WO2019129041A1 - 一种亮度调节方法、装置、终端及计算机可读存储介质 - Google Patents

一种亮度调节方法、装置、终端及计算机可读存储介质 Download PDF

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Publication number
WO2019129041A1
WO2019129041A1 PCT/CN2018/123842 CN2018123842W WO2019129041A1 WO 2019129041 A1 WO2019129041 A1 WO 2019129041A1 CN 2018123842 W CN2018123842 W CN 2018123842W WO 2019129041 A1 WO2019129041 A1 WO 2019129041A1
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WO
WIPO (PCT)
Prior art keywords
background
area
brightness
shooting
brightness value
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PCT/CN2018/123842
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English (en)
French (fr)
Inventor
王瑞东
丁吉琼
Original Assignee
深圳传音控股股份有限公司
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Publication of WO2019129041A1 publication Critical patent/WO2019129041A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/11—Region-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/30—Determination of transform parameters for the alignment of images, i.e. image registration
    • G06T7/33—Determination of transform parameters for the alignment of images, i.e. image registration using feature-based methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/61—Control of cameras or camera modules based on recognised objects
    • H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/71—Circuitry for evaluating the brightness variation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof

Definitions

  • the present invention relates to the field of computer technologies, and in particular, to a brightness adjustment method, apparatus, terminal, and computer readable storage medium.
  • Embodiments of the present invention provide a brightness adjustment method, apparatus, terminal, and computer readable storage medium, which can be adjusted for brightness of different shooting areas in a shooting scene.
  • an embodiment of the present invention provides a brightness adjustment method, where the method includes:
  • the background low-light area is a shooting background area having a brightness value smaller than a first threshold
  • the background highlight area is a shooting background area having a brightness value greater than a second threshold
  • the first threshold is smaller than the second threshold
  • the brightness adjustment method further includes:
  • the brightness of the subject is adjusted until the subject's brightness value is within the subject's target brightness value range.
  • the brightness adjustment method further includes:
  • the subject is divided into a main body highlight area, a main body low light area, and a main body normal brightness area according to different brightness values;
  • the main body low-light area is a photographing main body area having a brightness value smaller than a third threshold value
  • the main body highlighting area is a photographing main body area having a brightness value greater than a fourth threshold value
  • the third threshold value is smaller than a fourth threshold value
  • the brightness of the highlight area of the main body and the low light area of the main body are respectively adjusted, including:
  • the brightness of the highlight area of the main body is adjusted until the brightness value of the main body highlight area is within the target brightness value range of the main body highlight area;
  • the brightness of the low-light area of the main body is adjusted until the brightness value of the low-light area of the main body is within the target brightness value range of the main low-light area;
  • adjust the brightness of the background highlight area and the background highlight area separately including:
  • the subject in the shooting scene is identified, including:
  • the feature is compared with the subject feature of the preset stock to determine the subject.
  • the brightness adjusting method before obtaining different brightness values of the shooting background other than the shooting body in the shooting scene, the brightness adjusting method further includes:
  • the step of acquiring different brightness values of the shooting background other than the subject in the shooting scene is performed.
  • an embodiment of the present invention provides a brightness adjustment device, the device comprising:
  • a recognition unit configured to identify a shooting subject in a shooting scene
  • a dividing unit configured to divide the shooting background into a background highlighting area, a background lowlighting area, and a background normal brightness area according to different brightness values
  • the adjusting unit is configured to respectively adjust the brightness of the background highlight area and the background low light area.
  • the background low-light area is a shooting background area having a brightness value smaller than a first threshold
  • the background highlight area is a shooting background area having a brightness value greater than a second threshold
  • the first threshold is smaller than the second threshold
  • the obtaining unit is further configured to acquire a brightness value of the shooting body; the adjusting unit is further configured to adjust the brightness of the shooting body until the brightness value of the shooting body is in the shooting when the brightness value of the shooting body is not within the target brightness value range of the shooting body.
  • the target target brightness value range is further configured to adjust the brightness of the shooting body until the brightness value of the shooting body is in the shooting when the brightness value of the shooting body is not within the target brightness value range of the shooting body.
  • the acquiring unit is further configured to obtain different brightness values of the shooting body, and the dividing unit is further configured to divide the shooting body into a main body highlighting area, a main body low-lighting area, and a main body normal brightness area according to different brightness values;
  • the adjusting unit is further configured to respectively adjust the brightness of the main body highlight area and the main body low light area.
  • the main body low-light area is a photographing main body area having a brightness value smaller than a third threshold value
  • the main body highlighting area is a photographing main body area having a brightness value greater than a fourth threshold value
  • the third threshold value is smaller than a fourth threshold value.
  • the specific manner of the adjusting unit for separately adjusting the brightness of the main body highlight area and the main body low light area is:
  • the brightness of the highlight area of the main body is adjusted until the brightness value of the main body highlight area is within the target brightness value range of the main body highlight area;
  • the brightness of the low-light area of the main body is adjusted until the brightness value of the low-light area of the main body is within the target brightness value range of the main low-light area;
  • the specific manner of adjusting the brightness of the background highlighting area and the background low-light area by the adjusting unit is:
  • the brightness adjusting device further comprises: extracting feature points of the shooting body; comparing the features with the body features of the preset inventory, and determining the shooting body.
  • the brightness adjusting device further includes a determining unit, configured to determine whether to turn on the brightness adjusting function; if the method is turned on, the acquiring unit acquires a step of acquiring different brightness values of the shooting background other than the shooting body in the shooting scene.
  • a determining unit configured to determine whether to turn on the brightness adjusting function; if the method is turned on, the acquiring unit acquires a step of acquiring different brightness values of the shooting background other than the shooting body in the shooting scene.
  • an embodiment of the present invention provides a terminal, including a processor, an input device, an output device, and a memory, where the processor, the input device, the output device, and the memory are connected to each other, wherein the memory is used to store the support terminal to execute the foregoing method.
  • a computer program comprising program instructions, the processor being configured to invoke program instructions to perform the method of the first aspect above.
  • an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by the processor, the processor executes the first aspect.
  • the embodiment of the present invention After identifying the shooting subject in the shooting scene, acquires different brightness values of the shooting background other than the shooting subject in the shooting scene, and divides the shooting background into a background highlighting area and a background low-lighting area according to different brightness values. And the background normal brightness area, the terminal separately adjusts the brightness of the background highlight area to the background low-light area, and can adjust the brightness of different shooting areas in the shooting scene.
  • FIG. 1 is a schematic flow chart of a brightness adjustment method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of another brightness adjustment method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a brightness adjusting device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of a brightness adjustment method according to an embodiment of the present invention.
  • the brightness adjustment method shown in FIG. 1 may include the following steps:
  • the terminal recognizes a shooting subject in the shooting scene.
  • the terminal can be a professional camera, such as a digital camera, a SLR, etc., or a non-professional camera such as a mobile phone or a tablet computer with a camera function.
  • the subject can be a character or can be multiple characters.
  • the terminal or the terminal may call the photographing software in the terminal to align the shooting scene and identify the photographing subject in the shooting scene.
  • identifying the shooting subject in the shooting scene may include: extracting a feature point of the shooting body; comparing the feature with a body feature of the preset inventory to determine the shooting body.
  • the feasible way may be: the terminal recognizes the shooting subject in the shooting scene through the face recognition algorithm, for example, the terminal may first detect the face and locate the key feature points of the face, and crop the face area, and after the preprocessing, may join the face recognition.
  • the algorithm extracts the facial features and compares the extracted features with the known faces of the inventory to complete the recognition of the subject.
  • the above-mentioned face recognition algorithm is designed on a two-dimensional plane.
  • the terminal can also recognize the subject in the shooting scene by other face recognition algorithms, such as spatial analysis or partial hold projection, etc., this embodiment does not specifically limited.
  • the terminal acquires different brightness values of the shooting background other than the shooting body in the shooting scene.
  • the remaining part of the shooting scene except for the shooting subject may be collectively referred to as a shooting background, such as a shooting scene including a face, a tree, and a building, in which the face belongs to the subject, except for other parts of the face. , that is, trees and buildings are the background of the shooting.
  • a shooting background such as a shooting scene including a face, a tree, and a building, in which the face belongs to the subject, except for other parts of the face.
  • trees and buildings are the background of the shooting.
  • different shooting backgrounds may have different brightness values, or different parts of the same shooting background may have different brightness values. Therefore, the brightness value of the background captured in the shooting scene acquired by the terminal is at least one.
  • the terminal can use the light sensor built in the camera software of the terminal to obtain different brightness values of the shooting background, or the terminal can obtain different brightness values of the shooting background by other methods.
  • the terminal obtains whether the brightness adjustment function is enabled before the shooting background other than the shooting body in the shooting scene, and if it is turned on, the shooting background of the shooting scene other than the shooting body is acquired.
  • the step of different brightness values ensures that the terminal acquires different brightness values of the shooting background in the case where the terminal allows dynamic adjustment of the brightness in the shooting scene.
  • the terminal does not turn on the brightness adjustment function, that is, the terminal portion allows dynamic adjustment of the brightness in the shooting scene, the terminal does not perform the step of acquiring different brightness values of the shooting background, which can save terminal power consumption.
  • the background low-light area is a shooting background area having a brightness value smaller than a first threshold
  • the background highlight area is a shooting background area having a brightness value greater than a second threshold
  • the first threshold is smaller than the second threshold.
  • the first threshold and the second threshold may be luminance values preset by the terminal.
  • the terminal may divide the shooting background into a background highlighting area, a background highlighting area, and a background according to different brightness values and a preset preset background brightness dividing rule.
  • Normal brightness area wherein, the normal brightness area of the background is a normal exposure area, that is to say, the normal brightness area of the background is a normal area of brightness, and the terminal can shoot a better shooting effect in the area.
  • the shooting background brightness dividing rule may be preset by the terminal according to the first threshold and the second threshold. That is, the terminal may preset the first threshold and the second threshold, or the system may preset the first threshold and the second threshold, and then the terminal sets the brightness division rule according to the first threshold and the second threshold.
  • the shooting background preset brightness dividing rule may be: when the background brightness value is less than 40, the background is a low-light area, and when the shooting background brightness value is greater than 230, the background is The highlight area and the shooting background brightness value are between 40-230 as the background normal brightness area.
  • some possible shooting background brightness division rules may be listed, and the specific shooting background division rule is not limited.
  • the terminal preset brightness division rule may be that the shooting background area whose background brightness value is less than the first threshold, that is, 30, is the background low brightness area.
  • the shooting background area where the background brightness value is greater than the second threshold value 220 is the background highlight area; the shooting background area where the background brightness value is between 30-220 is the background normal bright area.
  • the terminal determines that the brightness values 50 and 110 of the shooting background fall at 30- Between 220, so the shooting background area where the brightness values 550 and 110 are located is the background normal brightness area; the terminal determines that the shooting background brightness value 25 is less than 30, so the shooting background area where the brightness value 25 is located is the background low-light area; the terminal can judge shooting The luminance values 226 and 240 of the background are greater than 220, so the shooting background area where the luminance values 226 and 240 are located is the background highlighting area.
  • the terminal separately adjusts the brightness of the background highlight area and the background low area.
  • adjusting the brightness of the background highlight area and the background low light area respectively includes: adjusting the brightness of the background highlight area until the background is highlighted when the brightness value of the background highlight area is not within the target brightness range of the background highlight area.
  • the brightness value of the area is within the target brightness value range of the background highlight area; when the brightness value of the background low light area is not within the target brightness value range of the background low light area, the brightness of the background low light area is adjusted until the brightness value of the background low light area Within the target brightness value range of the background low-light area;
  • the background highlight value range and the background highlight area target brightness value range may be preset by the terminal.
  • the terminal determines that the terminal obtains better when the brightness value of the background highlight area is within the target brightness range of the background highlight area and when the brightness value of the background low area is within the target brightness range of the background low-light area Shooting effect.
  • the range of the target highlight value range and the background low-light area target brightness value range may be a specific brightness value or a brightness value range in some cases. For example, it can be assumed that the target background highlight value of the terminal preset is 190, and the background highlight value of the background highlight area can be set to 185-195.
  • the brightness adjustment method further includes: acquiring a brightness value of the shooting body; adjusting the brightness of the shooting body until the brightness value of the shooting body is at the target brightness of the shooting body when the brightness value of the shooting body is not within the target brightness value range of the shooting body Within the range of values.
  • the target subject brightness value range may be preset by the terminal, or may be the system default.
  • the terminal may obtain the brightness value of the shooting body through a light sensor or other means in the terminal, and compare the brightness value of the shooting body with the target brightness value range of the preset body; if the brightness value of the shooting body is not within the target body brightness value range of the preset body Inside, the brightness of the subject is adjusted to ensure that the subject captured by the terminal is clear.
  • the terminal preset subject brightness range or the system default subject target brightness range may be different. In other words, the terminal preset subject target brightness value range varies depending on the subject.
  • the terminal may set the body target brightness value range to be higher for the dark skin color body; for the light skin color body, the terminal may set the body target brightness value range. Lower.
  • the camera captures different brightness values of the shooting background except the shooting subject, and divides the shooting background into a background highlighting area according to different brightness values, and the background is low.
  • the bright area and the background normal brightness area the terminal respectively adjusts the brightness of the background highlight area and the background low area, and can adjust the brightness of different shooting areas in the shooting scene.
  • FIG. 2 is a schematic flowchart of another brightness adjustment method according to an embodiment of the present invention.
  • the brightness adjustment method shown in FIG. 2 may include:
  • the terminal identifies a shooting subject in the shooting scene.
  • the terminal may first determine whether the brightness adjustment function is enabled in the terminal, so that the terminal determines whether to perform steps 203-205. If it is judged that the brightness adjustment function is enabled in the terminal, that is, the terminal allows the terminal to adjust the brightness of the subject in the shooting scene and the brightness of the shooting background in real time during shooting to ensure the quality of the captured picture and video, then the terminal Step 203 may be performed; if it is determined that the terminal does not turn on the brightness adjustment function, that is, the terminal does not allow the terminal to adjust the brightness of the shooting subject and the shooting background in the shooting scene in real time during the shooting, the terminal may not perform step 203 to save the terminal function. Cost.
  • the terminal acquires different brightness values of the shooting body and acquires different brightness values of the shooting background other than the shooting body in the shooting scene.
  • the background low-light area is a shooting background area having a brightness value smaller than a first threshold
  • the background highlight area is a shooting background area having a brightness value greater than a second threshold
  • the first threshold is smaller than the second threshold
  • the main body low-light area is a photographing body area having a brightness value smaller than a third threshold
  • the main body highlight area is a photographing body area having a brightness value greater than a fourth threshold
  • the third threshold is smaller than the fourth threshold.
  • the terminal can obtain different brightness values of the shooting body and obtain different brightness values of the shooting background through the light sensor built in the terminal shooting software, or the terminal can also obtain different brightness values by other means.
  • the terminal may set a shooting background brightness dividing rule according to the first threshold and the second threshold, and set a shooting body brightness dividing rule according to the third threshold and the fourth threshold. Further, the terminal may divide the shooting body into a plurality of different body regions according to different brightness values of the shooting body and the brightness division rules of the shooting body, and the terminal may divide the shooting according to different brightness values of the shooting background and shooting background brightness. Divided into multiple different background areas. Wherein, the main body highlighting area, the main body low-lighting area and the main body normal brightness area of the shooting body are at least one, and similarly, the background highlighting area, the background low-light area and the background normal brightness area included in the shooting background are at least one. .
  • the main normal brightness area and the background normal brightness area refer to an area that can be normally exposed, and the terminal can adjust the brightness of the two common brightness areas to ensure better shooting results, or the terminal may not be the same.
  • the brightness of the normal bright area is adjusted to save terminal power consumption.
  • the first threshold and the third threshold may be the same or different, and the second threshold and the fourth threshold may be the same or different, that is, the shooting subject brightness value dividing rule and the shooting background brightness value dividing rule may be the same or different. .
  • the terminal may preset the shooting subject brightness division rule to be: shooting subject brightness.
  • the main body area with a value greater than 240 is the main body highlight area; the main body area of the subject with a brightness value of 35-240 is the main normal brightness area; the main body area with the subject brightness value less than 35 is the main body low-light area.
  • the terminal can determine the subject with the brightness value of the subject of 30 and 25
  • the area is a low-light area of the main body
  • the main body area where the subject brightness value is 255 is the main body highlight area
  • the main body area where the subject brightness values are 45 and 190 is the main normal brightness area.
  • the terminal photographing body area includes two main body highlight areas, one main body highlight area, and two main body normal brightness areas. The above examples are just one possible scenario of this implementation.
  • the terminal may preset a background brightness range range and a background low-light area target brightness value range for the shooting background area, and then the terminal sets the brightness values of the plurality of background highlight areas and the background highlight area target.
  • the range of brightness values is compared, and the brightness values of the plurality of background low-light areas are compared to the range of the background low-light area target brightness values.
  • the terminal adjusts the brightness of the background highlight area until the brightness value of the background highlight area is within the target brightness range of the background highlight area; If the brightness value of the background low-light area is not within the target low-light area target brightness value range, the terminal adjusts the brightness of the background low-light area until the background low-light area brightness value is in the background low-light area target brightness value.
  • the target background brightness value range preset by the terminal is 190-195
  • the background low brightness area target brightness value range is 50-60
  • the brightness values of the two background highlight areas of the terminal can be respectively 220 and 180
  • the brightness values of the two background low-light areas may be 30 and 55
  • the terminal adjusts the brightness of the background highlight area with the brightness value of 220 to the brightness of the background highlight area according to the above adjustment method.
  • the value is within the background highlight area target range 190-195; the brightness of the background highlight area having the brightness value of 180 is increased until the brightness value of the background highlight area is within the background highlight value of the background highlight area.
  • the terminal separately adjusts the brightness of the background low-light area with the brightness value of 30 and the brightness value of 55 until the brightness value of each background low-light area is within the target low-light area target brightness value range.
  • the terminal may preset a shooting background comprehensive target brightness value range for the shooting background, and the terminal adjusts the brightness of the plurality of background highlight areas of the shooting background until the brightness values of the plurality of background highlight areas are integrated in the shooting background. Within the brightness value range, and the terminal adjusts the brightness of the plurality of background low-light areas of the shooting background until the brightness values of the plurality of background low-light areas are within the integrated target brightness value range.
  • the terminal has a preset background luminance target value range of 80-110 for the shooting background
  • the luminance value of a background high-luminance region acquired by the terminal may be 150
  • the brightness value may be 65
  • the terminal lowers the brightness of the background highlight area until the brightness value of the background highlight area is within the range of the background comprehensive target brightness value; the terminal adjusts the brightness of the background low-light area until the background low-light area
  • the brightness value is within the range of the integrated target brightness value.
  • the terminal may preset a target brightness value range of the main body highlight area and a target brightness value range of the main body highlight area for the photographing body, and then the terminal compares the brightness values of the plurality of main body highlight areas with the The target highlight range target brightness value range is compared, and the brightness values of the plurality of subject low-light areas are compared with the target low-light area target brightness value range.
  • the terminal adjusts the brightness of the highlight area of the main body until the brightness value of the highlight area of the main body is within the target brightness value range of the main body highlight area; Similarly, if the brightness value of the low-light area of the main body is not within the target brightness value range of the main low-light area, the terminal adjusts the brightness of the low-light area of the main body until the brightness value of the low-light area of the main body is in the target low-light area target brightness. Within the range of values.
  • the terminal may preset a comprehensive target brightness value range of the shooting subject for the shooting body, and the terminal lowers the brightness of the plurality of main body highlight areas of the shooting body until the brightness values of the plurality of main body highlight areas are integrated in the shooting body. Within the target brightness value range, and the terminal increases the brightness of the plurality of subject low-light areas of the subject until the brightness values of the plurality of subject low-light areas are within the integrated target brightness value range.
  • the shooting subject in the shooting scene is recognized, and different brightness values respectively of the shooting body and the shooting background are obtained, and the shooting body is divided into different shooting values by using different brightness values of the shooting body.
  • the main body highlighting area, the main body low brightness area and the main body ordinary brightness area, and using the different brightness values of the shooting background the shooting background is divided into a background highlighting area, a background low-light area and a background normal brightness area, and the terminal respectively adjusts the above shooting.
  • the brightness of different areas of the subject and the shooting background can be adjusted for the brightness of different shooting areas in the shooting scene to ensure the quality of the picture or video captured.
  • FIG. 3 is a schematic block diagram of a brightness adjustment apparatus according to an embodiment of the present invention.
  • the apparatus as described in FIG. 3 may include an identification unit 301, an acquisition unit 302, a division unit 303, and an adjustment unit 304.
  • the identification unit 301 is configured to identify a shooting subject in a shooting scene
  • the unit 302 is obtained. It is used to obtain different brightness values of the shooting background other than the shooting subject in the shooting scene;
  • a dividing unit 303 configured to divide the shooting background into a background highlighting area, a background lowlighting area, and a background normal brightness area according to different brightness values;
  • the adjusting unit 304 is configured to respectively adjust brightness of the background highlight area and the background low light area;
  • the background low-light area is a shooting background area having a brightness value smaller than a first threshold
  • the background highlight area is a shooting background area having a brightness value greater than a second threshold
  • the first threshold is smaller than the second threshold
  • the obtaining unit 302 is further configured to acquire a brightness value of the shooting body; the adjusting unit 304 is further configured to adjust the brightness of the shooting body until the brightness value of the shooting body is when the brightness value of the shooting body is not within the target brightness value range of the shooting body. Within the range of the subject's target brightness value.
  • the obtaining unit 302 is further configured to acquire different brightness values of the shooting body
  • the dividing unit 303 is further configured to divide the shooting body into a main body highlighting area, a main body low-lighting area, and a main body common brightness according to different brightness values.
  • the adjustment unit 304 is further configured to adjust the brightness of the main body highlight area and the main body low light area, respectively.
  • the main body low-light area is a photographing main body area having a brightness value smaller than a third threshold value
  • the main body highlighting area is a photographing main body area having a brightness value greater than a fourth threshold value
  • the third threshold value is smaller than a fourth threshold value.
  • the specific manner of the adjusting unit 304 for separately adjusting the brightness of the main body highlight area and the main body low light area is:
  • the brightness of the highlight area of the main body is adjusted until the brightness value of the main body highlight area is within the target brightness value range of the main body highlight area;
  • the brightness of the low-light area of the main body is adjusted until the brightness value of the low-light area of the main body is within the target brightness value range of the main low-light area;
  • the specific manner of the adjusting unit 304 for separately adjusting the brightness of the background highlight area and the background highlight area is:
  • the brightness adjusting device further comprises: extracting features of the shooting body; comparing the features with the body features of the preset inventory, and determining the shooting body.
  • the brightness adjusting device further includes a determining unit 305, configured to determine whether the brightness adjusting function is turned on; if turned on, the obtaining unit 302 acquires different brightness values of the shooting background other than the shooting body in the shooting scene.
  • a determining unit 305 configured to determine whether the brightness adjusting function is turned on; if turned on, the obtaining unit 302 acquires different brightness values of the shooting background other than the shooting body in the shooting scene.
  • the acquiring unit 302 acquires different brightness values of the shooting background except the shooting subject in the shooting scene, and the dividing unit 303 divides the shooting background into background according to different brightness values.
  • the highlighting area, the background low-light area and the background normal brightness area, the adjusting unit 304 respectively adjusts the brightness of the background highlight area and the background low-light area, and can adjust the brightness of different shooting areas in the shooting scene.
  • FIG. 4 is a schematic block diagram of a terminal according to an embodiment of the present invention.
  • the terminal in this embodiment as shown in FIG. 4 may include one or more processors 401, an input device 402, an output device 403, and a memory 404.
  • the above processor 401, input device 402, output device 403, and memory 404 are connected by a bus 405.
  • the memory 404 is used to store a computer program, the computer program includes program instructions, and the processor 401 is configured to execute program instructions stored in the memory 404.
  • the processor 401 is configured to invoke program instruction execution:
  • the background low-light area is a shooting background area having a brightness value smaller than a first threshold
  • the background highlight area is a shooting background area having a brightness value greater than a second threshold
  • the first threshold is smaller than the second threshold
  • the processor 401 is further configured to:
  • the brightness of the subject is adjusted until the brightness value of the subject is within the subject's target brightness value range.
  • the processor 401 is further configured to:
  • the subject is divided into a main body highlight area, a main body low light area, and a main body normal brightness area according to different brightness values;
  • the main body low-light area is a photographing main body area having a brightness value smaller than a third threshold value
  • the main body highlighting area is a photographing main body area having a brightness value greater than a fourth threshold value
  • the third threshold value is smaller than the fourth threshold value
  • the processor 401 is configured to perform, respectively, adjusting the brightness of the main body highlight area and the main body low light area by:
  • the brightness of the highlight area of the main body is adjusted until the brightness value of the main body highlight area is within the target brightness value range of the main body highlight area;
  • the brightness of the low-light area of the main body is adjusted until the brightness value of the low-light area of the main body is within the target brightness value range of the main low-light area;
  • the specific manner in which the processor 401 is configured to separately adjust the brightness of the background highlight area and the background highlight area is:
  • the processor 401 is specifically configured to perform:
  • the feature is compared with the subject feature of the preset stock to determine the subject.
  • the processor 401 is further configured to:
  • the step of acquiring different brightness values of the shooting background other than the subject in the shooting scene is performed.
  • the processor 401 may be a central processing unit (CPU), and the processor may also be another general-purpose processor, a digital signal processor (DSP). , Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 404 can include read only memory and random access memory and provides instructions and data to the processor 401.
  • a portion of memory 404 may also include non-volatile random access memory.
  • the memory 404 can also store information of the device type.
  • the processor 401 described in the embodiment of the present invention may implement the implementation manner described in FIG. 1 and FIG. 2 of the brightness adjustment method provided by the embodiment of the present invention, and may also perform the brightness described in the embodiment of the present invention.
  • the implementation of the adjustment device is not described here.
  • a computer readable storage medium stores a computer program.
  • the computer program includes program instructions.
  • the specific implementation may refer to the foregoing embodiments. The description of the content will not be repeated here.

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Abstract

本发明实施例公开了一种亮度调节方法、装置、终端及计算机可读存储介质，其中方法包括：识别拍摄场景中的拍摄主体，获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值，并根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域，分别调节背景高亮区域以及背景低亮区域的亮度。采用本发明实施例，可以针对拍摄场景中不同拍摄区域的亮度进行调节。

Description

一种亮度调节方法、装置、终端及计算机可读存储介质 技术领域
本发明涉及计算机技术领域，尤其涉及一种亮度调节方法、装置、终端及计算机可读存储介质。
背景技术
随着时代的发展和进步，拍摄照片不仅仅专业相机可以完成，目前的大部分智能手机也可以拍出相机水平的照片。在拍摄照片时，如果出现拍摄目标较暗，拍摄背景相对较亮的情况，智能手机或者专业相机等工具以拍摄目标为主体，调节拍摄亮度。如此一来，拍摄目标亮度能够达到理想拍摄亮度，但是会导致拍摄背景的亮度过亮，最终使得拍摄的照片的整体效果不好。例如，使用手机或者相机在背光场景下拍摄深肤色主体时，手机或者相机会以人脸亮度为依据，调节拍摄区域的亮度，在人脸亮度正常后，导致拍摄背景有些部分过分曝光。
发明内容
本发明实施例提供一种亮度调节方法、装置、终端及计算机可读存储介质，可以针对拍摄场景中不同拍摄区域的亮度进行调节。
第一方面，本发明实施例提供了一种亮度调节方法，该方法包括：
识别拍摄场景中的拍摄主体；
获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值；
根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域；
分别调节背景高亮区域以及背景低亮区域的亮度；
其中，背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，第一阈值小于第二阈值。
可选的，亮度调节方法还包括：
获取拍摄主体的亮度值；
当拍摄主体的亮度值不在拍摄主体目标亮度值范围内时，调节拍摄主体的 亮度直至拍摄主体的亮度值在拍摄主体目标亮度值范围内。
可选的，亮度调节方法还包括：
获取拍摄主体所具有的不同亮度值；
根据不同亮度值将拍摄主体划分为主体高亮区域、主体低亮区域以及主体普通亮度区域；
分别调节主体高亮区域以及主体低亮区域的亮度。
其中，主体低亮区域为具有的亮度值小于第三阈值的拍摄主体区域，主体高亮区域为具有的亮度值大于第四阈值的拍摄主体区域，第三阈值小于第四阈值。
可选的，分别调节主体高亮区域以及主体低亮区域的亮度，包括：
当主体高亮区域的亮度值不在主体高亮区域目标亮度值范围内时，调节主体高亮区域的亮度直至主体高亮区域的亮度值在主体高亮区域目标亮度值范围内；
当主体低亮区域的亮度值不在主体低亮区域目标亮度值范围内时，调节主体低亮区域的亮度直至主体低亮区域的亮度值在主体低亮区域目标亮度值范围内；
可选的，分别调节背景高亮区域以及背景低亮区域的亮度，包括：
当背景高亮区域的亮度值不在背景高亮区域目标亮度值范围内时，调节背景高亮区域的亮度直至背景高亮区域的亮度值在背景高亮区目标亮度值范围内；
当背景低亮区域的亮度值不在背景低亮区域目标亮度值范围内时，调节背景低亮区域的亮度直至背景低亮区域的亮度值在背景低亮区域目标亮度值范围内；
可选的，识别拍摄场景中的拍摄主体，包括：
提取拍摄主体的特征；
将特征与预设库存的主体特征比较，确定拍摄主体。
可选的，获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值之前，亮度调节方法还包括：
判断是否开启亮度调节功能；
若开启，则执行获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮 度值的步骤。
第二方面，本发明实施例提供了一种亮度调节装置，该装置包括：
识别单元，用于识别拍摄场景中的拍摄主体；
获取单元，获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值；
划分单元，用于根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域；
调节单元，用于分别调节背景高亮区域以及背景低亮区域的亮度。
其中，背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，第一阈值小于第二阈值。
可选的，获取单元还用于获取拍摄主体的亮度值；调节单元还用于当拍摄主体的亮度值不在拍摄主体目标亮度值范围内时，调节拍摄主体的亮度直至拍摄主体的亮度值在拍摄主体目标亮度值范围内。
可选的，获取单元，还用于获取拍摄主体所具有的不同亮度值，划分单元，还用于根据不同亮度值将拍摄主体划分为主体高亮区域、主体低亮区域以及主体普通亮度区域；调节单元，还用于分别调节主体高亮区域以及主体低亮区域的亮度。其中，主体低亮区域为具有的亮度值小于第三阈值的拍摄主体区域，主体高亮区域为具有的亮度值大于第四阈值的拍摄主体区域，第三阈值小于第四阈值。
可选的，调节单元用于分别调节主体高亮区域以及主体低亮区域的亮度的具体方式为：
当主体高亮区域的亮度值不在主体高亮区域目标亮度值范围内时，调节主体高亮区域的亮度直至主体高亮区域的亮度值在主体高亮区域目标亮度值范围内；
当主体低亮区域的亮度值不在主体低亮区域目标亮度值范围内时，调节主体低亮区域的亮度直至主体低亮区域的亮度值在主体低亮区域目标亮度值范围内；
可选的，调节单元用于分别调节背景高亮区域以及背景低亮区域的亮度的具体方式为：
当背景高亮区域的亮度值不在背景高亮区域目标亮度值范围内时，调节背景高亮区域的亮度直至背景高亮区域的亮度值在背景高亮区域目标亮度值范围内；
当背景低亮区域的亮度值不在背景低亮区域目标亮度值范围内时，调节背景低亮区域的亮度直至背景低亮区域的亮度值在背景低亮区域目标亮度值范围内；
可选的，亮度调节装置还包括：提取拍摄主体的特征点；将特征与预设库存的主体特征比较，确定拍摄主体。
可选的，亮度调节装置还包括判断单元，用于判断是否开启亮度调节功能；若开启，则获取单元获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值的步骤。
第三方面，本发明实施例提供了一种终端，包括处理器、输入设备、输出设备和存储器，处理器、输入设备、输出设备和存储器相互连接，其中，存储器用于存储支持终端执行上述方法的计算机程序，计算机程序包括程序指令，处理器被配置用于调用程序指令，执行上述第一方面的方法。
第四方面，本发明实施例提供了一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，计算机程序包括程序指令，程序指令当被处理器执行时使处理器执行上述第一方面的方法。
本发明实施例识别拍摄场景中的拍摄主体后，获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值，并根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域和背景普通亮度区域，终端分别调节背景高亮区域以背景低亮区域的亮度，可以针对拍摄场景中不同拍摄区域的亮度进行调节。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种亮度调节方法的示意流程图；
图2是本发明实施例提供的另一种亮度调节方法的示意流程图；
图3是本发明实施例提供的一种亮度调节装置的结构示意图；
图4是本发明实施例提供的一种终端的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参考图1，为本发明实施例提供的一种亮度调节方法的示意流程图。如图1所示的亮度调节方法，可包括以下步骤：
101、终端识别拍摄场景中的拍摄主体。
其中，终端可以为专业相机，如数码相机、单反等，也可以为带有拍照功能的手机、平板电脑等非专业相机。拍摄主体可以为一个人物，或者可以为多个人物。
具体的，终端或者终端可调用终端中的拍摄照片软件，使其对准拍摄场景，识别拍摄场景中的拍摄主体。可选的，识别拍摄场景中的拍摄主体可包括：提取拍摄主体的特征点；将特征与预设库存的主体特征比较，确定拍摄主体。可行的方式可以为：终端通过人脸识别算法识别拍摄场景中的拍摄主体，比如终端可以先检测到人脸并定位面部关键特征点，裁剪人脸区域，经过预处理之后，可加入人脸识别算法提取面部特征，并将所提取的特征与库存的已知人脸进行比对，完成拍摄主体的识别。上述的人脸识别算法设计在二维平面上，可选的，终端也可以通过其他人脸识别算法识别拍摄场景中的拍摄主体，比如空间分析法或者局部保持投影等，此实施例不做具体限定。
102、终端获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值。
可选的，拍摄场景中除去拍摄主体的剩余部分可统称为拍摄背景，比如一个拍摄场景中包括人脸、树木和建筑，在该拍摄场景中，人脸属于拍摄主体，除去人脸的其他部分，即树木和建筑都属于拍摄背景。在同一个拍摄场景中，不同的拍摄背景可能有不同的亮度值，或者相同的拍摄背景的不同部分也可能有不同的亮度值。因此，终端获取到的拍摄场景中拍摄背景的亮度值，至少为 一个。例如，可假设终端获取的拍摄背景的亮度值为30、50、220和225。可选的，终端可使用终端的拍照软件内置的光线感应器获取拍摄背景的不同亮度值，或者终端可以通过其他的方法获取拍摄背景的不同亮度值。
可选的，终端获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值之前，可判断是否开启亮度调节功能；若开启，再执行获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值的步骤，如此可以保证在终端允许对拍摄场景中的亮度进行动态调节的情况下，终端才获取拍摄背景所具有的不同亮度值。换句话说，如果终端没有开启亮度调节功能，也即终端部允许对拍摄场景中的亮度进行动态调节，则终端不执行获取拍摄背景所具有的不同亮度值步骤，可节省终端功耗。
103、根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域。
其中，背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，第一阈值小于第二阈值。第一阈值和第二阈值可以是终端预先设定的亮度值。
可选的，终端在获取拍摄场景中拍摄背景所具有的不同亮度值之后，可根据不同亮度值和终端预设拍摄背景亮度划分规则将拍摄背景划分为背景高亮区域、背景低亮区域和背景普通亮度区域。其中，背景普通亮度区域为正常曝光区域，也就是说背景普通亮度区域为亮度正常区域，在该区域终端能够拍出较好的拍摄效果。其中，拍摄背景亮度划分规则可以为终端根据第一阈值和第二阈值预先设定的。也就是说，终端可预先设定第一阈值和第二阈值，或者系统可预先设定第一阈值和第二阈值，然后终端按照该第一阈值和第二阈值设置亮度划分规则。假设终端可预设第一阈值为40，第二阈值为230，则拍摄背景预设亮度划分规则可以为：拍摄背景亮度值小于40时为背景低亮区域、拍摄背景亮度值大于230时为背景高亮区域、拍摄背景亮度值在40-230之间为背景普通亮度区域。本实施例可以列举一些可能的拍摄背景亮度划分规则，对于具体的拍摄背景划分规则不做限定。
举例来说，假设终端预先设定的第一阈值为30，第二阈值为220，则终端预设亮度划分规则可为拍摄背景亮度值小于第一阈值即30的拍摄背景区域为 背景低亮度区域；拍摄背景亮度值大于第二阈值即220的拍摄背景区域为背景高亮区域；拍摄背景亮度值在30-220之间的拍摄背景区域为背景普通亮区域。假设终端获取的拍摄背景所具有的不同亮度值分别为50、25、110、226和240，则根据上述终端预设拍摄背景亮度划分规则，终端判断拍摄背景的亮度值50和110落在30-220之间，所以亮度值550和110所在的拍摄背景区域为背景普通亮度区；终端判断拍摄背景亮度值25小于30，所以亮度值25所在的拍摄背景区域为背景低亮区域；终端可判断拍摄背景的亮度值226和240大于220，所以亮度值226和240所在的拍摄背景区域为背景高亮区域。
104、终端分别调节背景高亮区域以及背景低亮区域的亮度。
可选的，分别调节背景高亮区域以及背景低亮区域的亮度包括：当背景高亮区域的亮度值不在背景高亮区域目标亮度值范围内时，调节背景高亮区域的亮度直至背景高亮区域的亮度值在背景高亮区域目标亮度值范围内；当背景低亮区域的亮度值不在背景低亮区域目标亮度值范围内时，调节背景低亮区域的亮度直至背景低亮区域的亮度值在背景低亮区域目标亮度值范围内；
其中，背景高亮区域目标亮度值范围和背景低亮区域目标亮度值范围可以是终端预设设定的。终端确定当背景高亮区域的亮度值在该背景高亮区域目标亮度值范围内以及当背景低亮区域的亮度值在该背景低亮区域目标亮度值范围之内时，终端可获得较好的拍摄效果。可选的，上述背景高亮区域目标亮度值范围和背景低亮区域目标亮度值范围在某些情况下可以为具体的亮度值，也可以为亮度值范围。比如，可假设终端预设的背景高亮区域目标亮度值为190，也可以设置背景高亮区域目标亮度值范围为185-195。
可选的，该亮度调节方法还包括：获取拍摄主体的亮度值；当拍摄主体的亮度值不在拍摄主体目标亮度值范围内时，调节拍摄主体的亮度直至拍摄主体的亮度值在拍摄主体目标亮度值范围内。
其中，拍摄主体目标亮度值范围可以是终端预先设定的，也可以是系统默认的。具体的，终端可通过终端内的光线传感器或者其他方式获取拍摄主体亮度值，将该拍摄主体亮度值与预设主体目标亮度值范围比较；若该拍摄主体亮度值不在预设主体目标亮度值范围内，则对该拍摄主体亮度进行调节，以保证终端拍摄到的拍摄主体清晰。对于同一拍摄场景中的不同拍摄主体，终端预设 主体目标亮度范围或者系统默认的主体目标亮度范围可不相同，换句话说，终端预设主体目标亮度值范围因拍摄主体不同而不同。举例来说，在同一个拍摄场景中存在深肤色主体和浅肤色主体，则针对深肤色主体，终端可设置主体目标亮度值范围较高一点；针对浅肤色主体，终端可设置主体目标亮度值范围较低一点。
本发明实施例中终端识别拍摄场景中的拍摄主体后，获取拍摄场景中除去拍摄主体外的拍摄背景所具有的不同亮度值，并根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域和背景普通亮度区域，终端分别对上述背景高亮区域和背景低亮区域的亮度进行调节，可以针对拍摄场景中不同拍摄区域的亮度进行调节。
参见图2，是本发明实施例提供的另一种亮度调节方法的示意流程图，如图2所示的亮度调节方法可包括：
201、终端识别拍摄场景中的拍摄主体。
202、判断终端是否开启亮度调节功能。
可选的，在终端识别到拍摄场景中的拍摄主体之后，终端可先判断是否终端开启了亮度调节功能，以便于终端决定是否执行步骤203-205。若判断终端开启了亮度调节功能，也就是说，终端允许终端在拍摄时，对拍摄场景中拍摄主体的亮度以及拍摄背景的亮度进行实时调节，以保证拍摄出的图片以及视频的质量，则终端可执行步骤203；若判断终端没有开启亮度调节功能，也就是说终端不允许在拍摄时终端对拍摄场景中的拍摄主体和拍摄背景的亮度进行实时调节，则终端可不执行步骤203，节省终端功耗开销。
203、终端获取拍摄主体所具有的不同亮度值以及获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值。
204、根据拍摄主体的不同亮度值，将拍摄主体划分为主体高亮区域、主体低亮区域和主体普通亮度区域，以及根据拍摄背景的不同亮度值，将拍摄背景划分为背景高亮区域、背景低亮区域和背景普通亮度区域。
其中，背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，第一阈值小于第二阈值。主体低亮区域为具有的亮度值小于第三阈值的拍摄主体区域，主体高亮区 域为具有的亮度值大于第四阈值的拍摄主体区域，第三阈值小于第四阈值。
可选的，终端可通过终端拍摄软件内置的光线传感器获取拍摄主体所具有的不同亮度值以及获取拍摄背景所具有的不同亮度值，或者终端也可以通过其他方式获取不同亮度值。
可选的，终端可依据上述的第一阈值和第二阈值，设定拍摄背景亮度划分规则，依据第三阈值和第四阈值，设定拍摄主体亮度划分规则。进一步的，终端可根据拍摄主体的不同亮度值和拍摄主体亮度划分规则，将拍摄主体划分为多个不同主体区域，以及终端可根据拍摄背景的不同亮度值和拍摄背景亮度划分规则，将拍摄背景划分为多个不同背景区域。其中，拍摄主体包括的主体高亮区域、主体低亮区域和主体普通亮度区域均为至少一个，同理，拍摄背景包括的背景高亮区域、背景低亮区域和背景普通亮度区域均为至少一个。其中，主体普通亮度区域和背景普通亮度区域均指能够正常曝光的区域，终端可对上述两个普通亮度区域的亮度进行调节，以保证获得更好的拍摄效果，或者终端也可以不对上述两个普通亮区域的亮度进行调节，以节省终端功耗。上述中第一阈值和第三阈值可以相同，也可以不同，第二阈值和第四阈值可以相同，也可以不同，也即拍摄主体亮度值划分规则和拍摄背景亮度值划分规则可以相同也可以不同。
举例来说，假设终端设置的第三阈值可为35，第四阈值可为240，则进一步的，终端依据第三阈值和第四阈值，预先设定拍摄主体亮度划分规则可为：拍摄主体亮度值大于240的拍摄主体区域为主体高亮区域；拍摄主体亮度值为35-240之间的拍摄主体区域为主体普通亮度区域；拍摄主体亮度值小于35的拍摄主体区域为主体低亮区域。可假设终端通过光线传感器获得的拍摄主体多个不同亮度值分别为30、45、25、190、255，则根据上述拍摄主体亮度划分规则，终端可判断拍摄主体亮度值为30和25的拍摄主体区域为主体低亮区域，拍摄主体亮度值为255的拍摄主体区域为主体高亮区域，拍摄主体亮度值为45和190的拍摄主体区域为主体普通亮度区域。总的来说，上述例子中，终端拍摄主体区域包括两个主体低亮区域、一个主体高亮区域和两个主体普通亮度区域。以上的举例只是本实施的一种可能情况。
205、分别调节主体高亮区域和主体低亮区域的亮度，以及分别调节背景 高亮区域和背景低亮区域的亮度。
可选的，终端可为拍摄背景区域预先设定背景高亮区域目标亮度值范围和背景低亮区域目标亮度值范围，然后终端将多个背景高亮区域的亮度值与该背景高亮区域目标亮度值范围进行比较，以及将多个背景低亮区域的亮度值与该背景低亮区域目标亮度值范围进行比较。若背景高亮区域的亮度值不在该背景高亮区域目标亮度值范围内，则终端调节背景高亮区域的亮度直至该背景高亮区域的亮度值在背景高亮区域目标亮度值范围内；同理的，若背景低亮区域的亮度值不在该背景低亮区域目标亮度值范围内，则终端调节该背景低亮区域的亮度直至该背景低亮区域的亮度值在背景低亮区域目标亮度值范围内。
举例来说，假设终端预先设定的背景高亮区域目标亮度值范围为190-195，背景低亮区域目标亮度值范围为50-60，假设终端两个背景高亮区域的亮度值可分别为220和180，两个背景低亮区域的亮度值可为30和55，则终端根据上述的调节方法，将亮度值为220的背景高亮区域的亮度调小，直至该背景高亮区域的亮度值在背景高亮区域目标范围190-195内；将亮度值为180的背景高亮区域的亮度调大，直至该背景高亮区域的亮度值在背景高亮区域目标亮度值范围内。同理的，终端分别调节亮度值为30和亮度值为55的背景低亮区域的亮度直至每个背景低亮区域的亮度值在背景低亮区域目标亮度值范围之内。
可选的，终端可为拍摄背景预先设定一个拍摄背景综合目标亮度值范围，终端调节拍摄背景的多个背景高亮区域的亮度直至多个背景高亮区域的亮度值在该拍摄背景综合目标亮度值范围内，以及终端调节拍摄背景的多个背景低亮区域的亮度直至多个背景低亮区域的亮度值在该综合目标亮度值范围之内。
举例来说，假设终端为拍摄背景预先设定的拍摄背景综合目标亮度值范围为80-110，假设终端获取的一个背景高亮度区域的亮度值可为150，终端获取的一个背景低亮区域的亮度值可为65，则终端将背景高亮区域的亮度调低直至背景高亮区域的亮度值在拍摄背景综合目标亮度值范围内；终端调大背景低亮区域的亮度直至该背景低亮区域的亮度值在综合目标亮度值范围内。
与上述同理的，可选的，终端可为拍摄主体预先设定主体高亮区域目标亮度值范围和主体低亮区域目标亮度值范围，然后终端将多个主体高亮区域的亮度值与该主体高亮区域目标亮度值范围进行比较，以及将多个主体低亮区域的 亮度值与该主体低亮区域目标亮度值范围进行比较。若主体高亮区域的亮度值不在该拍摄主体高亮区域目标亮度值范围内，则终端调节主体高亮区域的亮度直至该主体高亮区域的亮度值在主体高亮区域目标亮度值范围内；同理的，若主体低亮区域的亮度值不在该主体低亮区域目标亮度值范围内，则终端调节该主体低亮区域的亮度直至该主体低亮区域的亮度值在主体低亮区域目标亮度值范围内。
可选的，终端可为拍摄主体预先设定一个拍摄主体综合目标亮度值范围，终端调低拍摄主体的多个主体高亮区域的亮度直至多个主体高亮区域的亮度值在该拍摄主体综合目标亮度值范围内，以及终端调高拍摄主体的多个主体低亮区域的亮度直至多个主体低亮区域的亮度值在该综合目标亮度值范围内。
本发明实施例在终端开启亮度调节功能的情况下，识别拍摄场景中的拍摄主体，并获取拍摄主体和拍摄背景分别所具有的不同亮度值，利用拍摄主体的不同亮度值，将拍摄主体划分为主体高亮区域、主体低亮度域和主体普通亮度区域，以及利用拍摄背景的不同亮度值，将拍摄背景划分为背景高亮区域、背景低亮区域和背景普通亮度区域，并终端分别调节上述拍摄主体和拍摄背景不同区域的亮度，可以针对拍摄场景中不同拍摄区域的亮度进行调节，保证拍摄得到的图片或者视频质量。
参见图3，是本发明实施例提供的一种亮度调节装置的示意性框图。如图3所述的装置可包括：识别单元301、获取单元302，划分单元303以及调节单元304。
识别单元301，用于识别拍摄场景中的拍摄主体；
获取单元302。用于获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值；
划分单元303，用于根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域；
调节单元304，用于分别调节背景高亮区域以及背景低亮区域的亮度；
其中，背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，第一阈值小于第二阈值。
可选的，获取单元302还用于获取拍摄主体的亮度值；调节单元304还用于当拍摄主体的亮度值不在拍摄主体目标亮度值范围内时，调节拍摄主体的亮度直至拍摄主体的亮度值在拍摄主体目标亮度值范围内。
可选的，获取单元302，还用于获取拍摄主体所具有的不同亮度值，划分单元303，还用于根据不同亮度值将拍摄主体划分为主体高亮区域、主体低亮区域以及主体普通亮度区域；调节单元304，还用于分别调节主体高亮区域和主体低亮区域的亮度。其中，主体低亮区域为具有的亮度值小于第三阈值的拍摄主体区域，主体高亮区域为具有的亮度值大于第四阈值的拍摄主体区域，第三阈值小于第四阈值。
可选的，调节单元304用于分别调节主体高亮区域和主体低亮区域的亮度的具体方式为：
当主体高亮区域的亮度值不在主体高亮区域目标亮度值范围内时，调节主体高亮区域的亮度直至主体高亮区域的亮度值在主体高亮区域目标亮度值范围内；
当主体低亮区域的亮度值不在主体低亮区域目标亮度值范围内时，调节主体低亮区域的亮度直至主体低亮区域的亮度值在主体低亮区域目标亮度值范围内；
可选的，调节单元304用于分别调节背景高亮区域以及背景低亮区域的亮度的具体方式为：
当背景高亮区域的亮度值不在背景高亮区域目标亮度值范围内时，调节背景高亮区域的亮度直至背景高亮区域的亮度值在背景高亮区域目标亮度值范围内；
当背景低亮区域的亮度值不在背景低亮区域目标亮度值范围内时，调节背景低亮区域的亮度直至背景低亮区域的亮度值在背景低亮区域目标亮度值范围内；
可选的，亮度调节装置还包括：提取拍摄主体的特征；将特征与预设库存的主体特征比较，确定拍摄主体。
可选的，亮度调节装置还包括判断单元305，用于判断是否开启亮度调节功能；若开启，则获取单元302获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值。
本发明实施例识别单元301识别拍摄场景中的拍摄主体后，获取单元302获取拍摄场景中除去拍摄主体外的拍摄背景所具有的不同亮度值，划分单元303根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域和背景普通亮度区域，调节单元304分别对背景高亮区域和背景低亮区域的亮度进行调节，可以针对拍摄场景中不同拍摄区域的亮度进行调节。
参见图4，是本发明实施例提供的一种终端示意框图。如图4所示的本实施例中的终端可以包括：一个或多个处理器401、输入设备402、输出设备403和存储器404。上述处理器401、输入设备402、输出设备403和存储器404通过总线405连接。存储器404用于存储计算机程序，计算机程序包括程序指令，处理器401用于执行存储器404存储的程序指令。其中，处理器401被配置用于调用程序指令执行：
识别拍摄场景中的拍摄主体；
获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值；
根据不同亮度值将拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域；
分别调节背景高亮区域以及背景低亮区域的亮度；
其中，背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，第一阈值小于第二阈值。
可选的，处理器401还用于执行：
获取拍摄主体的亮度值；
当拍摄主体的亮度值不在拍摄主体目标亮度值范围内时，调节拍摄主体的亮度直至拍摄主体的亮度值在拍摄主体目标亮度值范围内。
可选的，处理器401还用于执行：
获取拍摄主体所具有的不同亮度值；
根据不同亮度值将拍摄主体划分为主体高亮区域、主体低亮区域以及主体普通亮度区域；
分别调节主体高亮区域和主体低亮区域的亮度。
其中，主体低亮区域为具有的亮度值小于第三阈值的拍摄主体区域，主体高亮区域为具有的亮度值大于第四阈值的拍摄主体区域，第三阈值小于第四阈 值。
可选的，处理器401用于执行分别调节主体高亮区域以及主体低亮区域的亮度具体方式为：
当主体高亮区域的亮度值不在主体高亮区域目标亮度值范围内时，调节主体高亮区域的亮度直至主体高亮区域的亮度值在主体高亮区域目标亮度值范围内；
当主体低亮区域的亮度值不在主体低亮区域目标亮度值范围内时，调节主体低亮区域的亮度直至主体低亮区域的亮度值在主体低亮区域目标亮度值范围内；
可选的，处理器401用于执行分别调节背景高亮区域以及背景低亮区域的亮度的具体方式为：
当背景高亮区域的亮度值不在背景高亮区域目标亮度值范围内时，调节背景高亮区域的亮度直至背景高亮区域的亮度值在背景高亮区域目标亮度值范围内；
当背景低亮区域的亮度值不在背景低亮区域目标亮度值范围内时，调节背景低亮区域的亮度直至背景低亮区域的亮度值在背景低亮区域目标亮度值范围内；
可选的，处理器401具体用于执行：
提取拍摄主体的特征；
将特征与预设库存的主体特征比较，确定拍摄主体。
可选的，处理器401还用于执行：
判断是否开启亮度调节功能；
若开启，则执行获取拍摄场景中除拍摄主体外的拍摄背景所具有的不同亮度值的步骤。
应当理解，在本发明实施例中，所称处理器401可以是中央处理单元(Central Processing Unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field-Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器404可以包括只读存储器和随机存取存储器，并向处理器401提供指令和数据。存储器404的一部分还可以包括非易失性随机存取存储器。例如，存储器404还可以存储设备类型的信息。
具体实现中，本发明实施例中所描述的处理器401可执行本发明实施例提供的亮度调节方法的图1和图2中所描述的实现方式，也可执行本发明实施例所描述的亮度调节装置实现方式，在此不再赘述。
在本发明的实施例中提供一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，计算机程序包括程序指令，程序指令被处理器执行时的具体实现可参考上述各个实施例中相关内容的描述，在此不再赘述。
以上，仅为本发明的部分实施方式，但本发明的保护范围并不局限于此，在上述实施例的基础上想到的各种等效的修改或替换，都应涵盖在本发明的保护范围之内。

Claims (10)

  1. 一种亮度调节方法，其特征在于，包括：
    识别拍摄场景中的拍摄主体；
    获取所述拍摄场景中除所述拍摄主体外的拍摄背景所具有的不同亮度值；
    根据所述不同亮度值将所述拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域；
    分别调节所述背景高亮区域以及所述背景低亮区域的亮度；
    其中，所述背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，所述背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，所述第一阈值小于所述第二阈值。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    获取所述拍摄主体的亮度值；
    当所述拍摄主体的亮度值不在所述拍摄主体目标亮度值范围内时，调节所述拍摄主体的亮度直至所述拍摄主体的亮度值在所述拍摄主体目标亮度值范围内。
  3. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    获取所述拍摄主体所具有的不同亮度值；
    根据所述不同亮度值将所述拍摄主体划分为主体高亮区域、主体低亮区域以及主体普通亮度区域；
    分别调节所述主体高亮区域以及所述主体低亮区域的亮度；
    其中，所述主体低亮区域为具有的亮度值小于第三阈值的拍摄主体区域，所述主体高亮区域为具有的亮度值大于第四阈值的拍摄主体区域，所述第三阈值小于所述第四阈值。
  4. 根据权利要求3所述的方法，其特征在于，所述分别调节所述主体高亮区域以及所述主体低亮区域的亮度，包括：
    当所述主体高亮区域的亮度值不在所述主体高亮区域目标亮度值范围内 时，调节所述主体高亮区域的亮度直至所述主体高亮区域的亮度值在所述主体高亮区域目标亮度值范围内；
    当所述主体低亮区域的亮度值不在所述主体低亮区域目标亮度值范围内时，调节所述主体低亮区域的亮度直至所述主体低亮区域的亮度值在所述主体低亮区域目标亮度值范围内。
  5. 根据权利要求1所述的方法，其特征在于，所述分别调节所述背景高亮区域以及所述背景低亮区域的亮度，包括：
    当所述背景高亮区域的亮度值不在所述背景高亮区域目标亮度值范围内时，调节所述背景高亮区域的亮度直至所述背景高亮区域的亮度值在所述背景高亮区域目标亮度值范围内；
    当所述背景低亮区域的亮度值不在所述背景低亮区域目标亮度值范围内时，调节所述背景低亮区域的亮度直至所述背景低亮区域的亮度值在所述背景低亮区域目标亮度值范围内。
  6. 根据权利要求1所述的方法，其特征在于，所述识别拍摄场景中的拍摄主体，包括：
    提取所述拍摄主体的特征；
    将所述特征与预设库存的主体特征比较，确定所述拍摄主体。
  7. 根据权利要求1所述的方法，其特征在于，所述获取所述拍摄场景中除所述拍摄主体外的拍摄背景所具有的不同亮度值之前，所述方法还包括：
    判断是否开启亮度调节功能；
    若开启，则执行所述获取所述拍摄场景中除所述拍摄主体外的拍摄背景所具有的不同亮度值的步骤。
  8. 一种亮度调节装置，其特征在于，包括：
    识别单元，用于识别拍摄场景中的拍摄主体；
    获取单元，用于获取所述拍摄场景中除所述拍摄主体外的拍摄背景所具有的不同亮度值；
    划分单元，用于根据所述不同亮度值将所述拍摄背景划分为背景高亮区域、背景低亮区域以及背景普通亮度区域；
    调节单元，用于分别调节所述背景高亮区域以及所述背景低亮区域的亮度；
    其中，所述背景低亮区域为具有的亮度值小于第一阈值的拍摄背景区域，所述背景高亮区域为具有的亮度值大于第二阈值的拍摄背景区域，所述第一阈值小于所述第二阈值。
  9. 一种终端，其特征在于，包括处理器、输入设备、输出设备和存储器，所述处理器、所述输入设备、所述输出设备和所述存储器相互连接，其中，所述存储器用于存储计算机程序，所述计算机程序包括程序指令，所述处理器被配置用于调用所述程序指令，执行如权利要求1-7任一项所述的方法。
  10. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，所述计算机程序包括程序指令，所述程序指令当被处理器执行时使所述处理器执行如权利要求1-7任一项所述的方法。
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