be photographed. 4. The method according to claim 1, wherein the shooting person in the shooting preview screen includes at least two people, and the brightness of the face of the shooting person presented in the shooting preview screen is obtained according to the shooting instruction. values and background brightness values, including: Acquiring the face brightness value and the background brightness value of the person to be photographed with the largest face area among the at least two persons to be photographed according to the photographing instruction. 5. A mobile terminal, characterized in that, comprising: A receiving module, configured to receive a photographing instruction triggered by a user; An acquisition module, configured to acquire the face brightness value and the background brightness value of the photographed person presented in the shooting preview screen according to the photographing instruction; A judging module, configured to judge whether it is necessary to adjust the exposure of the photographed person according to the brightness value of the human face and/or the brightness value of the background; An adjustment module, configured to adjust the face brightness value and/or background brightness value of the person to be photographed to adjust the exposure of the person to be photographed if it is determined that the exposure of the person to be photographed needs to be adjusted, wherein the adjustment The module includes an output unit and a receiving unit, the output unit is used to output prompt information to prompt the user to adjust the face brightness value and/or background brightness value of the person being photographed, wherein the display method of the prompt information includes The slide bar display mode, the slide bar is used to adjust the brightness; the receiving unit is used to respond to the user’s frame selection of the shooting person in the shooting preview screen, and determine the area selected by the frame selection as the shooting An area where the brightness value of the person needs to be adjusted, and adjusting the exposure of the person to be photographed by adjusting the brightness of the selected area in response to the sliding instruction of the user sliding the slide bar; The photographing module is configured to photograph the photographed person according to the adjusted exposure of the photographed person. 6. The mobile terminal according to claim 5, wherein the judging module is specifically used to judge whether the face brightness value is less than a preset brightness threshold; If it is determined that the brightness value of the human face is less than the preset brightness threshold, the result of the judgment is that the exposure of the photographed person needs to be adjusted; The adjustment module is specifically configured to increase the face brightness value of the photographed person to increase the exposure of the photographed person if it is determined that the exposure of the photographed person needs to be adjusted. 7. The mobile terminal according to claim 5, wherein the judging module is specifically used to judge whether the face brightness value is smaller than the background brightness value; If it is determined that the brightness value of the human face is smaller than the brightness value of the background, the result of the judgment is that the exposure of the photographed person needs to be adjusted; The adjustment module is specifically configured to increase the brightness value of the face of the person to be photographed and lower the brightness value of the background to increase the exposure of the person to be photographed if it is determined that the exposure of the person to be photographed needs to be adjusted. 8. The mobile terminal according to claim 5, wherein the shooting person in the shooting preview screen includes at least two people, and the acquiring module is specifically configured to acquire the at least two shooting characters according to the shooting instruction. The face brightness value and the background brightness value of the person with the largest face area among the characters are captured.