WO2019072126A1 - 基于二维码扫描识别的全过程音视频记录***及使用方法 - Google Patents

基于二维码扫描识别的全过程音视频记录***及使用方法 Download PDF

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Publication number
WO2019072126A1
WO2019072126A1 PCT/CN2018/108968 CN2018108968W WO2019072126A1 WO 2019072126 A1 WO2019072126 A1 WO 2019072126A1 CN 2018108968 W CN2018108968 W CN 2018108968W WO 2019072126 A1 WO2019072126 A1 WO 2019072126A1
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dimensional code
video
audio
image
law enforcement
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PCT/CN2018/108968
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English (en)
French (fr)
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邵敏强
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南京百利通信息技术有限责任公司
邵敏强
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Publication of WO2019072126A1 publication Critical patent/WO2019072126A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
    • G06K7/1417—2D bar codes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark

Definitions

  • the invention belongs to the technical field of law enforcement equipment, in particular to a full-range audio and video recording system based on two-dimensional code scanning and identification and a using method thereof.
  • QR codes can be divided into two categories:
  • Stacked QR code based on one-dimensional barcode, multiple barcodes are stacked together for encoding. Common coding standards are PDF417;
  • the other is a matrix two-dimensional bar code represented by QR.
  • Matrix type two-dimensional code the information is represented by black and white squares in a matrix space, the black squares represent 1 and the white squares represent 0.
  • the corresponding combination represents a series of information, common coding
  • the standard has a QR code.
  • QR codes for encoding and decoding.
  • the QR code not only has large information capacity, high reliability, low cost, fast response, but also can display various text information such as Chinese characters and images, and its security is strong. And it is very convenient to use.
  • the QR code is divided into 40 versions.
  • the version 1 consists of 21x21 blocks. Each version adds 4 blocks.
  • the version 40 consists of 177x177 blocks. With each additional version, the amount of information that can be stored by the QR code increases.
  • the law enforcement recorder commonly used in the market can only realize functions such as photographing, video recording, recording, intercom, wireless network transmission, etc.
  • the photographed photos, audio and video files, recording files and other resources can be stored centrally in the collection workstation, or stored to In a unified storage device, if the user needs to call the photo of the law enforcement recorder, audio and video files and recording files, the audio and video files stored in the storage device can be called by calling on the collection workstation or by WEB.
  • the video of the law enforcement recorder can be randomly leaked to the unauthorised Internet, WeChat, Weibo and other media by directly playing back photos, audio and video files and recording files in the law enforcement recorder.
  • the leaked resources cannot be traced back to the source by effective means; the photos, audio and video files, and audio files of the law enforcement recorder can be processed, copied and cut once they are collected on the collection workstation or saved to the storage settings; At the time of the instrument, the video can be remake and leaked and cannot be traced back.
  • the video files stored in the memory card are also hidden and modified.
  • the problem to be solved by the present invention is to provide a unique identifier having an audio and video file during playback of an audio and video file, and after the audiovisual file is remake or leaked, it can be traced from the unique identification information.
  • the solution adopted by the present invention is: the full-process audio and video recording system based on the two-dimensional code scanning and identification, including a background application service system and a law enforcement recorder, and an external terminal, wherein the external terminal passes a wireless network or a wired network connection background application service system, generating a two-dimensional code on the external terminal;
  • the law enforcement recorder includes a photographing device, and further includes a two-dimensional code recognition unit, a two-dimensional code mark display unit, and a video sound Video file processing unit;
  • the two-dimensional code identifying unit is configured to identify string information included in the two-dimensional code image
  • the two-dimensional code mark display unit is configured to display a mark indicating successful recognition or a sound prompt on the display screen during video previewing and recording of the display screen of the photographing device after the two-dimensional code scan is successfully recognized. Marked successfully;
  • a video audio and video file processing unit configured to uniquely associate the character string information of the two-dimensional code image with the video audio file
  • a collection workstation coupled to the background application business system, the law enforcement recorder being coupled to the collection workstation.
  • the law enforcement recorder can identify the character string information included in the two-dimensional code, and the information contained in the two-dimensional code image has the user, the use time, and the law enforcement record event or pass The information contained in the two-dimensional code image can be traced back to the information; the character string information contained in each two-dimensional code has uniqueness, particularity, and designation, and the information contained in the two-dimensional code image has users, usage time, and
  • the law enforcement record event that is, the two-dimensional code can form a unique correspondence with the law enforcement recorder, so that the display unit is marked by the two-dimensional code, and after the two-dimensional code scan is successfully recognized, the video preview on the display screen of the photographing device and During the recording process, the display indicates that the recognition is successful or the voice prompt is successfully marked, and the string information is uniquely associated with the video and audio file through the video audio file processing unit, and the audio and video file is remake.
  • the traceability of the unique identification information can be traced from which law enforcement recorder or operator
  • the audio and video files, picture files and recording files in the law enforcement recorder are read by the collection workstation and uploaded to the collection workstation, and automatically uploaded to the audio and video resource dedicated storage device by the collection workstation.
  • the application can be applied.
  • the client of the system queries the law enforcement record generated by the law enforcement action, and can also see all the law enforcement audio and video files taken during the law enforcement record.
  • the two-dimensional code identification unit has a pre-processing sub-unit and a decoding sub-unit; wherein the pre-processing sub-unit is used for image extraction, and the acquired two-dimensional code image is grayed out to reduce the amount of data;
  • the decoding subunit is used for two-dimensional codeword word extraction, error correction decoding, and information decoding.
  • the collection workstation is connected to an audio and video resource dedicated storage device.
  • the external terminal generates a two-dimensional code through client software on the terminal.
  • Another problem to be solved by the present invention is to provide a full-process audio and video recording method based on two-dimensional code scanning recognition, including the following steps:
  • step (1) identifying the two-dimensional code image in the step (1), after identifying the character string information included in the two-dimensional code, displaying on the display screen during video preview and recording of the display screen of the photographing device Identify successful tags or mark them successfully by voice prompts;
  • the two-dimensional code image in the above method contains information, such as the user, the use time, and the law enforcement record event, or the information contained in the two-dimensional code image, which can be traced back to the information;
  • the identification function of the law enforcement recorder and collection workstation, storage device and background application business system will trace the entire process of audio and video throughout the law enforcement process.
  • the two-dimensional code in the step (1) is a QR code two-dimensional code.
  • the identification of the two-dimensional code image includes a pre-processing and decoding step; wherein the specific method of the pre-processing step is:
  • the first step gray-scale processing the two-dimensional code image acquired by the image acquisition device, reducing the amount of data, reducing the storage space and image processing time;
  • the second step using median filtering to remove the noise points introduced when acquiring the 2D barcode image, and reducing the interference of noise on subsequent image processing;
  • the third step barcode recognition only needs to obtain the shallow and shallow module information in the barcode image, so the image needs to be binarized after filtering, and the algorithm of adaptive illumination equalization and Otsu global threshold is used to perform the two-dimensional barcode image. Binarization, removing the influence of uneven illumination of the bar code image;
  • the fourth step realizing the 2D barcode positioning, obtaining the tilt angle of the barcode and the four control vertices, cutting the region where the 2D barcode is located from the whole image, preparing for the rotation and geometric distortion correction of the subsequent barcode, reducing the subsequent image Processing range, speed up image processing;
  • Step 5 Rotate the image to a horizontal state according to the tilt angle of the barcode obtained in the fourth step;
  • the sixth step realizing the geometric distortion correction of the two-dimensional barcode, and obtaining a relatively regular barcode image
  • Step 7 QRcode two-dimensional code establishes a sampling grid according to the position detection pattern and the position information of the correction pattern, and prepares for the codeword extraction of the QRcode two-dimensional code;
  • QRcode two-dimensional codeword extraction is to sample the intersection of the sampling grid, the dark color is recorded as 0, and the light color is recorded as 1, the codeword sequence of the QRcode two-dimensional code can be obtained;
  • the decoding step includes two-dimensional codeword word extraction, error correction decoding, and information decoding.
  • the watermark overlay, the encrypted transmission and the authorization processing are performed on the audio and video files.
  • FIG. 1 is a simplified schematic diagram of a full-process audio and video recording system based on two-dimensional code scanning recognition
  • Figure 2 is a simplified schematic diagram of the law enforcement recorder
  • FIG. 3 is a flow chart showing the specific use of the full-process audio and video recording system based on the two-dimensional code scanning recognition of the present invention in FIG. 1;
  • 1- law enforcement recorder 2-photographing device; 3-two-dimensional code recognition unit; 301-preprocessing sub-unit; 302-decoding sub-unit; 4--dimensional code mark display unit; 5--video audio and video file processing Unit; 6-background application service system; 7-external terminal; 8-collection workstation; 9-storage device.
  • the law enforcement recorder 1 of the present invention includes a photographing device 2, which can be used to scan a two-dimensional code image by using a camera on the photographing device 2, and a two-dimensional code recognition unit 3 for recognizing two-dimensional
  • the character string information included in the code image the two-dimensional code identification unit is configured to identify the character string information included in the two-dimensional code image, and the information contained in the two-dimensional code image has a user, a use time, and a law enforcement record event. ;
  • a two-dimensional code mark display unit 4 for displaying the character string information recognized by the two-dimensional code recognition unit 3 on the audio and video preview and recording interface captured by the photographing device 2;
  • the video audio and video file processing unit 5 is configured to uniquely associate the character string information with the video audio file.
  • the two-dimensional code identification unit 3 has a pre-processing sub-unit 301 and a decoding sub-unit 302.
  • the pre-processing sub-unit 301 is used for image extraction, and the acquired two-dimensional code image is grayed out to reduce the amount of data.
  • the decoding sub-unit 302 is used for two-dimensional code code word extraction, error correction decoding, and information decoding.
  • the above-mentioned law enforcement recorder 1 belongs to a part of the law enforcement recording system based on two-dimensional code scanning recognition of the present invention. As shown in FIG. 1 , it is a full-range audio and video recording system based on two-dimensional code scanning and recognition of the present invention, including a background application service system. 6 and the law enforcement recorder 1, further comprising an external terminal 7, the external terminal 7 is connected to the background application service system 6 via a wireless network or a wired network, and the external terminal 7 generates a two-dimensional code through the client software on the terminal 7; Also included is a collection workstation 8 connected to the background application service system 6, the law enforcement recorder 1 being connected to the collection workstation 8; the collection workstation 8 being connected to an audio and video resource dedicated storage device 9.
  • the external terminal 7 may be a terminal such as a smart phone, a PC, a tablet computer, etc.
  • the law enforcement recorder 1 in this embodiment re-develops and increases its function by modifying the underlying main chip of the law enforcement recorder 1
  • the camera lens capable of utilizing the law enforcement record is used to scan the two-dimensional code images generated by the existing types of terminals, and the string information contained in the two-dimensional code is identified.
  • the specific use method is: through the external terminal 7, using a local area network, a wide area network or 2G/3G/4G and other network communication means to access the login law enforcement record system, input law enforcement personnel, law enforcement recorder device number, law enforcement start time and other information, so that The external terminal 7 generates a two-dimensional code image of a specific law enforcement process number, and the information of the two-dimensional code image includes the user, the use time, and the law enforcement record event, and uses the law enforcement recorder 1 to scan and recognize the two-dimensional code information of the external terminal 7; After the two-dimensional code information, the law enforcement recorder 1 starts the law enforcement video recording, and the two-dimensional code information is uniquely associated with the video video; after the video recording is completed, the law enforcement recorder 1 is connected to the collection workstation 8, and the collection station 8 The audio and video files, picture files and recording files in the law enforcement recorder 1 are uploaded to the collection workstation 8, and automatically uploaded to the audio and video resource dedicated storage device 9 by the collection workstation 8, and the application system can be applied in the background
  • FIG. 3 it is a specific use flow chart of the law enforcement recording system based on the two-dimensional code scanning identification of the present invention:
  • the first step the external terminal connects the background application business system to generate a law enforcement record, and simultaneously generates a two-dimensional code of the law enforcement record;
  • Step 2 The law enforcement recorder scans the QR code and establishes a unique association with each audio and video file of the law enforcement record event;
  • the third step the law enforcement recorder uploads the audio and video files, the recording files, the picture files, the log files to the collection workstation, and the collection workstation simultaneously charges the law enforcement recorder;
  • the fourth step the collection workstation collects the above-mentioned files of the plurality of law enforcement recorders, and then saves the classification to the collection software back-end system, and collects the back-end system WEB-side management terminal for management and retrieval;
  • Step 5 The watermark encryption authorization system calls the audio and video resources in the background system of the acquisition software, and performs watermark superposition, encryption transmission and authorization processing on the audio and video when the application system calls the audio and video in the background;
  • the authorization function is enabled, and the log functions such as related and traceable records are generated;
  • the related resources are saved in the background system of the collection software, and the WEB management terminal of the background system is collected for unified management;
  • Step 6 After the video is processed in the fifth step, the background application service system makes a call and displays it in the system for playing and querying;
  • Step 7 For the local business system client or the authorized user of the remote non-local system, the resource call or query can be performed;
  • the specific full-process audio and video recording method based on two-dimensional code scanning identification includes the following steps:
  • the two-dimensional code in the step (1) is a QR code two-dimensional code.
  • the identification of the two-dimensional code image includes a pre-processing and decoding step; wherein the specific method of the pre-processing step is:
  • the first step gray-scale processing the two-dimensional code image acquired by the image acquisition device, reducing the amount of data, reducing the storage space and image processing time;
  • the second step using median filtering to remove the noise points introduced when acquiring the 2D barcode image, and reducing the interference of noise on subsequent image processing;
  • the third step barcode recognition only needs to obtain the shallow and shallow module information in the barcode image, so the image needs to be binarized after filtering, and the algorithm of adaptive illumination equalization and Otsu global threshold is used to perform the two-dimensional barcode image. Binarization, removing the influence of uneven illumination of the bar code image;
  • the fourth step realizing the 2D barcode positioning, obtaining the tilt angle of the barcode and the four control vertices, cutting the region where the 2D barcode is located from the whole image, preparing for the rotation and geometric distortion correction of the subsequent barcode, reducing the subsequent image Processing range, speed up image processing;
  • Step 5 Rotate the image to a horizontal state according to the tilt angle of the barcode obtained in the fourth step;
  • the sixth step realizing the geometric distortion correction of the two-dimensional barcode, and obtaining a relatively regular barcode image
  • Step 7 QRcode two-dimensional code establishes a sampling grid according to the position detection pattern and the position information of the correction pattern, and prepares for the codeword extraction of the QRcode two-dimensional code;
  • QRcode two-dimensional codeword extraction is to sample the intersection of the sampling grid, the dark color is recorded as 0, and the light color is recorded as 1, the codeword sequence of the QRcode two-dimensional code can be obtained;
  • the decoding step includes two-dimensional codeword word extraction, error correction decoding, and information decoding.
  • the above method realizes traceable recording of audio and video throughout the law enforcement process through a law enforcement recorder and a collection workstation, a storage device and a background application service system capable of realizing the two-dimensional code scanning and recognition function.
  • the string information contained in the QR code After identifying the string information contained in the QR code, it is displayed on the audio and video preview and recording interface of the law enforcement recorder. After the law enforcement recorder starts recording, the string information can be uniquely associated with the video audio file. Since the character string information generated by the two-dimensional code generated by each type of terminal has uniqueness, particularity, and designation, in the playback process of the audio and video file, the unique identifier of the most audio and video file can be remake in the audio and video file. Or, after the leak, the string information can be traced from which law enforcement recorder leaked or the operator.

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Abstract

本发明公开一种基于二维码扫描识别的全程音视频记录***及使用方法，该***有后台应用业务***和执法记录仪，外部终端通过无线网络或者有线网络连接后台业务应用***，所述外部终端生成二维码；录像音视频文件处理单元，用于将字符串信息与录像音视频文件进行唯一性关联；还包括有与所述后台应用业务***相连接的采集工作站，所述执法记录仪与所述采集工作站相连接。在所述拍摄装置的显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功，在该音视频文件被翻拍或者泄露后，能通过该唯一标识信息追溯是从哪一个执法记录仪或者操作人员泄露，因此在采用执法记录的应用行业有广泛的实际需求。

Description

基于二维码扫描识别的全过程音视频记录***及使用方法 技术领域
本发明属于执法设备技术领域，尤其是一种基于二维码扫描识别的全程音视频记录***及使用方法。
背景技术
从形成方式上，二维码可以分为两类：
(1)堆叠式二维码：在一维条形码的基础上，将多个条形码堆积在一起进行编码，常见的编码标准有PDF417等；
另外的就是以QR为代表的矩阵式二维条码。
(2)矩阵式二维码：在一个矩阵空间中通过黑色和白色的方块进行信息的表示，黑色的方块表示1，白色的方块表示0，相应的组合表示了一系列的信息，常见的编码标准有QR码，
目前很多的应用都是用QR码进行编码，译码，QR码不仅信息容量大、可靠性高、成本低、响应速度快，还可表示汉字及图像等多种文字信息、其保密防伪性强而且使用非常方便。
目前使用最广的是QR码，QR码分为40个版本，版本1由21x21个方块组成，每个版本增加4个方块，版本40由177x177个方块组成。每增加一个版本，QR码可储存的信息数量也随之增多。
目前，市场上常用的执法记录仪只能实现拍照、摄像、录音、对讲、无线网络传输等功能，拍摄的照片，音视频文件、录音文件等资源可以集中存储到采集工作站中，或者存储到一个统一的存储设备中，如果使用单位需要调用执法记录仪的照片，音视频文件、录音文件，可以通过在采集工作站上调用，或者通过WEB方式调用统一保存在存储设备中的音视频文件。在实际使用过程中，执法记录仪的视频可以通过直接在执法记录仪中回放照片、音视频文件、录音文件的方式被随意泄露传播到非授权的互联网、微信、微博等媒体中，且被泄露的资源无法通过有效手段进行追溯来源；执法记录仪的照片、音视频文件、录音文件，一旦集中到采集工作站上或者保存到存储设置中，可以被随意处理，拷贝剪切；单独操作执法记录仪的时候，视频可以被翻拍被泄露无法追溯。执法记录仪在使 用过程中，由于存储卡可以热插拔，保存在存储卡中的视频文件也存在被随意被删除、修改的隐患。
发明内容
本发明要解决的问题是提供一种在音视频文件的回放过程中，具有音视频文件的唯一标识，在该音视频文件被翻拍或者泄露后，能通过该唯一标识信息追溯是从哪一个执法记录仪泄露的基于二维码扫描识别的全过程音视频记录***。
为解决上述技术问题，本发明采用的方案是：该基于二维码扫描识别的全过程音视频记录***，包括有后台应用业务***和执法记录仪，还包括有外部终端，所述外部终端通过无线网络或者有线网络连接后台应用业务***，在所述外部终端上生成二维码；所述执法记录仪包括有拍摄装置，还包括有二维码识别单元、二维码标记显示单元和录像音视频文件处理单元；
所述二维码识别单元，用于识别二维码图像所包含的字符串信息；
所述二维码标记显示单元，用于当二维码扫描识别成功后，在所述拍摄装置的显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功；
录像音视频文件处理单元，用于将二维码图像的字符串信息与录像音视频文件进行唯一性关联；
还包括有与所述后台应用业务***相连接的采集工作站，所述执法记录仪与所述采集工作站相连接。
在上述技术方案中，由于具有二维码识别单元，该执法记录仪可识别二维码所包含的字符串信息，二维码图像包含的信息有使用人员、使用时间和执法记录事件或者说通过这个二维码图像所包含的信息，能够追溯到这些信息；每个二维码包含的字符串信息有唯一性、特殊性、指定性，二维码图像包含的信息有使用人员、使用时间和执法记录事件，即二维码能够与执法记录仪形成唯一对应性，这样，再利用二维码标记显示单元，当二维码扫描识别成功后，在所述拍摄装置的显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功，并通过录像音视频文件处理单元将字符串信息与录像音视频文件进行唯一性关联，在该音视频文件被翻拍或者泄露后，能通过该唯一标识信息追溯是从哪一个执法记录仪或者操作人员泄露；录像完毕后，由采集工作站读 取执法记录仪内的音视频文件、图片文件、录音文件上传到采集工作站，并由采集工作站自动上传到音视频资源专用存储设备，上传完成后就可在应用***的客户端查询到该执法行为生成的执法记录，同时可以看到该执法记录过程中所拍摄的所有执法音视频文件。
与现有技术相比，由于各类终端生成的二维码包含的字符串信息有唯一性、特殊性、指定性，在该音视频文件被翻拍或者泄露后，能通过该字符串信息追溯是从哪一个执法记录仪或者操作人员泄露，因此在采用执法记录的应用行业有广泛的实际需求。
在整个二维码信息流转过程中，还可以的，在采集工作站软件的后台服务器上，还开发了视频水印加密授权软件，在音视频文件被后台应用业务***调用时，在后台应用业务***的客户端(即PC客户端)上播放音视频文件时会出现特定的操作人员名称、日期、时间和操作人员所在单位信息。
优选的，所述二维码识别单元具有预处理子单元和解码子单元；其中，所述预处理子单元用于图像提取，将获取的二维码图像进行灰度化处理，降低数据量；解码子单元用于二维码码字提取、纠错译码和信息译码。
优选的，所述采集工作站与音视频资源专用存储设备相连。
通过能实现二维码扫描识别的执法记录仪与采集工作站、存储设备及后台应用业务***将整个执法过程实现音视频全程可追溯记录；
优选的，所述外部终端通过终端上的客户端软件生成二维码。
本发明要解决的另一个问题是，提供一种基于二维码扫描识别的全过程音视频记录方法，包括以下步骤：
(1)生成一个二维码图像；
(2)识别所述步骤(1)中的二维码图像，在识别出二维码包含的字符串信息后，在拍摄装置的显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功；
(3)将字符串信息与录像音视频文件进行唯一性关联；
(4)录像完毕后，读取音视频文件、图片文件、录音文件并上传存储；
(5)查询到该执法行为生成的执法记录，在进行录像音视频文件回放时，能在回放界面上显示二维码包含的字符串信息。
上述方法中的二维码图像包含的信息有使用人员、使用时间和执法记录事件，或者说通过这个二维码图像所包含的信息，能够追溯到这些信息；通过一种能实现二维码扫描识别功能的执法记录仪与采集工作站、存储设备及后台应用业务***将整个执法过程实现音视频全过程可追溯记录。
优选的，所述步骤(1)中的二维码为QRcode二维码。
优选的，在所述步骤(2)中，二维码图像的识别包括预处理和解码步骤；其中所述预处理步骤的具体方法为：
第一步：将图像采集设备获取的二维码图像进行灰度化处理，降低数据量，减少存储空间和图像处理时间；
第二步：使用中值滤波去除采集二维条码图像时引入的噪声点，降低噪声对后续图像处理的干扰；
第三步：条码识别只需要获取条码图像中的深浅模块信息即可，所以在滤波后需要对图像进行二值化，采用自适应光照均衡和Otsu全局阈值相结合的算法对二维条码图像进行二值化，去除条码图像光照不均的影响；
第四步：实现二维条码定位，获取条码的倾斜角度和四个控制顶点，将二维条码所在区域从整幅图像中切割出来，为后续条码的旋转和几何畸变校正做准备，减少后续图像处理范围，加快图像处理速度；
第五步：根据第四步得到的条码倾斜角度将图像旋转为水平状态；
第六步：实现二维条码的几何失真校正，得到一幅较为规整条码图像；
第七步：QRcode二维码根据位置探测图形和校正图形的位置信息建立采样网格，为QRcode二维码的码字提取做好准备；
第八步：QRcode二维码码字提取则是对采样网格交叉点进行采样，深色记为0，浅色记为1，即可得到QRcode二维码的码字序列；
所述解码步骤包括有二维码码字提取、纠错译码和信息译码。
优选的，在所述步骤(4)中，还包括有对音视频文件进行水印叠加、加密传输和授权处理。
附图说明
下面结合附图和本发明的实施方式进一步详细说明：
图1是基于二维码扫描识别的全过程音视频记录***的简易结构示意图；
图2是中执法记录仪的简易结构示意图；
图3是图1中的本发明的基于二维码扫描识别的全过程音视频记录***具体使用流程图；
其中：1-执法记录仪；2-拍摄装置；3-二维码识别单元；301-预处理子单元；302-解码子单元；4-二维码标记显示单元；5-录像音视频文件处理单元；6-后台应用业务***；7-外部终端；8-采集工作站；9-存储设备。
具体实施方式
如图2所示，本发明的执法记录仪1，包括有拍摄装置2，利用拍摄装置2上的摄像头可用于扫描二维码图像，还包括有二维码识别单元3，用于识别二维码图像所包含的字符串信息，所述二维码识别单元，用于识别二维码图像所包含的字符串信息，所述二维码图像包含的信息有使用人员、使用时间和执法记录事件；
二维码标记显示单元4，用于将所述二维码识别单元3识别后的字符串信息显示在所述拍摄装置2所拍摄的音视频预览和录制界面上；
录像音视频文件处理单元5，用于将字符串信息与录像音视频文件进行唯一性关联。
此外，二维码识别单元3具有预处理子单元301和解码子单元302；其中，所述预处理子单元301用于图像提取，将获取的二维码图像进行灰度化处理，降低数据量；解码子单元302用于二维码码字提取、纠错译码和信息译码。
上述执法记录仪1属于本发明基于二维码扫描识别的执法记录***的一部分，如图1所示，是本发明的基于二维码扫描识别的全程音视频记录***，包括有后台应用业务***6和执法记录仪1，还包括有外部终端7，所述外部终端7通过无线网络或者有线网络连接后台应用业务***6，所述外部终端7通过终端7上的客户端软件生成二维码；还包括有与所述后台应用业务***6相连接的采集工作站8，所述执法记录仪1与所述采集工作站8相连接；所述采集工作站8与音视频资源专用存储设备9相连。
在本实施例中，外部终端7可以是诸如智能手机、PC、平板电脑等终端，本实施例中的执法记录仪1，通过对执法记录仪1的底层主芯片进行改造，重新开发增加其功能的，实现能利用执法记录的摄像镜头对现有各类终端生成的二维 码图片进行扫描，并识别出二维码所包含的字符串信息。
具体的使用方法是：通过外部终端7，使用局域网、广域网或2G/3G/4G等各种网络通信手段访问登录执法记录***，输入执法人员、执法记录仪设备编号，执法开始时间等信息，使得外部终端7生成一条具体执法过程编号的二维码图像，二维码图像的信息包含使用人员、使用时间和执法记录事件，使用执法记录仪1扫描识别外部终端7的二维码信息；在识别出二维码信息之后，执法记录仪1开始进行执法录像，此时二维码信息就与该录像视频实现了唯一性关联；录像完毕后，执法记录仪1连接采集工作站8，由采集站8读取执法记录仪1内的音视频文件、图片文件、录音文件上传到采集工作站8，并由采集工作站8自动上传到音视频资源专用存储设备9，上传完成后就可在后台应用业务***的客户端可以查询到该执法行为生成的执法记录，同时可以看到该执法记录过程中所拍摄的所有执法音视频文件。
如图3所示，是本发明基于二维码扫描识别的执法记录***的具体使用流程图：
第一步：外部终端连接后台应用业务***生成一次执法记录，同时生成该执法记录的二维码；
第二步：执法记录仪扫描二维码，并与每一次执法记录事件的音视频文件建立唯一性关联；
第三步：执法记录仪将音视频文件、录音文件、图片文件、日志文件上传到采集工作站，采集工作站同时对执法记录仪充电；
第四步：采集工作站将接收到的多台执法记录仪的上述文件汇总后，分类保存到采集软件后台***，采集后台***WEB端管理端可以进行管理、检索；
第五步：水印加密授权***调用采集软件后台***中的音视频等资源，在后台应用业务***对音视频调用时，对音视频进行水印叠加，加密传输和授权处理；非本单位用户调阅音视频资源时开通授权调用功能，并生成相关调阅和可回溯记录等日志功能；相关资源保存在采集软件后台***中，通过采集后台***WEB管理端进行统一管理；
第六步：在第五步中将视频做完处理后，有后台应用业务***进行调用，展示在***中供播放，查询；
第七步：为本地业务***客户端或者远程非本地***的授权用户端，可以进行资 源调用或者查询；
具体的基于二维码扫描识别的全过程音视频记录方法包括以下步骤：
(1)生成一个二维码图像，所述二维码图像包含的信息有使用人员、使用时间和执法记录事件；
(2)识别所述步骤(1)中的二维码图像，在识别出二维码包含的字符串信息后，在拍摄装置显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功；；
(3)将字符串信息与录像音视频文件进行唯一性关联；
(4)录像完毕后，读取音视频文件、图片文件、录音文件并上传存储；
(5)查询到该执法行为生成的执法记录，在进行录像音视频文件回放时，能在回放界面上显示二维码包含的字符串信息。
所述步骤(1)中的二维码为QRcode二维码。
在所述步骤(2)中，二维码图像的识别包括预处理和解码步骤；其中所述预处理步骤的具体方法为：
第一步：将图像采集设备获取的二维码图像进行灰度化处理，降低数据量，减少存储空间和图像处理时间；
第二步：使用中值滤波去除采集二维条码图像时引入的噪声点，降低噪声对后续图像处理的干扰；
第三步：条码识别只需要获取条码图像中的深浅模块信息即可，所以在滤波后需要对图像进行二值化，采用自适应光照均衡和Otsu全局阈值相结合的算法对二维条码图像进行二值化，去除条码图像光照不均的影响；
第四步：实现二维条码定位，获取条码的倾斜角度和四个控制顶点，将二维条码所在区域从整幅图像中切割出来，为后续条码的旋转和几何畸变校正做准备，减少后续图像处理范围，加快图像处理速度；
第五步：根据第四步得到的条码倾斜角度将图像旋转为水平状态；
第六步：实现二维条码的几何失真校正，得到一幅较为规整条码图像；
第七步：QRcode二维码根据位置探测图形和校正图形的位置信息建立采样网格，为QRcode二维码的码字提取做好准备；
第八步：QRcode二维码码字提取则是对采样网格交叉点进行采样，深色记为0， 浅色记为1，即可得到QRcode二维码的码字序列；
所述解码步骤包括有二维码码字提取、纠错译码和信息译码。
上述方法，通过一种能实现二维码扫描识别功能的执法记录仪与采集工作站、存储设备及后台应用业务***将整个执法过程实现音视频全程可追溯记录。
在识别出二维码包含的字符串信息后，显示在执法记录仪的音视频预览和录制界面上，在执法记录仪开始录像后，能将字符串信息与录像音视频文件进行唯一性关联。由于各类终端生成的二维码包含的字符串信息有唯一性、特殊性、指定性，因此在音视频文件的回放过程中，能最为音视频文件的唯一标识，在该音视频文件被翻拍或者泄露后，能通过该字符串信息追溯是从哪一个执法记录仪泄露或者操作人员。
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明；凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (8)

  1. 一种基于二维码扫描识别的全过程音视频记录***，包括有后台应用业务***和执法记录仪，其特征在于，还包括有外部终端，所述外部终端通过无线网络或者有线网络连接后台应用业务***，在所述外部终端上生成二维码；所述执法记录仪包括有拍摄装置，还包括有二维码识别单元、二维码标记显示单元和录像音视频文件处理单元；
    所述二维码识别单元，用于识别二维码图像所包含的字符串信息；
    所述二维码标记显示单元，用于当二维码扫描识别成功后，在所述拍摄装置的显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功；
    所述录像音视频文件处理单元，用于将字符串信息与录像音视频文件进行唯一性关联；
    还包括有与所述后台应用业务***相连接的采集工作站，所述执法记录仪与所述采集工作站相连接。
  2. 根据权利要求1所述的基于二维码扫描识别的全过程音视频记录***，其特征在于，所述二维码识别单元具有预处理子单元和解码子单元；其中，所述预处理子单元用于图像提取，将获取的二维码图像进行灰度化处理，降低数据量；解码子单元用于二维码码字提取、纠错译码和信息译码。
  3. 根据权利要求2所述的基于二维码扫描识别的全过程音视频记录***，其特征在于，所述采集工作站与音视频资源专用存储设备相连。
  4. 根据权利要求1所述的基于二维码扫描识别的全过程音视频记录***，其特征在于，所述外部终端通过终端上的客户端软件生成二维码。
  5. 一种基于二维码扫描识别的全过程音视频记录方法，其特征在于，包括以下步骤：
    (1)生成一个二维码图像；
    (2)识别所述步骤(1)中的二维码图像，在识别出二维码包含的字符串信息后，在拍摄装置的显示屏的视频预览和录制过程中，所述显示屏上显示识别成功的标记或者通过声音提示标记成功；
    (3)将字符串信息与录像音视频文件进行唯一性关联；
    (4)录像完毕后，读取音视频文件并上传存储；
    (5)查询到该执法行为生成的执法记录，在进行录像音视频文件回放时，能在回放界面上显示二维码包含的字符串信息。
  6. 根据权利要求5所述的基于二维码扫描识别的全过程音视频记录方法，其特征在于，所述步骤(1)中的二维码为QRcode二维码。
  7. 根据权利要求6所述的基于二维码扫描识别的全过程音视频记录方法，其特征在于，在所述步骤(2)中，二维码图像的识别包括预处理和解码步骤；其中所述预处理步骤的具体方法为：
    第一步：将图像采集设备获取的二维码图像进行灰度化处理，降低数据量，减少存储空间和图像处理时间；
    第二步：使用中值滤波去除采集二维条码图像时引入的噪声点，降低噪声对后续图像处理的干扰；
    第三步：条码识别只需要获取条码图像中的深浅模块信息即可，所以在滤波后需要对图像进行二值化，采用自适应光照均衡和Otsu全局阈值相结合的算法对二维条码图像进行二值化，去除条码图像光照不均的影响；
    第四步：实现二维条码定位，获取条码的倾斜角度和四个控制顶点，将二维条码所在区域从整幅图像中切割出来，为后续条码的旋转和几何畸变校正做准备，减少后续图像处理范围，加快图像处理速度；
    第五步：根据第四步得到的条码倾斜角度将图像旋转为水平状态；
    第六步：实现二维条码的几何失真校正，得到一幅较为规整条码图像；
    第七步：QRcode二维码根据位置探测图形和校正图形的位置信息建立采样网格，为QRcode二维码的码字提取做好准备；
    第八步：QRcode二维码码字提取则是对采样网格交叉点进行采样，深色记为0，浅色记为1，即可得到QRcode二维码的码字序列；
    所述解码步骤包括有二维码码字提取、纠错译码和信息译码。
  8. 根据权利要求5所述的基于二维码扫描识别的全过程音视频记录方法，其特征在于，在所述步骤(4)中，还包括有对音视频文件进行水印叠加、加密传输和授权处理。
PCT/CN2018/108968 2017-10-10 2018-09-30 基于二维码扫描识别的全过程音视频记录***及使用方法 WO2019072126A1 (zh)

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