1. System Overview With the increasing development of the video surveillance system in the judicial prison management system, the existing passive manual monitoring has been unable to meet the needs of the supervision work under the new situation, especially the current video surveillance method based on polling Vicious incidents should be defended and handled in the first place. To complete the heavy real-time monitoring tasks of the prison, ensure the safety of the prison, and make full use of the role of the video monitoring system, it is necessary to develop in the direction of active intelligent monitoring. The intelligent video behavior analysis and alarm system provides a new technology implementation method for the modern prison management system. Its successful use will greatly improve the timely defense against vicious events, filter invalid information, and liberate the police force; Identify and deal with the increasing number of various emergencies currently happening in domestic prisons, greatly reduce the occurrence of similar accidents, and at the same time implement the "science and technology strong police" strategy to meet the "modern prison service system reform and information guidance Service ". The ultimate goal is to establish a monitoring system with intelligent video surveillance technology as the core, organically integrate the intelligent video analysis system with the prison management system, information system, etc., to provide a brand new video intelligent behavior analysis solution for public security supervision and judicial prison systems. Second, user needs analysis The content of system construction is mainly divided into the internal scene, external scene of the prison and the key parts of the entrance and exit of the prison, etc .: Scenes inside the prison: Through daily security monitoring videos of important parts such as the prison room, confinement room, review room, ventilating place, labor place, etc. Various abnormal behaviors such as gathering and entering a specific area without returning for a long time realize automatic analysis, prompting, early warning and alarm functions. Outer scene area: through daily security monitoring videos set up in prison walls, perimeters, specific isolation areas, etc., automatic analysis, prompting, warning and alarming of various abnormal behaviors such as personnel crossing the wall and perimeter and entering specific isolation areas . While capturing the image of the alarm event, it also pioneered the development of the storage, search and playback functions of the "first 3 after 5" second video stream of the alarm event. Key points of entrance and exit of the prison: Automatically extract license plates and faces of people and vehicles entering and leaving the prison through high-definition cameras. And store data, pictures, video stream information, for supervisors to check and check. It can also improve the efficiency of the verification work afterwards. In addition, while managing detainees, this system can also be used to improve the management of prison staff and visiting personnel, such as: the system can automatically record the patrol staff's patrol time and route; automatically capture the visiting staff Face to avoid stealing beams and changing columns. 3. System composition and function introduction (1) Function introduction (1) Intelligent virtual warning line alarm function Realize intelligent alarms for various behaviors beyond the one-meter warning line, climbing the railing, and exceeding the height limit in the monitoring room; Application occasions: fence perimeter, road, workshop, office, activity area, etc. (2) Intelligent stand-up detection function When a certain area and time (such as learning, rest, sleeping at night) arises and walks arbitrarily, the supervisor on duty is immediately alerted. Application occasions: supervision room, labor place, lounge, hospital, etc. (3) Anti-alarm function in intelligent area Realize real-time alarm for the entry and overtime stay of personnel in the surveillance room at specific locations such as the toilet area. The overtime alarm time can be defined by the user. Application occasions: toilet, cell, workshop, hospital, lounge, etc. (4) Severe motion detection and alarm function Aid and cooperate with the video monitoring system, prompt the prompt staff to deal with abnormal events such as violent movements or personnel gathering in the monitoring room or the venting area, this function needs to be combined with audio information collection in the monitoring room. (5) Duty inspection (supervise post off duty alarm) According to the regulations: the supervisory post must patrol in and out of the corridor. When it leaves the post or does not move for a long time, the system will issue an alarm, and the alarm screenshot and video will pop up at the same time. In addition, by setting up a patrol detection function for the channels and key parts in the prison area, it is possible to record the patrol situation of the police and detainees in a specific period of time. Snap and record the process of entering specific patrol positions to facilitate inquiries afterwards. (6) Outdoor virtual wall alarm function The alarm function of the deputy warning line of the high fence of the prison or the perimeter intelligent video virtual wall alarm function of important channels and public parts can alarm the abnormal behavior (such as entering and leaving) in the set area and time. (7) Abnormal alarm function for sensitive parts near the wall In the area outside the prison wall at a certain distance and the area around the outdoor sentry post, it is set as the detection area for wandering stay and remnants. If a suspicious person enters the area and stays longer than the set time, the police will be called immediately. (8) The alarm function is entered in specific isolation parts Automatic analysis, prompting, warning and alarming of all kinds of abnormal behaviors entering a specific isolation area. (9) The off-post alarm function of the outdoor police Set the off-post alarm function in the outdoor wind farm and other key parts. If there is detainee activity in a specific area without the police accompany, an alarm prompt will be issued immediately. (10) Smart face capture function Face capture and recording function in important entrances and exits, review rooms and visiting rooms of prisons. (11) HD license plate face recognition Use high-definition cameras to perform license plate recognition on the vehicles entering and leaving the prison, and at the same time extract the appearance of the people in the car for photo storage, and record the entire video of the entrance and exit process. For management personnel to check and check. You can also create a separate vehicle access information database through the ID scanning system and the license plate face image for future review and search. (2) System architecture System connection diagram The main components of the intelligent audio and video analysis and alarm system are as follows: EV8000 series intelligent analyzer: intelligent analysis front-end software and EVALGO algorithm running platform, can access multi-channel (up to 24) analog video signal, through high-performance multi-channel video acquisition card for analog? Digital conversion and encoding compression, converted into a universal digital video signal that can be processed by the computer. Run the corresponding EVAlGO series of intelligent analysis algorithms, and use a dongle to control the software license, capture and save alarm records, and the first three and five video stream clips. EVSERVER intelligent monitoring network management platform, license management and video analysis search engine. It is the core of the algorithm, alarm, search and other functions. It realizes the storage, management, data call, search and other functions of the alarm signal through the network management intelligent video analyzer equipment; it is also the algorithm and camera license control center. EVSTATION management client: divided into local client management software and network client management. It can carry out alarm rule setting, task setting, real-time video browsing, alarm event picture and video record query to the front-end intelligent video analyzer, and can display alarm information in real time. (3) System functional characteristics Multi-level networking: The system should be able to realize multi-level intelligent networking search functions for various alarm events and automatic multi-level alarm functions for major events; Open architecture: Client / Server, Brower / Server open architecture should be supported to adapt to various network environments. Realize client remote rule setting, task setting and alarm information upload; with WEBSERVER function, authorized users can access the intelligent analyzer through a browser, view, browse, and playback video files Alarm classification: The system should be able to classify and manage various types of alarm events. According to the processing priority and various disposal plans, different alarm output methods can be selected, and linkage control can be achieved with other management subsystems and equipment. Task configuration: Various intelligent video behavior analysis and alarm functions are easy to start and stop, support batch arming and disarming, and can flexibly set arming and disarming operations according to time. Recording mode: The system should realize the recording and storage function of alarm events, and can continuously track and record the trajectory of the target object that triggered the alarm. Greatly reduce the time to search for the recording in the hard disk recording after the event. The size of the alarm log file should be suitable for being quickly sent to the monitoring centers at all levels through the network, so as to facilitate networked intelligent search. Timed segmentation / full-time recording, alarm recording, manual capture, regular alarm capture, providing pictures of alarm events and two video clips of 20 seconds before and after the alarm (1 ~ 20 seconds), 20 minutes before and after (1 ~ 20 minutes) . Statistical analysis: The system should be able to realize the classification and summary of alarm events through the background management software and alarm information database, and form the daily, weekly, monthly, quarterly, and annual reports of the same type and the same area, respectively, to provide decision analysis and use. Third-party protocols and interfaces: The system can provide various open interfaces and standard protocol procedures to achieve data exchange and integration with various management subsystems and information systems. Seamless system upgrade: The system hardware can not only support the intelligent analysis function required by this project, but also support the operation requirements of other intelligent analysis modules proposed by subsequent users outside the project without additional hardware investment. Users only need to upgrade The software module is sufficient. Alarm response time: depending on the actual network conditions, under a standard environment (unblocked network, no packet loss, ping continuously returns normally and the delay does not exceed 30ms), an event that meets the function definition occurs, and an alarm prompt message is received at the client ( Text) no more than 3 seconds. User grouping: support grouping of users, recording user operation records in the management background, recording user's viewing of events, and modification time of event attributes, to facilitate inquiries afterwards. Remote upgrade: support network remote upgrade. Storage: The storage period of the pictures and corresponding video files of the detection event is not less than 6 months, and can be accessed after logging in to the intelligent management server through a browser. Data export: Support backup of detected event data, task rules and other data.
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