WO2019041230A1 - Procédé de photographie à recadrage carré, système de photographie, et appareil de photographie - Google Patents

Procédé de photographie à recadrage carré, système de photographie, et appareil de photographie Download PDF

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Publication number
WO2019041230A1
WO2019041230A1 PCT/CN2017/099919 CN2017099919W WO2019041230A1 WO 2019041230 A1 WO2019041230 A1 WO 2019041230A1 CN 2017099919 W CN2017099919 W CN 2017099919W WO 2019041230 A1 WO2019041230 A1 WO 2019041230A1
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Prior art keywords
camera
photographing
image data
square
size
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PCT/CN2017/099919
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English (en)
Chinese (zh)
Inventor
张学熙
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深圳传音通讯有限公司
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Priority to CN201780096317.1A priority Critical patent/CN111279679A/zh
Priority to PCT/CN2017/099919 priority patent/WO2019041230A1/fr
Publication of WO2019041230A1 publication Critical patent/WO2019041230A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • 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 present invention relates to the field of electronic application technologies, and in particular, to a square cropping photographing method, a photographing system, and a photographing apparatus based on photographing, having a function of echoing and not returning.
  • the camera is one of the basic applications in the smart phone. It is not only convenient and quick to take pictures with the smart phone camera, but also the image quality of the smart phone camera is better.
  • the camera functions of intelligent terminals in the market are becoming more and more abundant, such as eye mark recognition, night shot lighting, panorama, beauty and other third-party camera functions.
  • the implementation of these third-party camera functions is based on the three modes of preview, photographing and recording of the camera application itself.
  • This type of sharing mode easily causes the normal preview, photographing and recording effects of the smart terminal system to collide with the functions of the third-party camera application, and affects the debugging of the function effects of the third-party camera application. Therefore, in order to avoid the conflict between the normal preview, photographing, and recording functions of the smart terminal system's own camera application and the functions of the third-party camera application, a mode of processing that can separate the two is required.
  • the user needs to make multiple attempts to configure the shooting mode and shooting parameters of the mobile terminal, the shooting process is complicated, and the composition is not beautiful enough.
  • photography is also a text Ming's handprint.
  • Photography is the crystallization of the natural convergence between natural science and social science. It is a visual means of understanding, understanding and reflecting social reality. It is an art form with aesthetic value and a perfect combination of science and art.
  • the photographer brings beautiful enjoyment to the viewer, so that the viewer truly gets the satisfaction of the soul.
  • photography is not just about playing with the camera, but a comprehensive process that includes applied science, imagination and design, professional skills and organizational skills.
  • photography composition is usually the most profound concept in photography.
  • a large number of classifications such as parallel, vertical, diagonal, curved frame, etc., will make people feel overwhelmed when they think about composition.
  • Different compositions will shoot different works, for example 3:2 is the default scale mode of most cameras, while 16:9 is not exactly the widescreen movie scale mode, it is more suitable for using this at the moment.
  • the scale is shown on the display.
  • the aspect ratio of the camera interface in the portrait state of the smartphone is usually 3:4 or 9:16
  • the aspect ratio of the camera interface in the horizontal screen state is usually For 4:3 or 16:9
  • Squares are equal in length and width, and they give a feeling of stability and symmetry.
  • the square scale shooting mode consists of a square composition, but not a square composition. Based on the square shooting ratio, you can still apply the composition method of vertical lines, parallel lines, diagonal lines, curves, etc. again.
  • the square-scale shooting mode the most visual impact should be its own symmetrical photography.
  • a square camera function firstly a camera or a camera App
  • the camera mode is switched to the square camera mode, and the resolution sizes of the preview and the photo are set to a ratio of 1:1, then the camera stops previewing, then the camera starts previewing, and when previewing, data is acquired from the image sensor provided by the camera, and The preview image is cropped, and then the photographing command is sent, the camera executes and executes according to the photographing command, and at the same time, the image data obtained from the image sensor is cropped; when the image data needs to be converted into the image data of the jpeg format, the third party algorithm The image data of the yuv format is calculated and decompressed, and the image data of the jpeg format is fed back to the camera or the camera App, and the photographing ends.
  • the resolution size of the preview and the photographing are set to a ratio of 1:1, and in the mode of switching from the other proportional size to the 1:1 ratio mode, the preview size is changed, which inevitably leads to Stop the preview and then open the preview to give the customer a pause, which affects the customer's experience.
  • the object of the present invention is to provide a square cropping photographing method, a photographing system and a photographing device based on photographing and having a function of echoing and not echoing, by using an occlusion method in the display module while maintaining the image preview size resolution unchanged.
  • the square preview screen is displayed, and the resolution of the photograph size is changed to 1:1, so that the preview is not stopped, the square size image is taken, and the photographing performance is hardly affected, and the switching performance between the preview modes is greatly improved.
  • a square cropping photographing method includes the following process: switching a photographing mode to a square photographing mode. Set the camera size resolution to 1:1 ratio. At this time, the camera does not stop previewing. If the preview size resolution is unchanged, the preview screen size is blocked to 1:1 ratio; the camera command is issued, according to the The photographing instruction sets the postview size to a 1:1 ratio; the image data is cropped according to a preset image size of 1:1 ratio to obtain square image data; the square image data is transmitted to the camera; the camera displays corresponding The picture is stored and the photo is taken over.
  • the image data that is inconsistent with the preview screen size is discarded, and is not sent back to the camera for preview display.
  • the square cropping photographing further comprises the following process: the image data is yuv format data, wherein y represents brightness, u and v represent chromaticity; and the yuv data is encoded and compressed into jpeg according to a third-party algorithm. data.
  • converting the yuv data into jpeg data further comprises the step of converting the yuv data into rgb data, wherein the r represents red, the g represents green, and b represents blue. Copying each pixel corresponding to the rgb data, performing column and/or row interpolation on the rgb data according to the copied pixel, expanding the resolution corresponding to the rgb data to the preset resolution; interpolating The subsequent rgb data is encoded into image format jpeg data to display the image based on the jpeg data.
  • a second technical solution of the present invention is a photographing system, comprising: a client and a server suitable for executing the square cropping photographing method; the client is configured to switch a photographing mode, and set according to the selected photographing mode. Taking a photo size resolution and displaying a preview image and issuing a photographing instruction; the server receives the photographing instruction and sets a postview size according to the instruction, calls a camera provided by the client to take a photo, and stores the obtained image data, And cutting the image data according to a preset image size ratio to obtain image data matching the selected photographing mode; transmitting the square image data to the client; and displaying the corresponding image by the client.
  • the camera mode provided by the server includes: a standard camera mode, a square camera mode and a full-screen camera mode.
  • the server is provided with a camera application layer, a camera application framework layer, and a camera hardware abstraction layer for data interaction through respective issued callback commands;
  • the client switches the photographing mode to the square photographing mode to take a photo;
  • the size resolution is set to 1:1 ratio.
  • the camera does not stop previewing, and the preview screen size is blocked to 1:1 ratio when the preview size resolution is unchanged;
  • the camera application layer is used for selection according to the selection. Photographing mode to send a photo instruction;
  • the camera hardware abstraction layer is configured to receive the photo command and perform the following operations: if the photographing instruction is to take a photo in the square photographing mode, set the postview size to a 1:1 ratio; and call the image sensor of the camera to take a photograph;
  • the image data is cropped according to a preset image size of 1:1 ratio to obtain square image data, and the square image data is transmitted to the camera application layer through the camera frame layer; the camera application layer is used according to The square image data generates a corresponding picture and drives the client to display.
  • the server is further provided with a driving layer for storing image data collected by the image sensor.
  • the camera hardware abstraction layer is configured to discard part of the image data whose image data size is inconsistent with the preview size ratio, and does not send back to the client preview display; compress the retained square image data to generate image data in jpeg format and Feedback to the camera application layer, the client displays.
  • a third technical solution of the present invention is a photographing apparatus, comprising: a processor, a photographing mode module, a preview module, a photographing command sending module, a cropping module, a display module, and a photographing module for respectively performing data interaction by the processor.
  • the photographing mode module is configured to switch the photographing mode.
  • the preview module is configured to preview the photographing area according to the switching of the photographing mode; when photographing in the square photographing mode, the photographing size resolution is set to 1:1 ratio, and at this time, the preview screen does not stop, and the preview size is resolved. When the rate is constant, the preview screen size is masked to a 1:1 ratio.
  • the photographing command sending module is configured to send a photographing instruction; the photographing module receives the photographing instruction, sets a postview size to a 1:1 ratio according to the photographing instruction, and collects image data.
  • a cropping module configured to cut image data collected by the camera module according to a preset image size of 1:1, obtain square image data, and feed the square image data to the display module for display.
  • the invention displays a square preview screen in the display module by using occlusion while keeping the image preview size resolution unchanged, and changes the photo size resolution to 1:1, so as not to stop the preview and shoot the square size.
  • the picture while keeping the camera performance almost unaffected, greatly improves the switching performance between preview modes. Provide customers with a better functional performance experience.
  • a third-party algorithm sensitive to the positional offset of the original resolution size of 4:3 or 16:9 is used for processing, and there is no need to separately consider the 1:1 ratio.
  • the third-party algorithm processing in the scene mode can be used normally without any modification and modification, and is convenient for image data conversion.
  • the preview function in 1:1 ratio has unnecessary processing, which can greatly reduce the control system program.
  • the logical complexity if there is a photo mode with echo function and a photo mode with no echo function, the preview function in 1:1 ratio has unnecessary processing, which can greatly reduce the control system program. The logical complexity.
  • FIG. 3 is a schematic diagram of a square cropping photographing method based on photographing and having a function of echoing and not returning a flowchart for generating a photographing command;
  • FIG. 4 is a flow chart of an embodiment of a photographing process of a square cropping photographing method based on photographing and having an echo-returning function
  • FIG. 5 is a flowchart of another embodiment of a photographing process of a square cropping photographing method based on photographing and having an echo-returning function
  • FIG. 6 is a schematic diagram of a selective photographing mode of a mobile terminal based on a square cropping photographing method with a photographing back echoing function
  • FIG. 7 is a schematic diagram of a general full-screen photographing mode of a mobile terminal based on a square cropping photographing method with a photo-returning and non-returning function;
  • FIG. 8 is a schematic diagram of previewing a square photographing mode of a mobile terminal based on a square cropping photographing method with a photo-returning and non-returning function;
  • FIG. 9 is a schematic structural diagram of a photographing apparatus for a square cropping photographing method based on a photo-returning and non-returning function according to the present invention.
  • the initiator finds the resources of the camera application in the camera application layer, obtains the startup entry, and sequentially executes the Java code in the virtual machine for parsing and execution, and sequentially calls the interface of the camera frame layer, the interface and the driver layer of the camera hardware abstraction layer in the execution process. Drive interface.
  • the camera application layer is a program written in the Java language and running on the camera virtual machine. Enabling the camera app requires launching the camera virtual machine.
  • the hardware abstraction layer that is, the underlying system, may be a package for the hardware device camera operation interface of the system, providing an interface upward, and shielding the underlying implementation details.
  • the camera framework layer includes the Camera API (Application Programming Interface) and the CameraService (Camera Server).
  • the camera system is provided with a client and a server.
  • the code of the camera framework layer is running on the client, and the code of the camera service and the interface of the HAL include the implementation code running on the server.
  • the camera server is a background service In the server process, he provides an interface for the client to operate the camera. Since the characteristics of the camera are exclusive hardware devices, the real owner of the camera should be the server rather than the client. The client can only operate the camera device through the server. Parameters and other information should be saved on the server. Since the characteristics of the server are to allow multiple clients to be connected at the same time, whether the specific server can support the specific implementation, and whether the detailed features of multiple cameras can be used at the same time depends on the specific implementation.
  • the camera application layer issues a corresponding photographing instruction (take picture instruction), which is transmitted to the camera hardware abstraction layer via the Camera API and CameraService of the camera frame layer.
  • take picture instruction a photographing instruction
  • the camera hardware abstraction layer receives the photographing instruction
  • the camera is called to take a photo
  • the driving layer saves the image data collected by the camera.
  • the camera hardware abstraction layer of the mobile terminal acquires image data collected by the camera from the driver layer, and transmits the image data to the camera application layer via the Camera API and the CameraService of the camera frame layer, and the camera application layer generates and displays the image data according to the image data.
  • the corresponding picture The camera hardware abstraction layer of the mobile terminal acquires image data collected by the camera from the driver layer, and transmits the image data to the camera application layer via the Camera API and the CameraService of the camera frame layer, and the camera application layer generates and displays the image data according to the image data. The corresponding picture.
  • the present invention is a square cropping photographing method based on photographing and having echo-returning function, and further includes the following process:
  • a square cropping photographing method comprising the following process: switching the photographing mode to the square photographing mode; setting the photographing size resolution to a 1:1 ratio, at this time, the camera does not stop the preview, and the preview size resolution is unchanged. , the preview screen size is blocked to a 1:1 ratio; a photographing instruction is issued, and the postview size is set to a 1:1 ratio according to the photographing instruction; the image data is cropped according to a preset image size of 1:1 ratio, and obtained Square image data; the square image data is transmitted to the camera; the camera displays the corresponding picture and stores it, and the photographing ends.
  • the camera does not need to go through the process of closing the preview and then re-previewing for a delay time, but the upper and lower occlusion modes are used on the screen to make the standard preview image into a square preview image, that is, the camera preview mode is from the standard.
  • the camera preview mode does not stop while other preview modes switch to square preview mode or switch from square preview mode to other preview modes such as standard.
  • the image data that is inconsistent with the preview screen size is discarded, and is not sent back to the camera for preview display.
  • the square cropping photograph also includes the following process: the image data is yuv format data, wherein y represents brightness, u and v represent chromaticity; and the yuv data is edited according to a third-party algorithm
  • the code is compressed into jpeg data.
  • converting the yuv data into jpeg data further includes the following process of converting the yuv data into rgb data, wherein the r represents red, the g represents green, and b represents blue . Copying each pixel corresponding to the rgb data, performing column and/or row interpolation on the rgb data according to the copied pixel, expanding the resolution corresponding to the rgb data to the preset resolution; interpolating The subsequent rgb data is encoded into image format jpeg data to display the image based on the jpeg data.
  • the present invention further discloses a photographing system, comprising: a client and a server for performing the square cropping photographing method according to the first embodiment; the client is used for switching a photographing mode, and setting a photographing size resolution according to the selected photographing mode and displaying a preview screen and issuing a photographing instruction; the server receiving the photographing instruction and setting a postview size according to the instruction, calling the client to set The camera performs photographing, and stores the obtained image data, and trims the image data according to a preset image size ratio to obtain image data matching the selected photographing mode; and transmits the square image data to the client The client displays the corresponding picture.
  • the photographing instruction is sent by the camera application layer, and the photographing instruction is transmitted to the camera hardware abstraction layer via the Camera API and the CameraService of the camera frame layer; the camera hardware The abstraction layer receives the above-mentioned photographing command and forces the postview size set therein to be set to a size of 1:1.
  • the camera hardware abstraction layer calls the image sensor (sensor end) of the camera to take a photo, and saves the Buffer image data collected by the image sensor through the driving layer.
  • the camera hardware abstraction layer captures the Buffer image data acquired by the image sensor from the driver layer according to the matching cropping algorithm, and directly cuts the image size according to the preset 1:1 ratio to obtain square image data.
  • the camera hardware abstraction layer transmits the square image data to the camera application layer via the camera framework Camera API and CameraService according to the callback command issued by the application layer, and the camera application layer generates and displays the corresponding image according to the image data, and the photographing ends.
  • the camera hardware when the square image data is fed back to the camera application layer, the camera hardware is drawn. If the size of the image display data (postview buffer) does not match the preview size ratio, the image data of the inconsistent portion is directly discarded when feeding back to the camera application layer, and is not returned to the preview display; the retained main image The main buffer is fed back to the camera application layer.
  • the photographing mode of the camera or the camera App includes, but is not limited to, a standard photographing mode, a square photographing mode, and a full-screen photographing mode.
  • FIG. 7 is a schematic diagram of preview display of a camera or camera App set on a mobile terminal product to select a general full-screen camera mode; as can be seen from the figure, a preview in a full-screen camera mode is required.
  • the preview image of the photographed area occupies the size of the screen provided by the entire mobile terminal.
  • FIG. 8 is a schematic diagram showing a preview image display of a selection of a square photographing mode of a mobile terminal based on a square cropping photographing method with a photo-returning non-return function;
  • the width of the screen corresponds to the width of the square image, which is based on the value of the screen width, and the width is equal to the height of the image to occlude the rest of the preview image.
  • the diagonal stripe portion shown in FIG. 8 is the portion that needs to be occluded. So that the preview image looks the same on the surface as the size of the square image you need.
  • the photographing method described in the first embodiment is used in the image data stored in the yuv format obtained in the first embodiment.
  • the main image data (main buffer) needs to be processed by a third-party algorithm, that is, the image data storage format conversion is performed on the square image data by a third-party algorithm.
  • the image data collected by the image sensor is yuv data, where y represents brightness, and u and v represent chromaticity
  • the camera hardware abstraction layer acquires yuv data from the driver layer
  • the camera hardware abstraction layer according to the yuv data
  • the three-party algorithm encodes and compresses into jpeg data, and transmits the jpeg data to the camera application layer via the Camera API and CameraService of the camera frame layer, and the camera application layer generates and displays the corresponding image according to the jpeg data. Then the photo ends.
  • yuv data is primarily used to optimize the transmission of color video signals, making them backward compatible with older black and white televisions.
  • RGB requires three independent video signals to be transmitted simultaneously.
  • y means brightness (Luminance or Luma), which is the grayscale value; and "u” and “v” represent chromaticity (Chrominance or Chroma), which is used to describe the color and saturation of the image.
  • Brightness is established by RGB input signals by superimposing specific parts of the RGB signal together.
  • Chroma defines two aspects of color - hue and saturation, represented by Cr and Cb, respectively. Among them, Cr reflects the difference between the red part of the RGB input signal and the brightness value of the RGB signal.
  • Cb reflects the difference between the blue portion of the RGB input signal and the luminance value of the RGB signal.
  • the yuv color space The importance of using the yuv color space is that its luminance signal y and chrominance signals u, v are separated. If there are only y signal components and no u, v components, then the image thus represented is a black and white grayscale image.
  • the color TV adopts the yuv space in order to solve the compatibility problem between the color television and the black and white television with the luminance signal y, so that the black and white television can also receive the color television signal.
  • the present invention further discloses a photographing apparatus, comprising: a processor 100, a photographing mode module 107 for interacting with the processor 100 respectively, previewing The module 108, the photographing command sending module 109, the cropping module 110, the photographing module 111, the memory 102, the transmission interface 103, the audio component 104, the sensor component 105 and the manipulation interface 106.
  • the processor 100 is configured to control overall operations of the camera device, such as display, storage, data transmission, camera operation, and the like.
  • the photographing mode module 107 includes standard, square, full-screen and the like photographing modes; the photographing mode can be selected through the manipulation interface 106.
  • the photographing module 111 is configured to take a photo by using the configured photographing mode and the photographing parameter when receiving the photographing instruction.
  • the memory 102 is configured to save the captured photo in association with the corresponding shooting parameter.
  • Sensor assembly 105 which includes, but is not limited to, a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the image sensor is a core component of the camera.
  • the audio component 104 is configured to output and/or input an audio signal.
  • the audio component 104 includes a microphone that is configured to receive an external audio signal when the camera device is in an operational mode, such as a voice-activated camera mode, a call mode, a recording mode, and a voice recognition mode.
  • the received audio signal may be further stored in the memory 102 or controlled by the processor 100 to take a picture.
  • the audio component 104 also includes a speaker for outputting an audio signal.
  • the transmission interface 103 is configured to transmit image data by connecting to an external device by wire and/or wirelessly.
  • the camera device described above is further provided with a power module 101 that provides power to various components or modules of the camera device.
  • the control interface 106 is configured to facilitate human-computer interaction, perform photographing setting parameters, and the like, and further includes a display module for receiving image data and displaying the same in the manipulation interface 106.
  • the preview module 108 is configured to preview the photographed area as the photographing mode changes, and also set the preview size resolution.
  • the photographing command sending module 109 is configured to send a photographing command to the photographing module 111 after the shooting mode and the preview resolution are set, and the shooting parameters are all set.
  • the cropping module 110 is configured to: after the camera module 111 calls the sensor component 105 to take a photo, the obtained image data is cropped, and the cropped image data is fed back to the memory 102 for storage, or fed back to the display module, through the control interface. Display.
  • the photographing command sending module sends a photographing instruction; the photographing module receives the photographing instruction, sets a postview size to a 1:1 ratio according to the photographing instruction, and collects image data.
  • the cropping module cuts the image data collected by the camera module according to a preset image size of 1:1 ratio, obtains square image data, and feeds back the square image data to the display module to display through the control interface. .
  • the present invention uses the occlusion method to make the preview image look square when the preview size resolution is unchanged, and only changes the photo size resolution to 1:1, so that the preview does not need to be stopped. It is also possible to take a square-sized photograph, and the switching performance between the preview modes can be greatly improved in the case where the photographing performance is slightly reduced or hardly affected.
  • the postview size is forced to be changed to a 1:1 ratio at the bottom layer, and then the buffer data from the sensor end is directly cut according to the new cropping algorithm.
  • the ratio of 1:1, for the postview buffer is inconsistent with the preview size ratio, it is directly discarded when the corresponding data is returned to the upper layer; and for the main buffer to perform third-party algorithm processing on the clipped data buffer, third-party algorithm processing is performed. Otherwise, no processing is done, and finally the compressed jpeg data is returned to the camera application layer.
  • the camera service is provided with the camera mode of the echo function, in addition to setting the preview function under the 1:1 ratio by the present invention, it is unnecessary to perform unnecessary processing on the camera mode of the echo function. Significantly reduce the logic complexity of the control system program. If the camera service does not have the photographing mode of the echo function, the photographing mode can also be selected by the present invention, and the preview parameters are set. The applicability of the invention is relatively good.
  • the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, can be embodied in the form of a software product that can be stored in a storage medium (such as ROM/RAM, disk).
  • the optical disc includes a plurality of instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in various embodiments of the present invention.

Abstract

L'invention concerne un procédé de photographie à recadrage carré, un système de photographie, et un appareil de photographie basés sur une photographie avec écho et sans la nécessité d'une fonction d'écho. Le procédé comprend les étapes consistant à : commuter un mode de photographie d'un client dans un système de photographie à un mode de photographie carrée ; définir une résolution de taille de photographie à un rapport de 1:1, et bloquer une résolution de taille de prévisualisation à un rapport de 1:1 ; émettre une instruction de photographie au moyen d'une couche d'application d'appareil photo, et définir une taille de post-vue à un rapport de 1:1. Une couche d'abstraction matérielle d'appareil photo invoque un capteur d'image pour une photographie, et enregistre des données d'image collectées par le capteur d'image au moyen d'une couche pilote. La couche d'abstraction matérielle d'appareil photo recadre, selon un rapport de taille d'image prédéfini de 1:1, les données d'image acquises à partir de la couche pilote. La couche d'abstraction matérielle d'appareil photo transmet des données d'image carrée à la couche d'application d'appareil photo. La couche d'application d'appareil photo génère et affiche l'image correspondante. La présente invention permet de prendre une photo d'une taille carrée sans arrêter une prévisualisation, ce qui améliore les performances de commutation entre des modes de prévisualisation.
PCT/CN2017/099919 2017-08-31 2017-08-31 Procédé de photographie à recadrage carré, système de photographie, et appareil de photographie WO2019041230A1 (fr)

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PCT/CN2017/099919 WO2019041230A1 (fr) 2017-08-31 2017-08-31 Procédé de photographie à recadrage carré, système de photographie, et appareil de photographie

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