Intelligent video analytics involves more complex software algorithms that recognize strange and unusual behavior through programming. The application of intelligent video analysis technology mainly focuses on such functions as motion detection, image detection, area intrusion detection, object left detection, target PTZ tracking, mixing line / crossing detection, human traffic counting, license plate recognition, fighting brawl detection and abnormal running detection. The following will introduce one by one. Video anomaly detection technology is a technology that automatically detects the video status of a camera through intelligent image analysis software and can detect various video anomalies and alarms. Common video anomalies include: the video camera is being shifted or blocked, the video signal is interfered, the video signal Poor or no video signal and so on. The technology can effectively solve the front-end equipment video abnormalities can not be found in time, can greatly reduce the daily maintenance staff guards Area Intrusion Detection Technology Area intrusion detection technology is a technology that automatically detects abnormal things into the preset zones in the video frame and performs related actions such as automatic capture, recording and alarm. Compared with traditional sensors, such as passive infrared sensors and ground vibration sensors, intrusion detection technology has a wider range of intrusion detection capabilities, providing greater detection range, higher detection rate and lower false alarm rate, which can be used to Replace all types of traditional sensors for intrusion detection and alarm. This detection technology can be applied to various occasions of illegal intrusion detection, such as burglary, invasion of high-risk areas, invasion of unmanned area, climbing walls and so on. Object left detection technology Object-based detection technology is a technology that automatically detects discards and automatically alerts you when items (parcels, scrap, luggage, dangerous items, etc.) are placed or abandoned in a zone. Abandoned detection technology with rapid detection of response, recording the process of placing the discard, after the test pre-alarm, real-time video confirmation mechanism can greatly reduce the patrolling security guards, but also allow security guards have enough time and information to deal with the alarm And response to the security staff to grasp the current situation and make a major decision. In addition, by viewing video footage of the derelict process on site, security personnel can quickly locate suspicious individuals who put their belongings and take appropriate action. Abandoned detection technology is suitable for a wide range of applications such as detection of dangerous obstacles on camouflaged railroads, falling rocks, litter disposal, debris on traffic lines / highways / airstrips, Package on the counter, the slippery liquid accumulated on the ground (may lead to pedestrians slipped, accidents such as car accidents) and so on. Target PTZ tracking technology The target PTZ tracking technology is a kind of automatic detection of the moving target within the monitoring range under the preset position. If the alarm is triggered, the target tracking is performed, and the visual guidance of the camera PTZ and the zoom lens is autonomously driven according to the target moving behavior. The technique of tracking the target continues to zoom in on the close-up picture appearing in the middle of the lens. Traditional monitoring, the camera monitoring area is relatively fixed, limited monitoring range, and automatic PTZ tracking a good solution to this problem. And when the alarm is triggered, the intelligent detection technology automatically locks the target, eliminating the need for the guards to manually manipulate the PTZ to find and track the intruder. The intelligent PTZ camera automatically locks the target and triggers autonomous tracking when receiving an alarm event, Biography instant video screen. In order to achieve real real-time monitoring 7 * 24 hours, the first time intruders can be found and continuous tracking. Mixing line / crossing / climbing detection technology Tripwire crossing detection technology: through the automatic detection technology can automatically detect the video screen in the characteristics of motor behavior. Tripwire crossing detection can be used both on a fixed camera and a PTZ camera, which automatically alerts you when people or vehicles cross a tripwire. The tripwire traversal mode allows the user to set one or more triples of any shape, and for each tripwire an illegal direction (two one-way or two-way) can be specified to traverse the tripwire. When tested in tripwire traversal mode, the target moving parallel to the tripwire is ignored and an alarm is raised only when the target traverses the tripwire. This detection mode is suitable for intrusion detection in some specific occasions, such as climbing walls, crossing safety checkpoints, crossing safety perimeter and the like. Fights brawl detection technology Fighting and fights detection technology is a kind of automatic detection of the normal behavior of the crowd and suspected fights and brawls by detecting the characteristics of the speed of the human body movement, the characteristics of the trajectory and the severity of limb changes. The same cloud computing development of fights brawl detection technology is based on a three-dimensional visual field analysis of fighting fights test method. According to the target's motion vector field and depth map, the target human body is extracted. Taking the motion vector field as the main feature, the entropy of the accumulated histogram over a period of time is calculated based on the histogram of the direction of block motion vector accumulations. Statistics block average motion vector intensity, according to the depth of the target information to develop a campaign severity evaluation strategy. In the end, the probability of fights and fights in this block is obtained by combining the chaos and severity of the blocks. After the accumulation of time and space, the fights and fights are confirmed when the probabilities of fighting and fights continue to exceed a certain threshold. This technology can filter the changes of the scene illumination in the monitoring environment, and the target staggered occlusion causes the calculation error of the motion vector. According to the scene depth information to determine the degree of violence more reasonable and accurate. Conclusion Humans are not completely trustworthy observers. After only 20 minutes, people's attention on the video monitor drops by 30%, and after 1 hour they drop by 70% to a very low level. Video surveillance system can only achieve video, storage, evidence afterwards, not real-time monitoring, automatic alarm. The rapid development of intelligent video surveillance technology effectively solves the problem of real-time monitoring and management of a large number of cameras, reduces the labor intensity of the personnel and the pressure of video storage effectively, realizes the change of the active monitoring mode through the passive monitoring, Tracking changes to real-time alerts. About Silicone Speaker Case:
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Video Anomaly Detection Technology
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