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WO2019061042A1 - Procédé de compensation d'exposition, dispositif et support de stockage lisible par ordinateur - Google Patents

Procédé de compensation d'exposition, dispositif et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2019061042A1
WO2019061042A1 PCT/CN2017/103548 CN2017103548W WO2019061042A1 WO 2019061042 A1 WO2019061042 A1 WO 2019061042A1 CN 2017103548 W CN2017103548 W CN 2017103548W WO 2019061042 A1 WO2019061042 A1 WO 2019061042A1
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WO
WIPO (PCT)
Prior art keywords
difference
exposure compensation
value
compensation
face area
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/103548
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English (en)
Chinese (zh)
Inventor
赵玮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Transsion Communication Co Ltd
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Shenzhen Transsion Communication Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shenzhen Transsion Communication Co Ltd filed Critical Shenzhen Transsion Communication Co Ltd
Priority to CN201780097079.6A priority Critical patent/CN111567034A/zh
Priority to PCT/CN2017/103548 priority patent/WO2019061042A1/fr
Publication of WO2019061042A1 publication Critical patent/WO2019061042A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to the field of intelligent terminals, and in particular, to a method and apparatus for exposure compensation and a computer readable storage medium.
  • the camera device carried by the intelligent terminal on the market adopts the automatic exposure mode (AE), which is an exposure mode that automatically determines the exposure combination (aperture/shutter) according to the brightness of the subject and the focal length of the lens.
  • AE automatic exposure mode
  • the AE exposure technology has only one exposure value.
  • the dark-skinned portrait is dark.
  • a piece of background; or a dark-skinned portrait is prone to overexposure when the dark-skinned portrait is exposed. Therefore, the traditional exposure compensation method is difficult to meet the user's photographing needs, resulting in poor user experience.
  • the main object of the present invention is to provide a method, terminal and computer readable storage medium for exposure compensation, which aims to solve the technical problem that the traditional photographing method can not simultaneously expose the dark-skinned portrait and the light-skinned portrait and the light-colored background.
  • the present invention provides a method of exposure compensation, the method of exposure compensation comprising the following steps:
  • the image signal processor ISP is activated to perform corresponding exposure compensation on the face area and the non-face area.
  • the step of initiating corresponding exposure compensation by the image signal processor ISP to the face region and the non-face region according to the preset compensation rule, the first difference value, and the second difference value include:
  • the method further includes:
  • the step of initiating corresponding exposure compensation by the image signal processor ISP to the face region and the non-face region according to the preset compensation rule, the first difference value, and the second difference value include:
  • the method further includes:
  • the method further includes:
  • the photographing is completed according to the preset default photographing rule.
  • the method before the step of acquiring the first brightness value corresponding to the face area in the shooting area and the second brightness value corresponding to the non-face area, the method further includes:
  • an area matching the photographing area and the pre-stored face data is marked as a face area, and an area that does not match the pre-stored face data is marked as a non-face area.
  • the method further includes:
  • the photographing is completed according to a preset default photographing rule.
  • the present invention also provides a computer readable storage medium having stored thereon an exposure compensation program, the exposure compensation program being executed by a processor to implement the above-described The steps of the method of exposure compensation.
  • the present invention provides a method and apparatus for exposure compensation, and a computer readable storage medium.
  • the method of exposure compensation acquires a first brightness value and a non-face corresponding to a face area in a shooting area when a photographing instruction is received. a second brightness value corresponding to the area; calculating a first difference between the target brightness threshold and the first brightness value, and calculating a second difference between the target brightness threshold and the second brightness value;
  • the image signal processor ISP is activated to perform corresponding exposure compensation on the face area and the non-face area.
  • the present invention first divides the photographing area into a face area and a non-face area, and calculates a first difference value of the face area to be compensated, and a to-be-compensated value of the non-face area. Two differences. Then, the ISP is activated to perform exposure compensation on the face area and the non-face area according to the corresponding first difference value and second difference value.
  • the dark skin color, light-skinned portrait or background in the shooting area can be separately obtained corresponding to the exposure compensation, thereby solving the technical problem that the traditional photographing method can not simultaneously expose the dark-skinned portrait and the light-skinned portrait and the light-colored background. .
  • FIG. 1 is a schematic structural diagram of a terminal in a hardware operating environment of an apparatus for exposure compensation according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a first embodiment of a method for exposure compensation according to the present invention
  • FIG. 3 is a schematic flow chart of a second embodiment of a method for exposure compensation according to the present invention.
  • FIG. 4 is a schematic flow chart of a third embodiment of a method for exposure compensation according to the present invention.
  • the main idea of the solution of the embodiment of the present invention is: acquiring a first brightness value corresponding to a face area in a shooting area and a second brightness value corresponding to a non-face area when receiving a photographing instruction; calculating a target brightness threshold and the a first difference of the first brightness value, and calculating a second difference between the target brightness threshold and the second brightness value; according to the preset compensation rule, the first difference, and the second difference,
  • the startup image signal processor ISP performs corresponding exposure compensation on the face region and the non-face region, and solves the technical problem that the traditional photographing method dark-skinned portraits and light-skinned portraits, and the light-colored background cannot be normally exposed at the same time.
  • FIG. 1 is a schematic structural diagram of a terminal in a hardware operating environment of an apparatus for exposure compensation according to an embodiment of the present invention.
  • the terminal in the embodiment of the present invention may be a PC, or may be a smart phone, a tablet computer, an e-book reader, and an MP4 (Moving). Picture Experts Group Audio Layer IV, dynamic imaging experts compress standard audio layers 3) portable terminals such as players and portable computers with display functions.
  • the terminal can include a processor 1001 (eg, a CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.
  • the communication bus 1002 is configured to implement connection communication between the components;
  • the optional user interface 1003 may include a display, an input unit such as a keyboard, and the network interface 1004 may optionally include a standard wired interface.
  • Wireless interface such as WI-FI interface); memory 1005 can be high-speed RAM memory or stable memory (non-volatile Alternatively, the memory 1005 may alternatively be a storage device independent of the processor 1001 described above.
  • the terminal structure of the hardware operating environment of the exposure compensation device shown in FIG. 1 does not constitute a limitation of the device for exposure compensation of the present invention, and may include more or less components than those illustrated, or a combination thereof. Some components, or different component arrangements.
  • the memory 1005 as a computer storage medium of FIG. 1 may include an operating system, a network communication module, a user interface module, and a program for exposure compensation.
  • the network interface 1004 is mainly used to connect to the cloud server for data communication with the cloud server; the user interface 1003 can be connected to the client (user end) for data communication with the client; and the processor 1001 can A program for calling exposure compensation stored in the memory 1005 and performing the following operations:
  • the image signal processor ISP is activated to perform corresponding exposure compensation on the face area and the non-face area.
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • the photographing is completed according to the preset default photographing rule.
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • an area matching the photographing area and the pre-stored face data is marked as a face area, and an area that does not match the pre-stored face data is marked as a non-face area.
  • processor 1001 may also call the program of exposure compensation stored in the memory 1005 to perform the following operations:
  • the photographing is completed according to a preset default photographing rule.
  • FIG. 2 is a schematic flow chart of a first embodiment of a method for exposure compensation according to the present invention.
  • the method for exposure compensation includes the following steps:
  • Step S10 when receiving the photographing instruction, acquiring a first brightness value corresponding to the face area in the shooting area and a second brightness value corresponding to the non-face area;
  • the face region and the non-face region are divided, and the face region and the non-face region are calculated.
  • the ISP is then activated to perform corresponding exposure compensation on the face area and the non-face area.
  • the method for providing exposure compensation of the present invention can be applied to an intelligent terminal, which can be a digital camera, a tablet computer or a smart phone.
  • the smart phone is taken as an example in this embodiment.
  • the photographing instruction may be a user operation trigger.
  • the photographing program may be a photographing program carried by the smart terminal itself, or may be an application program developed based on an operating system of the smart terminal.
  • the smartphone enters the photographing program, the selected shooting area is acquired, and the face area and the non-face area in the shooting area are divided. Then, the brightness value first brightness value and the second brightness value corresponding to the face area and the non-face area are obtained. And storing the brightness value.
  • the brightness value corresponding to the first face region corresponding to the two faces and the brightness value corresponding to the second face are further acquired. Then, as in the above steps, the corresponding calculation of the brightness output value is performed separately, and then the corresponding exposure compensation is performed.
  • Step S20 calculating a first difference between the target brightness threshold and the first brightness value, and calculating a second difference between the target brightness threshold and the second brightness value;
  • the smart phone when acquiring the first brightness value of the face area and the second brightness value data of the non-face area, acquires a pre-stored target brightness threshold, where the target brightness threshold is the optimal brightness of the picture, and the calculation is performed. And a first difference ⁇ Y1 between the target brightness threshold and the first brightness value, and a second difference ⁇ Y2 between the target brightness threshold and the second brightness value.
  • the first difference value and the second difference value are respectively the brightness difference values to be compensated corresponding to the face area and the non-face area.
  • Step S30 starting the image signal processor ISP to perform corresponding exposure compensation on the face area and the non-face area according to the preset compensation rule, the first difference value, and the second difference value.
  • the terminal automatically starts The ISP processes the image data, and divides the AE compensation configuration of the smart terminal according to the brightness distribution of each area, and configures the face area and the non-face area according to the first difference and the second difference. Corresponding AE compensation intensity.
  • first coordinate value of the face region and the second coordinate value of the non-face region are acquired, and the first coordinate value and the second coordinate value are correspondingly stored.
  • the brightness values of the face area and the non-face area are acquired, and the coordinates of each brightness area are obtained; after the smart terminal enters the photographing program, the system automatically acquires the face area and the non-person in the shooting scene selected by the user.
  • the system may first detect the face and obtain the corresponding position information, that is, the coordinate value, and feed back the coordinate value of the face position to the smart terminal, and the system acquires the brightness value Y of each face region in the scene according to the position data, and The value Y and its corresponding coordinate value are fed back to the smart terminal.
  • the embodiment provides a method and device for exposure compensation, and a computer readable storage medium.
  • the method for obtaining exposure compensation acquires a first brightness value corresponding to a face region in a shooting area and a non-human when receiving a photographing instruction. a second brightness value corresponding to the face region; calculating a first difference between the target brightness threshold and the first brightness value, and calculating a second difference between the target brightness threshold and the second brightness value;
  • the rule, the first difference value and the second difference value, the activation image signal processor ISP performs corresponding exposure compensation on the face area and the non-face area.
  • the present invention first divides the photographing area into a face area and a non-face area, and calculates a first difference value of the face area to be compensated, and a to-be-compensated value of the non-face area. Two differences. Then, the ISP is activated to perform exposure compensation on the face area and the non-face area according to the corresponding first difference value and second difference value. In this way, the dark skin color, light-skinned portrait or background in the shooting area can be separately obtained corresponding to the exposure compensation, thereby solving the technical problem that the traditional photographing method can not simultaneously expose the dark-skinned portrait and the light-skinned portrait and the light-colored background. .
  • FIG. 3 is a schematic flow chart of a second embodiment of a method for exposure compensation according to the present invention.
  • step S30 includes:
  • Step S31 starting the image signal processor ISP, and dividing the AE compensation configuration according to the face area and the non-face area;
  • the exposure compensation device activates the image signal processor ISP, and according to the pre-stored face data, the area where the shooting area matches the pre-stored face data is marked as a face area, and The area where the pre-stored face data does not match is marked as a non-face area.
  • the AE compensation configuration is then segmented according to the face area and the non-face area. Corresponding exposure compensation of the face area and the non-face area is implemented.
  • Step S32 performing exposure compensation on the face region by the image signal processor ISP according to the segmentation AE compensation configuration and the first difference value;
  • the image signal processor ISP is activated, and then the first difference corresponding to the face region is compensated according to the segmentation AE compensation configuration and a first difference between the face region and the target brightness threshold.
  • the exposure is such that the face area achieves the best picture brightness.
  • Step S33 according to the split AE compensation configuration and the second difference, the non-face area is subjected to exposure compensation by the image signal processor ISP.
  • the image signal processor ISP is activated, and then according to the segmentation AE compensation configuration and the second difference between the non-face region, that is, the background region and the target brightness threshold, the non-face region is The background area compensates for the exposure corresponding to the second difference, so that the non-face area, that is, the background area, achieves the best photographing brightness.
  • the activation image signal processor ISP performs exposure compensation on the first coordinate value corresponding to the face region; according to the preset compensation rule and the second difference, The startup image signal processor ISP performs exposure compensation on the second coordinate value corresponding to the non-face area.
  • the embodiment provides a method and device for exposure compensation, and a computer readable storage medium.
  • the method for obtaining exposure compensation acquires a first brightness value corresponding to a face region in a shooting area and a non-human when receiving a photographing instruction. a second brightness value corresponding to the face region; calculating a first difference between the target brightness threshold and the first brightness value, and calculating a second difference between the target brightness threshold and the second brightness value;
  • the rule, the first difference value and the second difference value, the activation image signal processor ISP performs corresponding exposure compensation on the face area and the non-face area.
  • the present invention first divides the photographing area into a face area and a non-face area, and calculates a first difference value of the face area to be compensated, and a to-be-compensated value of the non-face area. Two differences. Then, the ISP is activated to perform exposure compensation on the face area and the non-face area according to the corresponding first difference value and second difference value. In this way, the dark skin color, light-skinned portrait or background in the shooting area can be separately obtained corresponding to the exposure compensation, thereby solving the technical problem that the traditional photographing method can not simultaneously expose the dark-skinned portrait and the light-skinned portrait and the light-colored background. .
  • FIG. 4 is a schematic flow chart of a third embodiment of a method for exposure compensation according to the present invention.
  • the method for exposure compensation further includes:
  • Step S40 calculating a difference between the first brightness value and the second brightness value, and determining whether the difference is greater than a preset difference threshold
  • the smartphone automatically compares the luminance difference values ⁇ Y1 and ⁇ Y2 calculated by the system with the target brightness threshold.
  • the smart phone described in this embodiment is provided with a data processing module, which can be used to compare the calculated different brightness difference values ⁇ Y1 and ⁇ Y2 with the target brightness threshold.
  • the target brightness threshold used in the present embodiment is a brightness threshold set in advance in the smartphone based on the brightness recognition ability of the human eye.
  • step S50 when the difference is less than the preset difference threshold, the photographing is completed according to the preset default photographing rule.
  • the default photographing mode is continued to be used.
  • Step S60 calculating a first difference between the target brightness threshold and the first brightness value when the difference is greater than the preset difference threshold, and calculating the target brightness threshold and the second brightness value. Difference.
  • the smartphone automatically starts.
  • the ISP processes the image data, and divides the AE compensation configuration of the smart phone according to the brightness distribution of the face area and the non-face area, and configures the corresponding AE compensation intensity according to the corresponding coordinates of each brightness area.
  • the method for exposure compensation further includes:
  • Step S70 determining whether the difference between the first difference value and the second difference value is within a preset range value
  • the difference between the brightness value of the face area and the target brightness threshold may be further determined, and the difference between the brightness value of the non-face area and the target brightness threshold is second.
  • the difference between the differences is determined by determining whether the difference reaches a difference threshold that requires corresponding exposure compensation.
  • Step S80 If the first difference value and the second difference value are within a preset range value, the photographing is completed according to a preset default photographing rule.
  • the process returns to the above step S30, otherwise, the default photographing mode is continued.
  • the embodiment provides a method and device for exposure compensation, and a computer readable storage medium.
  • the method for obtaining exposure compensation acquires a first brightness value corresponding to a face region in a shooting area and a non-human when receiving a photographing instruction. a second brightness value corresponding to the face region; calculating a first difference between the target brightness threshold and the first brightness value, and calculating a second difference between the target brightness threshold and the second brightness value;
  • the rule, the first difference value and the second difference value, the activation image signal processor ISP performs corresponding exposure compensation on the face area and the non-face area.
  • the present invention first divides the photographing area into a face area and a non-face area, and calculates a first difference value of the face area to be compensated, and a to-be-compensated value of the non-face area. Two differences. Then, the ISP is activated to perform exposure compensation on the face area and the non-face area according to the corresponding first difference value and second difference value. In this way, the dark skin color, light-skinned portrait or background in the shooting area can be separately obtained corresponding to the exposure compensation, thereby solving the technical problem that the traditional photographing method can not simultaneously expose the dark-skinned portrait and the light-skinned portrait and the light-colored background. .
  • the invention also provides a computer readable storage medium.
  • a program for exposure compensation is stored on the computer readable storage medium of the present invention, and the program of the exposure compensation is implemented by the processor to implement the steps of the intelligent method as described above.
  • portions of the technical solution of the present invention that contribute substantially or to the prior art may be embodied in the form of a software product stored in a storage medium (such as a ROM/RAM as described above). , a disk, an optical disk, including a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a terminal device which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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Abstract

La présente invention concerne un procédé de compensation d'exposition, un dispositif et un support de stockage lisible par ordinateur. Le procédé de compensation d'exposition comprend, lors de la réception d'une instruction de photographie, l'acquisition d'une première valeur de luminosité correspondant à une région de visage humain et d'une seconde valeur de luminosité correspondant à une région de visage non humain dans une région de photographie ; le calcul d'une première valeur de différence entre un seuil de luminosité cible et la première valeur de luminosité, et le calcul d'une seconde valeur de différence entre le seuil de luminosité cible et la seconde valeur de luminosité ; et selon une règle de compensation prédéfinie, la première valeur de différence et la seconde valeur de différence, l'activation d'un processeur de signal d'image (ISP) afin d'effectuer une compensation d'exposition correspondante sur la région de visage humain et la région de visage non humain. La compensation d'exposition est effectuée sur des régions correspondantes selon la première valeur de différence et de la seconde valeur de différence. La présente invention permet d'effectuer une compensation d'exposition correspondante séparément sur l'image humaine à peau sombre et à peau claire ou l'arrière-plan dans la région de photographie, et résout le problème technique selon lequel l'image humaine à peau sombre et l'image humaine à peau claire et l'arrière-plan de couleur claire ne peuvent pas être normalement exposés de manière synchrone.
PCT/CN2017/103548 2017-09-26 2017-09-26 Procédé de compensation d'exposition, dispositif et support de stockage lisible par ordinateur Ceased WO2019061042A1 (fr)

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CN201780097079.6A CN111567034A (zh) 2017-09-26 2017-09-26 曝光补偿的方法、装置及计算机可读存储介质
PCT/CN2017/103548 WO2019061042A1 (fr) 2017-09-26 2017-09-26 Procédé de compensation d'exposition, dispositif et support de stockage lisible par ordinateur

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CN114092383A (zh) * 2020-08-24 2022-02-25 珠海全志科技股份有限公司 基于人脸图像的isp自适应调整控制方法以及装置
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CN112950509A (zh) * 2021-03-18 2021-06-11 杭州海康威视数字技术股份有限公司 一种图像处理方法、装置及电子设备
CN112950509B (zh) * 2021-03-18 2023-10-10 杭州海康威视数字技术股份有限公司 一种图像处理方法、装置及电子设备
CN115225825A (zh) * 2022-06-30 2022-10-21 北京都视科技有限公司 曝光调节系统、方法、装置以及存储介质
CN115225825B (zh) * 2022-06-30 2023-11-10 北京都视科技有限公司 曝光调节系统、方法、装置以及存储介质
CN115866408A (zh) * 2022-12-09 2023-03-28 北京经纬恒润科技股份有限公司 自动曝光控制方法和装置

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