WO2022100677A1 - 一种拍照预览方法、装置、存储介质和电子设备 - Google Patents

一种拍照预览方法、装置、存储介质和电子设备 Download PDF

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Publication number
WO2022100677A1
WO2022100677A1 PCT/CN2021/130199 CN2021130199W WO2022100677A1 WO 2022100677 A1 WO2022100677 A1 WO 2022100677A1 CN 2021130199 W CN2021130199 W CN 2021130199W WO 2022100677 A1 WO2022100677 A1 WO 2022100677A1
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WIPO (PCT)
Prior art keywords
image
camera
preview
main
photographing
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PCT/CN2021/130199
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English (en)
French (fr)
Inventor
从勇
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北京爱芯科技有限公司
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Publication of WO2022100677A1 publication Critical patent/WO2022100677A1/zh

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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
    • H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
    • 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
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
    • H04N23/632—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters

Definitions

  • the present application relates to the field of mobile terminal photographing technologies, and in particular, to a photographing preview method, apparatus, storage medium and electronic device.
  • the pixels of the camera of the mobile terminal are getting larger and larger (for example, the pixel of the camera of the mobile terminal may be 100 million pixels, etc.), when a user uses a high-resolution camera (for example, a 100 million pixel camera, etc.) to take pictures , due to the influence of the transmission rate of the Mobile Industry Processor Interface (MIPI), the frame rate is low, which cannot meet the minimum video viewing requirements of the human eye.
  • MIPI Mobile Industry Processor Interface
  • the general practice is to use a low-resolution image (for example, a 12-megapixel image) for preview when taking a photo, and switch to high-resolution photo mode when the user clicks to take a photo.
  • a high-resolution image eg, a 100-megapixel image, etc.
  • has a lower frame rate so it will not transmit the high-resolution image to the display screen for preview. Therefore, generally, the screen of the mobile terminal suddenly goes black or an animation is added, and after the photographing is completed, the image is switched to a low-resolution image to continue the preview.
  • the preview screen of the mobile terminal cannot be continuously displayed at the moment of taking a picture and before and after taking a picture, which will cause problems affecting user experience.
  • Embodiments of the present application provide a method, apparatus, storage medium, and electronic device for photographing and previewing, so as to solve the problems existing in the related art that affect user experience.
  • Some embodiments of the present application provide a photo preview method.
  • the photo preview method is applied to a mobile terminal.
  • the mobile terminal includes a main camera and a sub-camera.
  • the field of view of the sub-camera is larger than that of the main camera. : obtain a shooting instruction; in response to the shooting instruction, crop out a first preview image from the sub-camera image collected by the sub-camera, wherein the field of view corresponding to the first preview image and the view angle corresponding to the first main-shot image collected by the main camera The field angle is the same; the first preview image is displayed.
  • the field of view is cropped by using the sub-camera image collected from the sub-camera with a larger field of view, so as to use the cropped first preview image for preview display, so as to enter the high-resolution photography mode
  • the mobile terminal can still display the picture, thereby realizing the continuous display of the preview picture and improving the user experience.
  • the method for taking pictures and previewing may further include: acquiring a second main camera image, where the second main camera image is captured by the main camera or The second main image is obtained by compressing the first main image, and the resolution of the second main image is smaller than that of the first main image; the second main image is displayed.
  • the second main photographing image may be used as a preview image before the photographing instruction is obtained.
  • the method for photographing and previewing may further include: continuously cropping the secondary photographing image collected by the secondary camera to obtain the second preview image,
  • the field angle corresponding to the second preview image is the same as the field angle corresponding to the second main image, and the resolution of the second main image is smaller than the resolution of the first main image; the second preview image is continuously displayed.
  • the second preview image may be used as the preview image before the shooting instruction is obtained.
  • the mobile terminal may display the second preview image before or after taking a photo, and at the moment of taking a photo, the mobile terminal may display the first preview image.
  • the method for previewing a photograph may further include: adjusting the photographing parameters of the main camera and/or the photographing parameters of the sub-camera, so that the second image captured by the main camera The main camera image and the sub-camera image collected by the sub-camera have the same look and feel.
  • the camera parameters can be adjusted so that the picture styles of the main camera and the sub-camera are consistent, so that the first preview image cropped from the sub-camera image does not look different to the user, thereby improving the user experience. experience.
  • the camera parameters may include any one or more of exposure, white balance and focus.
  • the mobile terminal may store the mapping relationship between the coordinates of the vertices of the first main camera image and the coordinates of the target points in the sub camera image corresponding to the vertices of the first main camera image, from the sub camera Cropping out the first preview image from the captured secondary image may include: acquiring the coordinates of the vertices of the first main image; determining the coordinates of the target point according to the coordinates of the vertices and the mapping relationship; The position of the target area corresponding to the first preview image is determined in the middle; according to the position of the target area, the first preview image is cropped from the sub-photographed image.
  • mapping relationship can be used to accurately realize the cutting of the first preview image.
  • the photographing preview device is applied to a mobile terminal.
  • the mobile terminal may include a main camera and a sub-camera.
  • the preview device may include: an acquisition module configured to acquire a shooting instruction; a cropping module configured to, in response to the shooting instruction, crop out a first preview image from the sub-camera image captured by the sub-camera, wherein the first preview image is The field of view corresponding to the preview image is the same as the field of view corresponding to the first main image captured by the main camera; the display module is configured to display the first preview image.
  • the acquiring module may be further configured to acquire a second main camera image, where the second main camera image is acquired by the main camera or obtained by compressing the first main camera image , and the resolution of the second main camera image is smaller than the resolution of the first main camera image; the display module may also be configured to display the second main camera image.
  • the cropping module may be further configured to continuously perform cropping processing on the sub-camera image collected by the sub-camera to obtain a second preview image, wherein the angle of view corresponding to the second preview image and the first The field angles corresponding to the two main camera images are the same, and the resolution of the second main camera image is smaller than the resolution of the first main camera image; the display module may also be configured to continuously display the second preview image.
  • the mobile terminal may display the second preview image before or after taking a photo, and at the moment of taking a photo, the mobile terminal may display the first preview image.
  • the apparatus for photographing and previewing may further include an adjustment module configured to adjust the camera parameters of the main camera and/or the camera parameters of the sub camera, so that the main camera The collected second main image and the auxiliary image collected by the auxiliary camera have the same look and feel.
  • the camera parameters may include any one or more of exposure, white balance and focus.
  • the mobile terminal may store the mapping relationship between the coordinates of the vertex of the first main image and the coordinates of the target point corresponding to the vertex of the first main image in the sub image
  • the cropping module may is configured to: obtain the coordinates of the vertex of the first main image; determine the coordinates of the target point according to the coordinates of the vertex and the mapping relationship; determine the target corresponding to the first preview image from the secondary image according to the coordinates of the target point The location of the area; according to the location of the target area, the first preview image is cropped from the sub-photographed image.
  • Still other embodiments of the present application provide a storage medium on which a computer program is stored, and when the computer program is run by a processor, some embodiments of the present application or any of some embodiments of the present application may be executed. The method described in the selected implementation.
  • Still other embodiments of the present application provide an electronic device, which may include: a processor, a memory, and a bus, where the memory stores machine-readable instructions executable by the processor, and when the electronic device runs, the The processor and the memory communicate through a bus, and the machine-readable instructions are executed by the processor to execute some embodiments of the present application or any optional implementation manner of some embodiments of the present application. method described.
  • FIG. 1 shows a flowchart of a method for photographing and previewing provided by an embodiment of the present application
  • FIG. 2 shows a schematic diagram of the back of a mobile terminal provided by an embodiment of the present application
  • FIG. 3 shows a structural block diagram of a device for taking pictures and previewing provided by an embodiment of the present application
  • FIG. 4 is a structural block diagram of an electronic device provided by an embodiment of the present application.
  • the mobile terminal when taking a picture and previewing, the mobile terminal does not preview the image with the maximum resolution captured by the camera.
  • the mobile terminal can use a low-resolution image of 12 million pixels to preview . Then, if the user chooses to shoot a high-resolution image of 100 million pixels, but because the bandwidth of the transmission pipeline is limited, the transmission rate is reduced at this time, so that the frame rate of the 100 million pixel image cannot reach 30 frames. At the same time, the frame rate of the display screen of the mobile terminal is 60 frames, and the pictures the user sees at this time are also intermittent.
  • the general practice is to set the screen of the mobile terminal to black or add a scene animation at the moment of taking a picture to avoid the above problems. And, after taking pictures, switch to a low-resolution image to continue previewing.
  • the screen of the mobile terminal is set to be black or a scene animation is added, the preview screen of the mobile terminal is interrupted at the moment of taking a picture and before and after taking a picture, thereby causing problems affecting user experience.
  • an embodiment of the present application provides a photographing preview solution.
  • a photographing preview solution By acquiring a photographing instruction, obtaining a photographing instruction, and responding to the photographing instruction, a first preview image is cropped from a secondary photographing image collected by a secondary camera, wherein the first preview image is The field of view corresponding to a preview image is the same as the field of view corresponding to the first main image captured by the main camera, and the first preview image is displayed.
  • the field of view is cropped by using the sub-camera image collected from the sub-camera with a larger field of view, so as to use the cropped first preview image for preview display, so as to enter the high-resolution photography mode
  • the mobile terminal can still display the picture, thereby realizing the continuous display of the preview picture and improving the user experience.
  • FIG. 1 shows a flowchart of a method for photographing and previewing provided by an embodiment of the present application.
  • the photo preview method shown in FIG. 1 can be applied to a mobile terminal.
  • the mobile terminal includes a main camera and a sub-camera, and the field of view of the sub-camera is larger than that of the main camera.
  • the photo preview method may include:
  • Step S110 before acquiring the photographing instruction, the mobile terminal displays the first image.
  • the first image may be the second main image, or may be a second preview image continuously cropped from the sub-images collected by the sub-camera, wherein the field of view corresponding to the second preview image and the second main image are The field of view of the captured image is the same, and the content of the second preview image is the same as the content of the second main captured image, and the embodiment of the present application is not limited to this.
  • FIG. 2 shows a schematic diagram of the back of a mobile terminal provided by an embodiment of the present application.
  • the mobile terminal shown in FIG. 2 includes a telephoto camera 210 , a wide-angle camera 220 and an ultra-wide-angle camera 230 .
  • the main camera in the embodiment of the present application may be the wide-angle camera 220
  • the sub-camera in the embodiment of the present application may be the ultra-wide-angle camera 230 .
  • the main camera may be referred to as the first camera, and the sub camera may also be referred to as the second camera, and the embodiments of the present application are not limited thereto.
  • the mobile terminal has three cameras as an example for description, those skilled in the art should understand that the mobile terminal may also have more or less cameras, as long as the mobile terminal has three cameras.
  • a secondary camera with a larger field of view than the main camera will do.
  • the sub-camera in this embodiment of the present application may be any one of the above-mentioned at least two sub-cameras.
  • the second main camera image may be collected by the main camera, or may be obtained by compressing the resolution of the first main camera image, and the resolution of the second main camera image is higher than that of the first main camera image. resolution is small.
  • the second main camera image may be a 12 million pixel image obtained by compressing the 100 million pixel image.
  • the mobile terminal acquires the second main camera image, and the mobile terminal displays the second main camera image.
  • the second main photographing image may be used as a preview image before the photographing instruction is obtained.
  • the mobile terminal acquires the second main camera image captured by the main camera and the sub-camera image captured by the sub-camera, and the mobile terminal can continuously crop out the second preview image from the sub-camera image.
  • the field angle corresponding to the second preview image is the same as the field angle corresponding to the second main image, and the resolution of the second main image is smaller than the resolution of the first main image.
  • the mobile terminal displays the second preview image.
  • the specific resolution of the first main image and the specific resolution of the second main image can be set according to actual needs, as long as the resolution of the first main image is guaranteed to be greater than that of the second main image. That is, the embodiments of the present application are not limited to this.
  • the resolution of the first main camera image may be 108 million pixels, and the resolution of the second main camera image may be 12 million pixels.
  • the second preview image may be used as the preview image before the shooting instruction is obtained.
  • the specific process for the mobile terminal to crop the second preview image from the sub-camera image is similar to the specific process for the mobile terminal to crop the first preview image from the sub-camera image captured by the sub-camera. Refer to the related description of cropping the first preview image from the sub-photographed image captured by the sub-camera by the mobile terminal in the following, which will not be repeated here.
  • Step S120 the mobile terminal obtains a shooting instruction.
  • the mobile terminal obtains a photographing instruction.
  • Step S130 in response to the shooting instruction, the mobile terminal cuts out a first preview image from the sub-photographed image collected by the sub-camera.
  • the field angle corresponding to the first preview image is the same as the field angle corresponding to the first main image captured by the main camera, and the content of the first preview image is the same as the content of the first main image.
  • the mobile terminal may enter a high-resolution shooting mode.
  • the mobile terminal can turn on the sub-camera (the sub-camera is not turned on in the existing preview mode), and adjust the camera parameters of the main camera and/or the camera parameters of the sub-camera, so that the main camera image ( For example, the first main camera image and the second main camera image, etc.) and the sub-camera image collected by the sub-camera have the same look and feel (for example, the brightness, color, etc.
  • the mobile terminal may crop out the first preview image from the secondary photographing image photographed by the secondary camera.
  • the mobile terminal can turn on the ultra-wide-angle camera, and adjust the camera parameters of the main camera and/or the sub-camera.
  • the camera parameters of the camera so that the main camera image collected by the main camera and the sub camera image collected by the sub camera have the same look and feel.
  • the viewing angle of the wide-angle camera can be cropped from the image collected by the ultra-wide-angle camera.
  • the display capability of the display screen of the mobile terminal for example, the display capability of 2 million pixels, etc.
  • the acquisition capability of the camera for example, the acquisition capability of more than 10 million pixels
  • the mobile terminal can adjust the camera parameters of the main camera and/or the camera parameters of the sub camera before the mobile terminal enters the high-resolution shooting mode as an example for description, this field It should be understood by those skilled in the art that the mobile terminal may also execute related solutions in other modes, and the embodiments of the present application are not limited thereto.
  • the mobile terminal when the mobile terminal enters the high-resolution photography mode, the mobile terminal can turn on the ultra-wide-angle camera, and set the camera parameters of the main camera and the camera parameters of the sub-camera to the same camera parameters.
  • the camera parameters may include any one or more of exposure, white balance, and focus.
  • the mobile terminal can expose the wide-angle camera.
  • the time and the exposure time of the ultra-wide-angle camera are adjusted so that the exposure time of the ultra-wide-angle camera is longer than that of the ultra-wide-angle camera, so that the brightness of the image captured by the wide-angle camera is consistent with the brightness of the image captured by the ultra-wide-angle camera.
  • the mobile terminal may store the coordinates of the vertices of the main camera image (for example, the first main camera image or the second main camera image, etc.) under different focal lengths and the vertices in the sub camera image and the main camera image.
  • the mapping relationship between the coordinates of the corresponding target points therefore, in the case of determining the current focal lengths of the two cameras, the mobile terminal can obtain the coordinates of the vertices of the first main image Query the mapping relationship between the coordinates and the current focal length, so as to obtain the coordinates of the target point corresponding to the vertex, and then determine the position of the target area corresponding to the first preview image from the secondary image according to the coordinates of the target point corresponding to the vertex, and then according to the target area. position, and crop the first preview image from the secondary image.
  • the mobile terminal can obtain the coordinates of the four vertices of the first main-camera image, and query the mapping relationship according to the coordinates of the four vertices and the first focal length, obtain the coordinates of the four target points corresponding to all the vertices under the first focal length, and then determine the first target point from the secondary image according to the coordinates of the four target points.
  • the position of the target area corresponding to the preview image, and then according to the position of the target area, the first preview image is cropped from the sub-photographed image.
  • the main camera and the sub-camera can shoot the same checkerboard, where the checkerboard is the area that the two cameras will eventually display. At the same time, the checkerboard just fills the shooting area of the main camera. Since the two cameras shoot the same scene, and the checkerboard can be identified by different colors or numbers, the position of the same scene in the images captured by the two cameras can be demarcated, and then the two cameras are at the focal length f 1 The corresponding mapping relationship can be determined.
  • the mapping relationship corresponding to the focal length f 2 can be obtained according to the method of the focal length f 1 .
  • the mobile terminal stores the mapping relationship corresponding to the focal length f n and the mapping relationship corresponding to the focal length f n+2 and does not store the mapping relationship corresponding to the focal length f n+1 , this If you want to determine the mapping relationship corresponding to the focal length f n+1 , you can obtain the mapping relationship corresponding to the focal length f n+1 according to the mapping relationship corresponding to the focal length f n , the mapping relationship corresponding to the focal length f n+2 , and the interpolation algorithm relation.
  • the interpolation algorithm may be a bilinear interpolation method, or may be a bicubic interpolation method or the like.
  • mapping relationship corresponding to the focal length f n the mapping relationship corresponding to the focal length f n+2 , and the interpolation algorithm
  • specific process of obtaining the mapping relationship corresponding to the focal length f n+1 can also be set according to actual needs.
  • the embodiment is not limited to this.
  • Step S140 the mobile terminal displays the first preview image.
  • the embodiment of the present application can display the first preview image at the moment of taking a photo, so that the photo preview can be realized before and after the photo is taken and at the moment of taking the photo, thereby realizing the continuous display of the preview screen and improving the user experience.
  • Step S150 after the photographing is completed, the mobile terminal displays the second image.
  • the second image may be the second main camera image, or may be a second preview image cropped from the sub camera image collected by the sub camera, wherein the field of view corresponding to the second preview image and the second main camera
  • the field of view of the images is the same, and the content of the second preview image is the same as the content of the second main image, which is not limited to this embodiment of the present application.
  • the mobile terminal may acquire the second main camera image, and the mobile terminal may display the second main camera image.
  • the mobile terminal before or after taking a picture, the mobile terminal can display the second main camera image. And, at the moment of taking a photo, the mobile terminal may display the first preview image.
  • the mobile terminal may continue to perform cropping processing on the secondary photographed image collected by the secondary camera to obtain the second preview image.
  • the field angle corresponding to the second preview image is the same as the field angle corresponding to the second main image, and the resolution of the second main image is smaller than the resolution of the first main image.
  • the mobile terminal continuously displays the second preview image.
  • the mobile terminal may display the second preview image before or after the photograph is taken. And, at the moment of taking a photo, the mobile terminal may display the first preview image.
  • the field of view is cropped by using the sub-camera image collected from the sub-camera with a larger field of view, so as to use the cropped first preview image for preview display, so as to enter the high-resolution photography mode
  • the mobile terminal can still display the picture, thereby realizing the continuous display of the preview picture and improving the user experience.
  • FIG. 3 shows a structural block diagram of a photographing preview apparatus 300 provided by an embodiment of the present application.
  • the photographing preview device 300 corresponds to the above method embodiments, and can execute various methods involved in the above method embodiments. Steps, the specific functions of the photographing preview device 300 can be referred to the above description, in order to avoid repetition, the detailed description is appropriately omitted here.
  • the photographing preview device 300 includes at least one software function module that can be stored in a memory in the form of software or firmware (firmware) or solidified in an operating system (operating system, OS) of the photographing preview device 300 .
  • the photographing preview device 300 is applied to a mobile terminal.
  • the mobile terminal includes a main camera and a sub-camera.
  • the field of view of the sub-camera is larger than that of the main camera.
  • the photographing preview device 300 may include:
  • the acquiring module 310 may be configured to acquire a shooting instruction; the cropping module 320 is used to, in response to the shooting instruction, crop out a first preview image from the sub-camera image collected by the sub-camera, wherein the view corresponding to the first preview image is The field angle is the same as the field angle corresponding to the first main image captured by the main camera; the display module 330 is configured to display the first preview image.
  • the cropping module 320 may also be configured to continuously perform cropping processing on the secondary image captured by the secondary camera to obtain a second preview image, wherein the angle of view corresponding to the second preview image
  • the field of view corresponding to the second main image is the same, and the resolution of the second main image is smaller than the resolution of the first main image
  • the display module 330 may also be configured to continuously display the second preview image.
  • the photographing preview apparatus 300 may further include an adjustment module (not shown), and the adjustment module may be configured to adjust the camera parameters of the main camera and/or the camera of the sub camera parameters, so that the second main image captured by the main camera and the sub image captured by the sub camera have the same look and feel.
  • the camera parameters may include any one or more of exposure, white balance and focus.
  • the mobile terminal may store the mapping relationship between the coordinates of the vertices of the first main image and the coordinates of the target points in the sub image corresponding to the vertices of the first main image.
  • the cropping module 320 It can be configured to: obtain the coordinates of the vertices of the first main image; determine the coordinates of the target point according to the coordinates of the vertices and the mapping relationship; The position of the target area; according to the position of the target area, the first preview image is cropped from the sub-photographed image.
  • FIG. 4 is a structural block diagram of an electronic device 400 provided by an embodiment of the present application.
  • Electronic device 400 may include processor 410 , communication interface 420 , memory 430 , and at least one communication bus 440 .
  • the communication bus 440 is used to realize the direct connection and communication of these components.
  • the communication interface 420 in this embodiment of the present application may be configured to perform signaling or data communication with other devices.
  • the processor 410 may be an integrated circuit chip with signal processing capability.
  • the above-mentioned processor 410 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC) , off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • a general purpose processor may be a microprocessor or the processor 410 may be any conventional processor or the like.
  • the memory 430 can be, but is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only Memory, PROM), erasable read only memory Memory (Erasable Programmable Read-Only Memory, EPROM), Electrical Erasable Programmable Read-Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.
  • Computer-readable instructions are stored in the memory 430, and when the computer-readable instructions are executed by the processor 410, the electronic device 400 can perform the various steps in the above method embodiments.
  • the electronic device 400 may further include a memory controller, an input-output unit, an audio unit, and a display unit.
  • the elements of the memory 430, storage controller, processor 410, peripheral interface, input/output unit, audio unit, and display unit are directly or indirectly electrically connected to each other to realize data transmission or interaction.
  • these components may be electrically connected to each other through one or more communication buses 440 .
  • Processor 410 may be configured to execute executable modules stored in memory 430 .
  • the electronic device 400 may be configured to perform the following method: acquiring a shooting instruction; in response to the shooting instruction, cropping out a first preview image from the sub-photographing image collected by the sub-camera, wherein the video corresponding to the first preview image is The field angle is the same as the field angle corresponding to the first main image captured by the main camera; the first preview image is displayed.
  • the input and output unit is used for providing input data to the user to realize the interaction between the user and the server (or the local terminal).
  • the input and output unit may be, but not limited to, a mouse, a keyboard, and the like.
  • the audio unit provides the user with an audio interface, which may include one or more microphones, one or more speakers, and audio circuitry.
  • the display unit provides an interactive interface (eg, a user operation interface) between the electronic device and the user or is used to display image data for the user's reference.
  • the display unit may be a liquid crystal display or a touch display.
  • a touch display it can be a capacitive touch screen or a resistive touch screen that supports single-point and multi-touch operations. Supporting single-point and multi-touch operation means that the touch display can sense the touch operation from one or more positions on the touch display at the same time, and hand over the sensed touch operation to the processor. calculation and processing.
  • FIG. 4 is only for illustration, and the electronic device 400 may further include more or less components than those shown in FIG. 4 , or have different configurations than those shown in FIG. 4 .
  • Each component shown in FIG. 4 can be implemented in hardware, software, or a combination thereof.
  • the present application also provides a storage medium, where a computer program may be stored on the storage medium, and the computer program is executed by a processor to execute the method described in the method embodiments.
  • the present application also provides a computer program product, which, when running on a computer, causes the computer to execute the method described in the method embodiments.
  • each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more functions for implementing the specified logical function(s) executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures.
  • each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions.
  • each functional module in each embodiment of the present application may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.
  • the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the related technology or the part of the technical solution.
  • the computer software product is stored in a storage medium, including several The instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .
  • relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists.
  • the terms "comprising”, “comprising” or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.
  • an element qualified by the phrase "comprising a" does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.
  • the present application provides a method, device, storage medium and electronic device for taking pictures and previewing.
  • the method for taking pictures and previewing includes: acquiring a photographing instruction; in response to the photographing instruction, cropping out a first preview image from a sub-photographing image collected by a sub-camera, wherein , the field of view corresponding to the first preview image is the same as the field of view corresponding to the first main image captured by the main camera; the first preview image is displayed.
  • the field of view is cropped by the secondary camera image collected from the secondary camera with a larger field of view, so that the cropped first preview image is used for preview display, so that when entering the high-resolution photography mode,
  • the mobile terminal can still display the picture, thereby realizing the continuous display of the preview picture and improving the user experience.
  • a photographing preview method, apparatus, storage medium and electronic device of the present application are reproducible and can be used in various industrial applications.
  • the photographing preview method, apparatus, storage medium and electronic device of the present application can be used in the technical field of photographing by mobile terminals.

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Abstract

本申请实施例提供一种拍照预览方法、装置、存储介质和电子设备，该拍照预览方法包括：获取拍摄指令；响应于拍摄指令，从副摄像头采集的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同；显示第一预览图像。本申请实施例通过从视场角更大的副摄像头采集的副摄图像来进行视场角的裁剪，从而利用裁剪出的第一预览图像进行预览显示，从而在进入高分辨率拍照模式时，移动终端仍可显示画面，进而实现了预览画面的持续显示，提升了用户体验。

Description

一种拍照预览方法、装置、存储介质和电子设备
相关申请的交叉引用
本申请要求于2020年11月13日提交中国国家知识产权局的申请号为202011275562.9、名称为“一种拍照预览方法、装置、存储介质和电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及移动终端拍照技术领域，尤其涉及一种拍照预览方法、装置、存储介质和电子设备。
背景技术
目前，移动终端的摄像头的像素越来越大(例如，移动终端的摄像头的像素可为一亿像素等)，当用户使用高分辨率的摄像头(例如，一亿像素的摄像头等)进行拍照时，由于移动产业处理器接口(Mobile Industry Processor Interface，MIPI)的传输速率的影响，导致帧率较低，从而无法满足人眼最低观看视频的需求。
所以，一般的做法是，在拍照预览时，可使用低分辨率的图像(例如，1200万像素的图像)来进行预览，当用户点击拍照的瞬间，可切换到高分辨率拍照模式，但是由于高分辨率的图像(例如，一亿像素的图像等)的帧率较低，所以，其不会把高分辨率的图像传输到显示屏进行预览。从而，一般是移动终端的画面突然黑一下或者加个动画，待拍照结束后，再切换到低分辨率的图像来继续进行预览。
在实现本发明的过程中，发明人发现相关技术中存在如下问题：由于在拍照的瞬间和拍照前后，移动终端的预览画面是无法持续显示的，从而会引起影响用户体验的问题。
发明内容
本申请实施例提供了一种拍照预览方法、装置、存储介质和电子设备，以解决相关技术中存在着的影响用户体验的问题。
本申请的一些实施例提供了一种拍照预览方法，拍照预览方法应用于移动终端，移动终端包括主摄像头和副摄像头，副摄像头的视场角大于主摄像头的视场角，拍照预览方法可以包括：获取拍摄指令；响应于拍摄指令，从副摄像头采集的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同；显示第一预览图像。
因此，本申请实施例通过从视场角更大的副摄像头采集的副摄图像来进行视场角的裁剪，从而利用裁剪出的第一预览图像进行预览显示，从而在进入高分辨率拍照模式时，移动终端仍可显示画面，进而实现了预览画面的持续显示，提升了用户体验。
在一个可能的实施例中，在获取拍摄指令之前，或者在显示第一预览图像之后，拍照预览方法还可以包括：获取第二主摄图像，其中，第二主摄图像是主摄像头采集的或者对第一主摄图像进行压缩处理后获得的，且第二主摄图像的分辨率小于第一主摄图像的分辨率；显示第二主摄图像。
因此，本申请实施例可将第二主摄图像作为未获取到拍摄指令前的预览图像。
在一个可能的实施例中，在获取拍摄指令之前，或者在显示第一预览图像之后，拍照预览方法还可以包括：持续对副摄像头采集的副摄图像进行裁剪处理，以获得第二预览图像，其中，第二预览图像对应的视场角和第二主摄图像对应的视场角相同，第二主摄图像的分辨率小于第一主摄图像的分辨率；持续显示第二预览图像。
因此，本申请实施例可将第二预览图像作为未获取到拍摄指令前的预览图像。
在一个可能的实施例中，在拍照前或者拍照完成后，所述移动终端可以显示所述第二预览图像，以及在拍照的瞬间，所述移动终端可以显示所述第一预览图像。
在一个可能的实施例中，在获取拍摄指令之前，拍照预览方法还可以包括：调整所述主摄像头的摄像参数和/或所述副摄像头的摄像参数，以使得所述主摄像头采集的第二主摄图像和所述副摄像头采集的副摄图像观感一致。
因此，本申请实施例可通过调整摄像参数使得主摄像头和副摄像头的画风是一致的，从而从副摄图像中裁剪出的第一预览图像，用户看起来也是没什么差异的，从而提升了用户的体验。
在一个可能的实施例中，摄像参数可以包括曝光、白平衡和聚焦中的任意一个或者多个。
在一个可能的实施例中，移动终端可以存储有第一主摄图像的顶点的坐标和副摄图像中与第一主摄图像的顶点对应的目标点的坐标之间的映射关系，从副摄像头拍摄的副摄图像中裁剪出第一预览图像可以包括：获取第一主摄图像的顶点的坐标；根据顶点的坐标和映射关系，确定目标点的坐标；根据目标点的坐标，从副摄图像中确定第一预览图像对应的目标区域的位置；根据目标区域的位置，从副摄图像中裁剪出第一预览图像。
因此，本申请实施例可通过上述映射关系，来精确地实现第一预览图像的剪切。
本申请的另一些实施例提供了一种拍照预览装置，该拍照预览装置应用于移动终端，移动终端可以包括主摄像头和副摄像头，副摄像头的视场角大于主摄像头的视场角，该拍照预览装置可以包括：获取模块，被配置成用于获取拍摄指令；裁剪模块，被配置成用于响应于拍摄指令，从副摄像头拍摄的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头拍摄的第一主摄图像对应的视场角相同；显示模块，被配置成用于显示第一预览图像。
在一个可能的实施例中，获取模块，还可以被配置成用于获取第二主摄图像，其中，第二主摄图像是主摄像头采集的或者对第一主摄图像进行压缩处理后获得的，且第二主摄图像的分辨率小于第一主摄图像的分辨率；显示模块，还可以被配置成用于显示第二主摄图像。
在一个可能的实施例中，裁剪模块还可以被配置成用于持续对副摄像头采集的副摄图像进行裁剪处理，以获得第二预览图像，其中，第二预览图像对应的视场角和第二主摄图像对应的视场角相同，第二主摄图像的分辨率小于第一主摄图像的分辨率；显示模块还可以被配置成用于持续显示第二预览图像。
在一个可能的实施例中，在拍照前或者拍照完成后，所述移动终端可以显示所述第二预览图像，以及在拍照的瞬间，所述移动终端可以显示所述第一预览图像。
在一个可能的实施例中，拍照预览装置还可以包括调整模块，该调整模块被配置成用于调整所述主摄像头的摄像参数和/或所述副摄像头的摄像参数，以使得所述主摄像头采集的第二主摄图像和所述副摄像头采集的副摄图像观感一致。
在一个可能的实施例中，摄像参数可以包括曝光、白平衡和聚焦中的任意一个或者多个。
在一个可能的实施例中，移动终端可以存储有第一主摄图像的顶点的坐标和副摄图像中与第一主摄图像的顶点对应的目标点的坐标之间的映射关系，裁剪模块可以被配置成用于：获取第一主摄图像的顶点的坐标；根据顶点的坐标和映射关系，确定目标点的坐标；根据目标点的坐标，从副摄图像中确定第一预览图像对应的目标区域的位置；根据目标区域的位置，从副摄图像中裁剪出第一预览图像。
本申请的又一些实施例提供了一种存储介质，该存储介质上存储有计算机程序，该计算机程序被处理器运行时执行本申请的一些实施例或本申请的一些实施例中的任一可选的实现方式所述的方法。
本申请的再一些实施例提供了一种电子设备，可以包括：处理器、存储器和总线，所述存储器存储有所述处理器可执行的机器可读指令，当所述电子设备运行时，所述处理器与所述存储器之间通过总线通信，所述机器可读指令被所述处理器执行时执行本申请的一些实施例或本申请的一些实施例中的任一可选的实现方式所述的方法。
本申请的其他实施例提供了一种计算机程序产品，所述计算机程序产品在计算机上运行时，可以使得计算机执行本申请的一些实施例或本申请的一些实施例中的任意可能的实现方式中的方法。
为使本申请实施例所要实现的上述目的、特征和优点能更明显易懂，下文特举较佳实施例，并配合所附附图，作详细说明如下。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1示出了本申请实施例提供的一种拍照预览方法的流程图；
图2示出了本申请实施例提供的一种移动终端的背面的示意图；
图3示出了本申请实施例提供的一种拍照预览装置的结构框图；
图4是本申请实施例提供的一种电子设备的结构框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。同时，在本申请的描述中，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
目前，在拍照预览的时候，移动终端不会以摄像头拍摄的最大分辨率的图像来进行预览。
例如，在预览的时候，由于移动终端的摄像头拍摄的图像的分辨率已经远远大于移动终端的显示屏的分辨率，所以，移动终端可利用一个1200万像素的低分辨率的图像来进行预览。随后，若用户选择拍摄一亿像素的高分辨率的图像，但是由于传输管道的带宽是有限的，这时候传输速率下降，从而会使得一亿像素的图像的帧率到不了30帧。同时，移动终端的显示屏的帧率为60帧，这时候用户看到的画面也是断断续续的。
所以，一般的做法是在拍照的瞬间，将移动终端的画面设置成黑色或者添加个场景动画，来避免上述问题。以及，待拍照结束后，再切换到低分辨率的图像来继续进行预览。
但是，由于将移动终端的画面设置成黑色或者添加场景动画的缘故，从而使得在拍照的瞬间和拍照前后，移动终端的预览画面是中断了的，进而引起了影响用户体验的问题。
基于此，本申请实施例提供了一种拍照预览方案，通过获取拍摄指令，以及获取拍摄指令，以及响应于拍摄指令，从副摄像头采集的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同，以及显示第一预览图像。
因此，本申请实施例通过从视场角更大的副摄像头采集的副摄图像来进行视场角的裁剪，从而利用裁剪出的第一预览图像进行预览显示，从而在进入高分辨率拍照模式时，移动终端仍可显示画面，进而实现了预览画面的持续显示，提升了用户体验。
请参见图1，图1示出了本申请实施例提供的一种拍照预览方法的流程图。如图1所示的拍照预览方法可应用于移动终端，移动终端包括主摄像头和副摄像头，且副摄像头的视场角大于主摄像头的视场角，该拍照预览方法可以包括：
步骤S110，在未获取到拍摄指令之前，移动终端显示第一图像。
应理解，第一图像可以是第二主摄图像，也可以是持续从副摄像头采集的副摄图像中裁剪出的第二预览图像，其中，第二预览图像对应的视场角和第二主摄图像的视场角相同，且第二预览图像的内容和第二主摄图像的内容一样，本申请实施例并不局限于此。
还应理解，主摄像头的具体类型和副摄像头的具体类型均可根据实际需求来进行设置，本申请实施例并不局限于此。
例如，请参见图2，图2示出了本申请实施例提供的一种移动终端的背面的示意图。如图2所示的移动终端包括长焦摄像头210、广角摄像头220和超广角摄像头230。其中，本申请实施例中的主摄像头可以为广角摄像头220，以及本申请实施例中的副摄像头可以为超广角摄像头230。
还应理解，主摄像头可以称为第一摄像头，副摄像头也可以称为第二摄像头，本申请实施例并不局限于此。
此外，这里需要说明的是，虽然上面以移动终端具有三个摄像头为例来进行描述的，但本领域的技术人员应当理解，移动终端还可具有更多或者更少的摄像头，只要移动终端具有一个比主摄像头视场角更大的副摄像头即可。
还应理解，在移动终端具有至少两个比主摄像头视场角更大的副摄像头的情况下，本申请实施例中的副摄像头可以为上述至少两个副摄像头中的任意一个副摄像头。
还应理解，第二主摄图像可以是主摄像头采集的，也可以是对第一主摄图像进行分辨率的压缩处理后获得的，且第二主摄图像的分辨率比第一主摄图像的分辨率小。
例如，在移动终端的主摄像头的最大分辨率为一亿像素的情况下，第二主摄图像可以是将一亿像素的图像压缩处理后获得的1200万像素的图像。
为了便于理解本申请实施例，下面通过具体的实施例来进行描述。
可选地，在未获取到拍摄指令之前，移动终端获取第二主摄图像，以及移动终端显示第二主摄图像。
因此，本申请实施例可将第二主摄图像作为未获取到拍摄指令前的预览图像。
可选地，在未获取到拍摄指令之前，移动终端获取主摄像头采集的第二主摄图像和副摄像头采集的副摄图像，以及移动终端可从副摄图像中持续裁剪出第二预览图像。其中，第二预览图像对应的视场角和第二主摄图像对应的视场角相同，且第二主摄图像的分辨率小于第一主摄图像的分辨率。以及，移动终端显示第二预览图像。
应理解，第一主摄图像的具体分辨率和第二主摄图像的具体分辨率均可根据实际需求来进行设置，只要保证第一主摄图像的分辨率大于第二主摄图像的分辨率即可，本申请实施例并不局限于此。
例如，第一主摄图像的分辨率可为1.08亿像素，第二主摄图像的分辨率可为1200万像素。
因此，本申请实施例可将第二预览图像作为未获取到拍摄指令前的预览图像。
这里还需要说明的是，移动终端从副摄图像中裁剪出第二预览图像的具体过程和移动终端从副摄像头拍摄的副摄图像中裁剪出第一预览图像的具体过程是类似的，具体可参见下文中的移动终端从副摄像头拍摄的副摄图像中裁剪出第一预览图像的相关描述，在此不再赘述。
步骤S120，移动终端获取拍摄指令。
具体地，在用户点击拍照的情况下，移动终端获取拍摄指令。
步骤S130，响应于拍摄指令，移动终端从副摄像头采集的副摄图像中裁剪出第一预览图像。其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同，且第一预览图像的内容和第一主摄图像的内容一样。
具体地，在获取到拍摄指令之前，移动终端可进入高分辨率拍摄模式。同时，移动终端可打开副摄像头(现有的预览模式中是不打开该副摄像头的)，并调整主摄像头的摄像参数和/或副摄像头的摄像参数，以使得主摄像头采集的主摄图像(例如，第一主摄图像和第二主摄图像等)和副摄像头采集的副摄图像观感一致(例如，亮度、颜色等看起来是一致的)，从而由于两个摄像头的生产厂商、批次或者型号是不相同的，可通过调整两个摄像头的摄像参数使得用户看到的两个摄像头采集的图像的画风是一致的。以及，在获取到拍摄指令之后，移动终端可从副摄像头拍摄的副摄图像中裁剪出第一预览图像。
例如，在主摄像头为广角摄像头且副摄像头为超广角摄像头的情况下，若预测到将进入高分辨率拍照模式，则移动终端可打开超广角摄像头，并调整主摄像头的摄像参数和/或副摄像头的摄像参数，以使得主摄像头采集的主摄图像和副摄像头采集的副摄图像观感一致。以及，由于超广角摄像头的分辨率和帧率可以满足人眼观看视频的需求，即其不会影响显示，所以，可从超广角摄像头采集的图像中裁剪出广角摄像头的视角。
此外，这里需要说明的是，由于移动终端的显示屏的显示能力(例如，200万像素的显示能力等)远远小于摄像头的采集能力(例如，1000万像素以上的采集能力)，所以，将裁剪出来的第一预览图像进行显示，对用户来说是无异常感知的。
另外，这里还需要说明的是，虽然上面以在移动终端进入高分辨率拍摄模式之前，移动终端可调整主摄像头的摄像参数和/或副摄像头的摄像参数为例来进行描述的，但本领域 的技术人员应当理解，移动终端还可在其他的模式下来执行相关方案，本申请实施例并不局限于此。
例如，在移动终端进入高分辨率拍照模式时，移动终端可打开超广角摄像头，并将主摄像头的摄像参数和副摄像头的摄像参数设置成相同的摄像参数。
应理解，摄像参数所包含的具体参数可根据实际需求来进行设置，本申请实施例并不局限于此。
例如，摄像参数可包括曝光、白平衡和聚焦中的任意一个或者多个。
还应理解，移动终端调整主摄像头的摄像参数和/或副摄像头的摄像参数的具体过程也可根据实际需求来进行设置，本申请实施例并不局限于此。
例如，在主摄像头为广角摄像头且副摄像头为超广角摄像头且摄像参数包括曝光时间的情况下，若超广角摄像头的感光能力比广角摄像头的感光能力差一些，则移动终端可对广角摄像头的曝光时间和超广角摄像头的曝光时间进行调整，以使得超广角摄像头的曝光时间长于超广角摄像头的曝光时间，从而实现了广角摄像头采集的图像的亮度和超广角摄像头采集的图像的亮度是一致的。
还应理解，移动终端从副摄像头采集的副摄图像中裁剪出第一预览图像的具体过程可根据实际需求来进行设置，本申请实施例并不局限于此。
可选地，由于移动终端可存储有在不同焦距下的主摄图像(例如，第一主摄图像或者第二主摄图像等)的顶点的坐标和副摄图像中与主摄图像中的顶点对应的目标点的坐标之间的映射关系，所以，在确定两个摄像头的当前焦距的情况下，移动终端可获取第一主摄图像的顶点的坐标，并根据第一主摄图像的顶点的坐标和当前焦距查询映射关系，从而获得顶点对应的目标点的坐标，进而根据顶点对应的目标点的坐标，从副摄图像中确定第一预览图像对应的目标区域的位置，进而根据目标区域的位置，从副摄图像中裁剪出第一预览图像。
例如，在主摄像头的焦距和副摄像头的焦距均为第一焦距且第一主摄图像和副摄图像均呈矩形的情况下，移动终端可获取第一主摄图像的四个顶点的坐标，并根据四个顶点的坐标和第一焦距查询映射关系，获得在第一焦距下的所有顶点对应的四个目标点的坐标，进而根据四个目标点的坐标，从副摄图像中确定第一预览图像对应的目标区域的位置，进而根据目标区域的位置，从副摄图像中裁剪出第一预览图像。
应理解，映射关系的获取过程可根据实际需求来进行设置，本申请实施例并不局限于此。
例如，在主摄像头的焦距和副摄像头的焦距均为焦距f 1的情况下，可通过主摄像头和副摄像头去拍摄同一个棋盘格，这里的棋盘格就是两个摄像头最终要显示的区域，此时棋 盘格正好把主摄像头的拍摄区域给塞满。由于两个摄像头拍摄的是同一个景物，且棋盘格可通过不同的颜色或者数字等来标识，从而同一景物在两个摄像头拍摄的图像中的位置能够标定出来，进而两个摄像头在焦距f 1对应的映射关系可以确定出来。以及，对于焦距f 2、焦距f 3等，均可按照焦距f 1的方法来获取焦距f 2对应的映射关系、焦距f 3对应的映射关系等。
此外，这里需要说明的是，在移动终端存储有焦距f n对应的映射关系和焦距f n+2对应的映射关系的映射关系且没有存储焦距f n+1对应的映射关系的情况下，此时若想要确定焦距f n+1对应的映射关系，则可根据焦距f n对应的映射关系、焦距f n+2对应的映射关系和插值算法，则可获取焦距f n+1对应的映射关系。
应理解，插值算法的具体算法可根据实际需求来进行设置，本申请实施例并不局限于此。
例如，插值算法可以为双线性插值法，也可以为双三次插值法等。
还应理解，根据焦距f n对应的映射关系、焦距f n+2对应的映射关系和插值算法，获取焦距f n+1对应的映射关系的具体过程也可根据实际需求来进行设置，本申请实施例并不局限于此。
步骤S140，移动终端显示第一预览图像。
因此，本申请实施例可在拍照的瞬间显示第一预览图像，从而在拍照前后和拍照的瞬间，都能够实现拍照预览，进而实现了预览画面的持续显示，提升了用户体验。
步骤S150，在拍照完成后，移动终端显示第二图像。
应理解，第二图像可以是第二主摄图像，也可以是从副摄像头采集的副摄图像中裁剪出的第二预览图像，其中，第二预览图像对应的视场角和第二主摄图像的视场角相同，且第二预览图像的内容和第二主摄图像的内容一样，本申请实施例并不局限于此。
还应理解，步骤S150中的第二主摄图像的相关描述可参见之前的相关描述，在此不再赘述。
为了便于理解本申请实施例，下面通过具体的实施例来进行描述。
可选地，在拍照完成后，移动终端可获取第二主摄图像，以及移动终端显示第二主摄图像。
例如，在拍照前或者拍照完成后，移动终端均可显示第二主摄图像。以及，在拍照的瞬间，移动终端可显示第一预览图像。
可选地，在拍照完成后，移动终端可持续对副摄像头采集的副摄图像进行裁剪处理，以获得第二预览图像。其中，第二预览图像对应的视场角和第二主摄图像对应的视场角相同，且第二主摄图像的分辨率小于第一主摄图像的分辨率。以及，移动终端持续显示第二 预览图像。
例如，在拍照前或者拍照完成后，移动终端均可显示第二预览图像。以及，在拍照的瞬间，移动终端可显示第一预览图像。
因此，本申请实施例通过从视场角更大的副摄像头采集的副摄图像来进行视场角的裁剪，从而利用裁剪出的第一预览图像进行预览显示，从而在进入高分辨率拍照模式时，移动终端仍可显示画面，进而实现了预览画面的持续显示，提升了用户体验。
应理解，上述拍照预览方法仅是示例性的，本领域技术人员根据上述的方法可以进行各种变形，修改或变形之后的内容也在本申请保护范围内。
请参见图3，图3示出了本申请实施例提供的一种拍照预览装置300的结构框图，应理解，该拍照预览装置300与上述方法实施例对应，能够执行上述方法实施例涉及的各个步骤，该拍照预览装置300具体的功能可以参见上文中的描述，为避免重复，此处适当省略详细描述。该拍照预览装置300包括至少一个能以软件或固件(firmware)的形式存储于存储器中或固化在拍照预览装置300的操作系统(operating system，OS)中的软件功能模块。具体地，该拍照预览装置300应用于移动终端，移动终端包括主摄像头和副摄像头，副摄像头的视场角大于主摄像头的视场角，该拍照预览装置300可以包括：
获取模块310，可以被配置成用于获取拍摄指令；裁剪模块320，用于响应于拍摄指令，从副摄像头采集的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同；显示模块330，用于显示第一预览图像。
在一个可能的实施例中，获取模块310，还可以被配置成用于获取第二主摄图像，其中，第二主摄图像是主摄像头采集的或者对第一主摄图像进行压缩处理后获得的，且第二主摄图像的分辨率小于第一主摄图像的分辨率；显示模块330，还可以被配置成用于显示第二主摄图像。
在一个可能的实施例中，裁剪模块320，还可以被配置成用于持续对副摄像头采集的副摄图像进行裁剪处理，以获得第二预览图像，其中，第二预览图像对应的视场角和第二主摄图像对应的视场角相同，第二主摄图像的分辨率小于第一主摄图像的分辨率；显示模块330，还可以被配置成用于持续显示第二预览图像。
在一个可能的实施例中，该拍照预览装置300还可以包括调整模块(未示出)，该调整模块可以被配置成用于调整所述主摄像头的摄像参数和/或所述副摄像头的摄像参数，以使得所述主摄像头采集的第二主摄图像和所述副摄像头采集的副摄图像观感一致。
在一个可能的实施例中，摄像参数可以包括曝光、白平衡和聚焦中的任意一个或者多个。
在一个可能的实施例中，移动终端可以存储有第一主摄图像的顶点的坐标和副摄图像 中与第一主摄图像的顶点对应的目标点的坐标之间的映射关系，裁剪模块320可以被配置成用于：获取第一主摄图像的顶点的坐标；根据顶点的坐标和映射关系，确定目标点的坐标；根据目标点的坐标，从副摄图像中确定第一预览图像对应的目标区域的位置；根据目标区域的位置，从副摄图像中裁剪出第一预览图像。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的装置的具体工作过程，可以参考前述方法中的对应过程，在此不再过多赘述。
本申请实施例还提供一种电子设备，请参见图4，图4是本申请实施例提供的一种电子设备400的结构框图。电子设备400可以包括处理器410、通信接口420、存储器430和至少一个通信总线440。其中，通信总线440用于实现这些组件直接的连接通信。其中，本申请实施例中的通信接口420可以被配置成用于与其他设备进行信令或数据的通信。处理器410可以是一种集成电路芯片，具有信号的处理能力。上述的处理器410可以是通用处理器，包括中央处理器(CentralProcessingUnit，简称CPU)、网络处理器(NetworkProcessor，简称NP)等；还可以是数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(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。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器410也可以是任何常规的处理器等。
存储器430可以是，但不限于，随机存取存储器(RandomAccessMemory，RAM)，只读存储器(Read Only Memory，ROM)，可编程只读存储器(Programmable Read-Only Memory，PROM)，可擦除只读存储器(Erasable Programmable Read-Only Memory，EPROM)，电可擦除只读存储器(Electric Erasable Programmable Read-Only Memory，EEPROM)等。存储器430中存储有计算机可读取指令，当所述计算机可读取指令由所述处理器410执行时，电子设备400可以执行上述方法实施例中的各个步骤。
电子设备400还可以包括存储控制器、输入输出单元、音频单元、显示单元。
所述存储器430、存储控制器、处理器410、外设接口、输入输出单元、音频单元、显示单元各元件相互之间直接或间接地电性连接，以实现数据的传输或交互。例如，这些元件相互之间可通过一条或多条通信总线440实现电性连接。处理器410可以被配置成用于执行存储器430中存储的可执行模块。并且，电子设备400可以被配置成用于执行下述方法：获取拍摄指令；响应于拍摄指令，从副摄像头采集的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同；显示第一预览图像。
输入输出单元用于提供给用户输入数据实现用户与所述服务器(或本地终端)的交互。所述输入输出单元可以是，但不限于，鼠标和键盘等。
音频单元向用户提供音频接口，其可包括一个或多个麦克风、一个或者多个扬声器以及音频电路。
显示单元在所述电子设备与用户之间提供一个交互界面(例如用户操作界面)或用于显示图像数据给用户参考。在本实施例中，所述显示单元可以是液晶显示器或触控显示器。若为触控显示器，其可为支持单点和多点触控操作的电容式触控屏或电阻式触控屏等。支持单点和多点触控操作是指触控显示器能感应到来自该触控显示器上一个或多个位置处同时产生的触控操作，并将该感应到的触控操作交由处理器进行计算和处理。
可以理解，图4所示的结构仅为示意，所述电子设备400还可包括比图4中所示更多或者更少的组件，或者具有与图4所示不同的配置。图4中所示的各组件可以采用硬件、软件或其组合实现。
本申请还提供一种存储介质，该存储介质上可以存储有计算机程序，该计算机程序被处理器运行时执行方法实施例所述的方法。
本申请还提供一种计算机程序产品，所述计算机程序产品在计算机上运行时，使得计算机执行方法实施例所述的方法。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统的具体工作过程，可以参考前述方法中的对应过程，在此不再过多赘述。
需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。对于装置类实施例而言，由于其与方法实施例基本相似，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。
本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，也可以通过其它的方式实现。以上所描述的装置实施例仅仅是示意性的，例如，附图中的流程图和框图显示了根据本申请的多个实施例的装置、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分，所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。也应当注意，在有些作为替换的实现方式中，方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如，两个连续的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这依所涉及的功能而定。也要注意的是，框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行规定的功能或动作的专用的基于硬件的系统来实现，或者可以用专用硬件与计算机指令的组合来实现。
另外，在本申请各个实施例中的各功能模块可以集成在一起形成一个独立的部分，也可以是各个模块单独存在，也可以两个或两个以上模块集成形成一个独立的部分。
所述功能如果以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。
工业实用性
本申请提供了一种拍照预览方法、装置、存储介质和电子设备，该拍照预览方法包括：获取拍摄指令；响应于拍摄指令，从副摄像头采集的副摄图像中裁剪出第一预览图像，其中，第一预览图像对应的视场角和主摄像头采集的第一主摄图像对应的视场角相同；显示第一预览图像。本申请实施例通过从视场角更大的副摄像头采集的副摄图像来进行视场角的裁剪，从而利用裁剪出的第一预览图像进行预览显示，从而在进入高分辨率拍照模式时，移动终端仍可显示画面，进而实现了预览画面的持续显示，提升了用户体验。
此外，可以理解的是，本申请的一种拍照预览方法、装置、存储介质和电子设备是可以重现的，并且可以用在多种工业应用中。例如，本申请的拍照预览方法、装置、存储介 质和电子设备可以用于移动终端拍照的技术领域。

Claims (16)

  1. 一种拍照预览方法，其特征在于，所述拍照预览方法应用于移动终端，所述移动终端包括主摄像头和副摄像头，所述副摄像头的视场角大于所述主摄像头的视场角，所述拍照预览方法包括：
    获取拍摄指令；
    响应于所述拍摄指令，从所述副摄像头采集的副摄图像中裁剪出第一预览图像，其中，所述第一预览图像对应的视场角和所述主摄像头采集的第一主摄图像对应的视场角相同；
    显示所述第一预览图像。
  2. 根据权利要求1所述的拍照预览方法，其特征在于，在所述获取拍摄指令之前，或者在所述显示所述第一预览图像之后，所述拍照预览方法还包括：
    获取第二主摄图像，其中，所述第二主摄图像是所述主摄像头采集的或者对所述第一主摄图像进行压缩处理后获得的，且所述第二主摄图像的分辨率小于所述第一主摄图像的分辨率；
    显示所述第二主摄图像。
  3. 根据权利要求1或2所述的拍照预览方法，其特征在于，在所述获取拍摄指令之前，或者在所述显示所述第一预览图像之后，所述拍照预览方法还包括：
    持续对所述副摄像头采集的副摄图像进行裁剪处理，以获得第二预览图像，其中，所述第二预览图像对应的视场角和第二主摄图像对应的视场角相同，所述第二主摄图像的分辨率小于所述第一主摄图像的分辨率；
    持续显示所述第二预览图像。
  4. 根据权利要求3所述的拍照预览方法，其特征在于，在拍照前或者拍照完成后，所述移动终端显示所述第二预览图像，以及在拍照的瞬间，所述移动终端显示所述第一预览图像。
  5. 根据权利要求1至4中任一项所述的拍照预览方法，其特征在于，在所述获取拍摄指令之前，所述拍照预览方法还包括：
    调整所述主摄像头的摄像参数和/或所述副摄像头的摄像参数，以使得所述主摄像头采集的第二主摄图像和所述副摄像头采集的副摄图像观感一致。
  6. 根据权利要求5所述的拍照预览方法，其特征在于，所述摄像参数包括曝光、白平衡和聚焦中的任意一个或者多个。
  7. 根据权利要求1或5所述的拍照预览方法，其特征在于，所述移动终端存储有所述第一主摄图像的顶点的坐标和所述副摄图像中与所述第一主摄图像的顶点对应的目标点的 坐标之间的映射关系，所述从所述副摄像头采集的副摄图像中裁剪出第一预览图像包括：
    获取所述第一主摄图像的顶点的坐标；
    根据所述顶点的坐标和所述映射关系，确定所述目标点的坐标；
    根据所述目标点的坐标，从所述副摄图像中确定所述第一预览图像对应的目标区域的位置；
    根据所述目标区域的位置，从所述副摄图像中裁剪出所述第一预览图像。
  8. 一种拍照预览装置，其特征在于，所述拍照预览装置应用于移动终端，所述移动终端包括主摄像头和副摄像头，所述副摄像头的视场角大于所述主摄像头的视场角，所述拍照预览装置包括：
    获取模块，被配置成用于获取拍摄指令；
    裁剪模块，被配置成用于响应于所述拍摄指令，从所述副摄像头采集的副摄图像中裁剪出第一预览图像，其中，所述第一预览图像对应的视场角和所述主摄像头采集的第一主摄图像对应的视场角相同；
    显示模块，被配置成用于显示所述第一预览图像。
  9. 根据权利要求8所述的拍照预览装置，其特征在于，所述获取模块还被配置成用于获取第二主摄图像，其中，所述第二主摄图像是所述主摄像头采集的或者对所述第一主摄图像进行压缩处理后获得的，且所述第二主摄图像的分辨率小于所述第一主摄图像的分辨率；所述显示模块，还被配置成用于显示所述第二主摄图像。
  10. 根据权利要求8或9所述的拍照预览装置，其特征在于，所述裁剪模块还被配置成用于持续对所述副摄像头采集的副摄图像进行裁剪处理，以获得第二预览图像，其中，所述第二预览图像对应的视场角和第二主摄图像对应的视场角相同，所述第二主摄图像的分辨率小于所述第一主摄图像的分辨率；所述显示模块还被配置成用于持续显示所述第二预览图像。
  11. 根据权利要求10所述的拍照预览装置，其特征在于，在拍照前或者拍照完成后，所述移动终端显示所述第二预览图像，以及在拍照的瞬间，所述移动终端显示所述第一预览图像。
  12. 根据权利要求8至11中任一项所述的拍照预览装置，其特征在于，所述拍照预览装置还包括调整模块，该调整模块被配置成用于调整所述主摄像头的摄像参数和/或所述副摄像头的摄像参数，以使得所述主摄像头采集的第二主摄图像和所述副摄像头采集的副摄图像观感一致。
  13. 根据权利要求12所述的拍照预览装置，其特征在于，所述摄像参数包括曝光、白平衡和聚焦中的任意一个或者多个。
  14. 根据权利要求8或12所述的拍照预览装置，其特征在于，所述移动终端存储有所述第一主摄图像的顶点的坐标和所述副摄图像中与所述第一主摄图像的顶点对应的目标点的坐标之间的映射关系，所述裁剪模块被配置成用于：获取所述第一主摄图像的顶点的坐标；根据所述顶点的坐标和所述映射关系，确定所述目标点的坐标；根据所述目标点的坐标，从所述副摄图像中确定所述第一预览图像对应的目标区域的位置；根据所述目标区域的位置，从所述副摄图像中裁剪出所述第一预览图像。
  15. 一种存储介质，其特征在于，所述存储介质上存储有计算机程序，所述计算机程序被处理器运行时执行如权利要求1至7中任一所述的拍照预览方法。
  16. 一种电子设备，其特征在于，所述电子设备包括：处理器、存储器和总线，所述存储器存储有所述处理器可执行的机器可读指令，当所述电子设备运行时，所述处理器与所述存储器之间通过总线通信，所述机器可读指令被所述处理器执行时执行如权利要求1至7中任一所述的拍照预览方法。
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CN115334227B (zh) * 2022-10-18 2024-01-19 菲特（天津）检测技术有限公司 齿轮图像获取装置、方法及齿轮图像获取方法、电子设备

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