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WO2016004819A1 - Procede de prise de vue, dispositif de prise de vue et support de stockage informatique - Google Patents

Procede de prise de vue, dispositif de prise de vue et support de stockage informatique Download PDF

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Publication number
WO2016004819A1
WO2016004819A1 PCT/CN2015/082124 CN2015082124W WO2016004819A1 WO 2016004819 A1 WO2016004819 A1 WO 2016004819A1 CN 2015082124 W CN2015082124 W CN 2015082124W WO 2016004819 A1 WO2016004819 A1 WO 2016004819A1
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WIPO (PCT)
Prior art keywords
subject
photographing
background
moving
foreground
Prior art date
Application number
PCT/CN2015/082124
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English (en)
Chinese (zh)
Inventor
赵蕴泽
海茜
Original Assignee
努比亚技术有限公司
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Publication date
Application filed by 努比亚技术有限公司 filed Critical 努比亚技术有限公司
Publication of WO2016004819A1 publication Critical patent/WO2016004819A1/fr

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    • 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

Definitions

  • the invention relates to the field of photographing, and in particular to a photographing method, a photographing device and a computer storage medium.
  • Shooting equipment (such as digital cameras or mobile phones with cameras) has entered thousands of households, able to record every wonderful moment and leave a good memory for people.
  • the existing shooting equipment determines the subject and the shooting.
  • the relative position of the background if you want to modify it, can only be implemented through software post-processing, and in some specific application scenarios, the location area of the subject is limited, which is not convenient to adjust. At this time, if the background scene needs to be more complete. If presented, it may cause the subject to be too small or not fully displayed.
  • Embodiments of the present invention are expected to solve the problem that the relative position of the photographing subject and the background cannot be adjusted at the time of real-time photographing.
  • a shooting method provided by an embodiment of the present invention includes:
  • a composite photograph of the adjusted subject and the background is generated.
  • the method before the real-time extracting the subject in the foreground, the method further includes:
  • the extracting the moving subject in the foreground includes:
  • a body contour of the photographing subject is identified and extracted according to the threshold interval.
  • the adjusting the position of the shooting body in the background includes:
  • the position or size of the photographing subject is adjusted according to actual needs, and the position of the photographing subject in the background is determined.
  • the method further includes:
  • the synthesized photo is saved in real time.
  • the embodiment of the invention further provides a photographing device, the photographing device comprising:
  • An extraction module configured to extract a moving subject moving in the foreground
  • An adjustment module configured to adjust a position of the shooting body extracted by the extraction module in the background
  • a synthesis module configured to generate a composite photograph of the adjusted subject and the background.
  • the photographing apparatus further includes:
  • Preview module configured to turn on the framing preview of the camera.
  • the extraction module includes:
  • Selecting a unit configured to select a threshold interval of motion speed
  • the identification unit is configured to identify and extract a body contour of the photographing subject according to the threshold interval selected by the selection unit.
  • the adjustment module is configured to adjust a position or a size of the photographing subject according to actual needs, and determine a position of the photographing subject in the background.
  • the photographing apparatus further includes:
  • a storage module configured to save the composite photo in real time.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to execute the photographing method according to the embodiment of the invention.
  • the photographing method, the photographing apparatus and the computer storage medium provided by the embodiments of the present invention extract the photographing subject moving in the foreground; adjust the position of the photographing subject in the background; and generate a composite photograph of the adjusted photographing subject and the background.
  • the position area of the shooting subject is limited by the actual needs, the user adjusts the position of the shooting subject in real time to achieve the WYSIWYG effect, and satisfies the different usage scenarios of the user. Demand, enhance the user experience.
  • FIG. 1 is a schematic flow chart of an embodiment of a photographing method according to the present invention.
  • FIG. 2 is a schematic diagram of a refinement process of step S100 in FIG. 1;
  • FIG. 3 is a schematic flow chart of another embodiment of a photographing method according to the present invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of a photographing apparatus according to the present invention.
  • FIG. 5 is a schematic structural view of the extraction module of Figure 4.
  • Figure 6 is a block diagram showing the main electrical configuration of a camera of one embodiment of the present invention.
  • Embodiments of the present invention provide a photographing method capable of adjusting a position of a photographing subject, which is applied to a photographing apparatus.
  • 1 is a schematic flow chart of an embodiment of a photographing method according to the present invention; referring to FIG. 1, in an embodiment, the photographing method includes the following steps:
  • Step S100 extracting a moving subject moving in the foreground.
  • the method of detecting a moving object such as the optical flow method separates the foreground and the background of the currently captured image, extracts the subject in which the foreground is moving, and recognizes the contour of the subject.
  • the optical flow method is only used as an example here, and of course, it is not limited thereto, and other methods such as a map may be used.
  • the subject that is, the subject, can be understood as an object to be photographed.
  • Step S200 Adjust a position of the shooting subject in the background.
  • the position or size of the photographing subject is adjusted as needed, and the photographed subject after the enlargement is enlarged or dragged, and placed at an ideal position in the current background.
  • Step S300 generating a composite photograph of the adjusted photographing subject and the background.
  • the subject and the background image after the adjustment position are combined to generate a composite photograph, the best effect is displayed on the display, and the composite photograph is saved.
  • the photographing method provided in this embodiment includes the following steps: Step S100: extracting a moving subject moving in the foreground; Step S200, adjusting a position of the shooting subject in the background; Step S300, generating the shooting subject and the background Composite photo.
  • the beneficial effect that can be achieved is that the user adjusts the position of the shooting subject in real time according to actual needs, and the position of the shooting subject is adjusted in real time to achieve the WYSIWYG effect and meet the needs of the user in different usage scenarios. user experience.
  • FIG. 2 is a schematic diagram of the refinement process of step S100 in FIG. 1; referring to FIG. 2, the step S100 specifically includes:
  • Step S110 Select a threshold interval of the motion speed.
  • the motion speed threshold interval is selected through the menu, and the threshold actually determines the speed in the range as the detection target. For example, if the threshold is v, the motion speed is determined to be within the [va, v+b] threshold interval, and the threshold interval is characterized. The point is the key feature point of the shooting subject.
  • selecting the moving speed threshold interval it is necessary to ensure that the moving speed of the shooting subject is within the set threshold interval, and at the same time, the ending position of the shooting subject and the initial position are not overlapped, that is, one is moved.
  • the width value of the subject in the moving direction so that the interference can be eliminated in the frame-by-frame detection process, and the accurate recognition is completed, and the motion speed threshold interval is selected correctly, and the main subject can be excluded when the background is small. Interference caused by body movement.
  • Step S120 Identify and extract a body contour of the photographing subject according to the threshold interval.
  • the specific step of identifying and extracting the body contour of the photographing subject includes: processing a preview frame sequence of a continuously moving photographing subject; and using the target detection method for the preview frame sequence, detecting may occur
  • the foreground target if a foreground target is found in a certain frame and its representative key feature points are found, the key feature points can be randomly generated, or the corner points can be used as the key feature points, and the corner points are the local curvatures on the body contour.
  • the maximal point has a decisive effect on grasping the contour features of the main body. Once the contour features of the target are found, the shape of the target is roughly grasped.
  • the corner feature is an important feature of the image, and the corner points have rotation invariance among various image features.
  • the advantage of not changing with the change of illumination conditions, in the target recognition and target tracking the amount of data involved in the calculation can be reduced, without losing the important gray information of the image, and matching with the corner feature can greatly improve the matching speed;
  • the key feature point is the best position in the current frame, so as to obtain the position coordinates of the foreground target in the current frame; thus iteratively, the foreground target can be tracked, and the acquired foreground and background are separated, thereby filtering some objects. , screen out the required subject, identify the subject of the movement in the foreground, and outline the subject.
  • FIG. 3 is a schematic flowchart of another embodiment of a method for photographing the present invention.
  • the method further includes:
  • Step S100A Turn on the framing preview of the camera.
  • the camera's view preview is turned on, the preview function is loaded, the current picture is tracked in real time, the current subject and background are distinguished, and the moving track and position of the moving subject are tracked in time.
  • step S100A the photographing method of steps S100 to S300 shown in FIG. 1 is performed.
  • the steps S100 to S300 may be as shown above, and details are not described herein again.
  • the method further includes:
  • Step S400 saving the synthesized photo in real time.
  • the generated composite photo of the subject and the background is saved in real time for subsequent appreciation in the photo preview.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to execute the photographing method according to the embodiment of the invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of the photographing device of the present invention. Referring to FIG. 4, the photographing device includes:
  • the extraction module 20 is configured to extract a moving subject moving in the foreground
  • the adjusting module 30 is configured to adjust a position of the shooting body extracted by the extraction module 20 in the background;
  • the synthesis module 40 is configured to generate a composite photo of the subject and the background.
  • the imaging device extraction module 20 separates the foreground and the background of the currently captured image by a method of moving object detection such as the optical flow method, extracts the subject in the foreground movement, and recognizes the contour of the subject.
  • a method of moving object detection such as the optical flow method
  • the subject that is, the subject, can be understood as an object to be photographed.
  • the adjustment module 30 recognizes the contour of the photographing subject, the position or size of the photographing subject is adjusted as needed, and the photographed subject after the extraction is enlarged or dragged to be placed at an ideal position in the current background.
  • the synthesizing module 40 synthesizes the photographing subject and the background image after the adjusted position, generates a composite photograph, displays the best effect through the display, and saves the synthesized photograph.
  • the photographing apparatus includes: an extracting module 20 configured to extract a moving subject moving in the foreground; and an adjusting module 30 configured to adjust a position of the photographing subject extracted by the extracting module 20 in the background; 40. configured to generate a composite photograph of the adjusted subject and the background.
  • the beneficial effect can be achieved: the user shoots according to actual needs When the position area of the main body is limited, the position of the shooting subject is adjusted in real time to achieve the WYSIWYG effect, satisfying the needs of the user in different usage scenarios, and improving the user experience.
  • the extraction module 20 includes:
  • the selecting unit 21 is configured to select a threshold interval of the moving speed
  • the recognition unit 22 is configured to recognize and extract the body contour of the photographing subject according to the threshold interval selected by the selection unit 21.
  • the selection unit 21 selects a motion speed threshold interval through a menu, and the threshold actually determines the speed within a large range as a detection target. For example, if the threshold is v, the motion speed is determined to be within the [va, v+b] threshold interval.
  • the feature point of the threshold interval is the key feature point of the shooting subject.
  • the area that is, the width value of one subject in the moving direction, so that the interference can be eliminated in the frame-by-frame detection process, the accurate recognition is completed, and the motion speed threshold interval is correctly selected, and the movement of the subject when the background is small can be excluded.
  • the identifying unit 22 is configured to identify and extract a body contour of the shooting body according to the threshold interval, specifically: processing a preview frame sequence of a continuously moving subject; and using a target detecting method for the preview frame sequence To detect possible foreground targets; if a foreground target appears in a frame, find its representative key feature points, the corner points are the local maximum points of curvature on the body contour, which have a decisive effect on mastering the contour features of the body.
  • the contour feature of the target is found, and the shape of the target is roughly grasped.
  • the corner feature is an important feature of the image. In various image features, the corner point has the invariance of rotation and does not change with the illumination condition, and the target recognition and In the target tracking, the amount of data involved in the calculation can be reduced without losing the important gray information of the image.
  • the matching with the corner feature can greatly improve the matching speed; for any two adjacent video frames after that, look for The key feature points appearing in the previous frame are in the best position in the current frame, thus obtaining King targets Position coordinates in the current frame; thus iteratively, the foreground target can be tracked, the acquired foreground and background are separated, thereby filtering some objects, filtering out the required subject, and identifying the moving subject in the foreground. Outline the outline of the subject.
  • the photographing apparatus further includes:
  • the preview module 10 is configured to turn on the framing preview of the camera.
  • the preview module 10 turns on the framing preview of the camera, loads the preview function, performs real-time tracking on the current picture, distinguishes the current shooting subject and the background, and timely tracks the moving trajectory and position of the moving subject.
  • the photographing apparatus further includes:
  • the storage module 50 is configured to save the composite photo in real time.
  • the storage module 50 saves the generated composite photo of the shooting subject and the background in real time for subsequent appreciation in the photo preview.
  • the camera device can be implemented by a digital camera, a device having a camera (such as a mobile phone, a tablet computer, a notebook computer, etc.), and an extraction module 20, an adjustment module 30,
  • the synthesis module 40 and the preview module 10, and the selection unit 21 and the identification unit 22 included in the extraction module 20, in practical applications, can pass through a central processing unit (CPU) in the camera.
  • CPU central processing unit
  • a signal processor DSP, Digital Signal Processor
  • FPGA Field-Programmable Gate Array
  • the memory module 50 in the camera device can be implemented by a memory in the camera device in practical applications.
  • FIG. 6 is a block diagram showing the main electrical configuration of a camera of one embodiment of the present invention.
  • the photographic lens 101 is composed of a plurality of optical lenses for forming a subject image, and is a single focus lens or a zoom lens.
  • the photographic lens 101 can be moved in the optical axis direction by the lens driving unit 111, and controls the focus position of the taking lens 101 based on the control signal from the lens driving control unit 112, and also controls the focus distance in the case of the zoom lens.
  • the lens drive control circuit 112 follows the micro
  • the control command of the computer 107 performs drive control of the lens driving unit 111.
  • An imaging element 102 is disposed in the vicinity of a position where the subject image is formed by the photographing lens 101 on the optical axis of the photographing lens 101.
  • the imaging element 102 functions as an imaging unit that captures a subject image and acquires captured image data.
  • Photodiodes constituting each pixel are two-dimensionally arranged in a matrix on the imaging element 102. Each photodiode generates a photoelectric conversion current corresponding to the amount of received light, and the photoelectric conversion current is charged by a capacitor connected to each photodiode.
  • the front surface of each pixel is provided with a Bayer array of RGB color filters.
  • the imaging element 102 is connected to an imaging circuit 103 that performs charge accumulation control and image signal readout control in the imaging element 102, and performs waveform shaping after reducing the reset noise of the read image signal (analog image signal). Further, gain improvement or the like is performed to obtain an appropriate signal level.
  • the imaging circuit 103 is connected to the A/D conversion unit 104, which performs analog-to-digital conversion on the analog image signal, and outputs a digital image signal (hereinafter referred to as image data) to the bus 199.
  • image data a digital image signal
  • the bus 199 is a transmission path for transmitting various data read or generated inside the camera.
  • the A/D conversion unit 104 is connected to the bus 199, and an image processor 105, a JPEG processor 106, a microcomputer 107, a SDRAM (Synchronous DRAM) 108, and a memory interface (hereinafter referred to as a memory I/F) are connected. 109. LCD (Liquid Crystal Display) driver 110.
  • the image processor 105 performs various kinds of images such as OB subtraction processing, white balance adjustment, color matrix calculation, gamma conversion, color difference signal processing, noise removal processing, simultaneous processing, edge processing, and the like on the image data based on the output of the imaging element 102. deal with.
  • the JPEG processor 106 compresses the image data read out from the SDRAM 108 in accordance with the JPEG compression method. Further, the JPEG processor 106 performs decompression of JPEG image data for image reproduction display. When the decompression is performed, the file recorded in the recording medium 115 is read out, and after the compression processing is performed in the JPEG processor 106, The decompressed image data is temporarily stored in the SDRAM 108 and displayed on the LCD 116. Further, in the present embodiment, the JPEG method is adopted as the image compression/decompression method. However, the compression/decompression method is not limited thereto, and other compression/decompression methods such as MPEG, TIFF, and H.264 may be used.
  • the microcomputer 107 functions as a control unit of the entire camera, and collectively controls various processing sequences of the camera.
  • the microcomputer 107 is connected to the operation unit 113 and the flash memory 114.
  • the operation unit 113 includes but is not limited to a physical button or a virtual button, and the entity or virtual button may be a power button, a camera button, an edit button, a dynamic image button, a reproduction button, a menu button, a cross button, an OK button, a delete button, and an enlarge button.
  • the operation members such as various input buttons and various input keys are detected, and the operation states of these operation members are detected.
  • the detection result is output to the microcomputer 107.
  • a touch panel is provided on the front surface of the LCD 116 as a display portion, and the touch position of the user is detected, and the touch position is output to the microcomputer 107.
  • the microcomputer 107 executes various processing sequences corresponding to the operation of the user based on the detection result of the operation member from the operation unit 113. (Similarly, this place can be changed to the computer 107 to execute various processing sequences corresponding to the user's operation based on the detection result of the touch panel on the front of the LCD 116.)
  • the flash memory 114 stores programs for executing various processing sequences of the microcomputer 107.
  • the microcomputer 107 performs overall control of the camera in accordance with the program. Further, the flash memory 114 stores various adjustment values of the camera, and the microcomputer 107 reads out the adjustment value, and performs control of the camera in accordance with the adjustment value.
  • the SDRAM 108 is an electrically rewritable volatile memory for temporarily storing image data or the like.
  • the SDRAM 108 temporarily stores image data output from the A/D conversion unit 104 and image data processed in the image processor 105, the JPEG processor 106, and the like.
  • the memory interface 109 is connected to the recording medium 115, and performs control for writing image data and a file header attached to the image data to the recording medium 115 and reading from the recording medium 115.
  • the recording medium 115 is, for example, a recording medium such as a memory card that can be detachably attached to the camera body. However, it is not limited thereto, and may be a hard disk or the like built in the camera body.
  • the LCD driver 110 is connected to the LCD 116, and stores image data processed by the image processor 105 in the SDRAM.
  • the image data stored in the SDRAM is read and displayed on the LCD 116, or the image data stored in the JPEG processor 106 is compressed.
  • the JPEG processor 106 reads the compressed image data of the SDRAM, decompresses it, and displays the decompressed image data on the LCD 116.
  • the LCD 116 is disposed on the back surface of the camera body or the like to perform image display.
  • the LCD 116 is provided with a touch panel that detects a user's touch operation.
  • the liquid crystal display panel (LCD 116) is disposed as the display portion.
  • the present invention is not limited thereto, and various display panels such as an organic EL may be employed.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk.
  • optical disk A medium that can store program code.
  • the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disk, or an optical disk.
  • Embodiments of the present invention extract a photographing subject moving in the foreground; adjust a position of the photographing subject in the background; and generate a composite photograph of the adjusted photographing subject and the background.
  • the position area of the shooting subject is limited by the actual needs, the user adjusts the position of the shooting subject in real time to achieve the WYSIWYG effect, and satisfies the different usage scenarios of the user. Demand, enhance the user experience.

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  • Multimedia (AREA)
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Abstract

L'invention concerne un procédé de prise de vue qui comprend les étapes suivantes : extraire un objet photographié qui se déplace dans le premier plan ; régler la position de l'objet photographié dans l'arrière-plan ; et produire une photo synthétisée de l'objet photographié et de l'arrière-plan. La présente invention concerne également un dispositif de prise de vue et un support de stockage informatique.
PCT/CN2015/082124 2014-07-11 2015-06-23 Procede de prise de vue, dispositif de prise de vue et support de stockage informatique WO2016004819A1 (fr)

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CN201410332162.5A CN104135612B (zh) 2014-07-11 2014-07-11 一种可调节拍摄主体位置的拍摄方法和拍摄装置
CN201410332162.5 2014-07-11

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CN106375667A (zh) * 2016-09-26 2017-02-01 宇龙计算机通信科技(深圳)有限公司 照片处理方法及系统
CN106506963A (zh) * 2016-11-30 2017-03-15 努比亚技术有限公司 一种基于双摄像头的拍照方法及终端
CN107155064B (zh) * 2017-06-23 2019-11-05 维沃移动通信有限公司 一种拍摄方法及移动终端
CN107967693B (zh) * 2017-12-01 2021-07-09 北京奇虎科技有限公司 视频关键点处理方法、装置、计算设备及计算机存储介质
CN108989699B (zh) * 2018-08-06 2021-03-23 Oppo广东移动通信有限公司 图像合成方法、装置、成像设备、电子设备以及计算机可读存储介质
CN112839170B (zh) * 2020-12-31 2022-07-05 上海米哈游天命科技有限公司 拍摄方法、装置、电子设备及存储介质
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