One, application background
Security and terrorism has become a global common high attention of social and political problem; To create safe city, and peace, peace is to realize the Olympic Games China's "harmonious society" is very important social and system engineering. As these "peace" project to realize a key technology, video monitoring system to have been widely used in government agencies, schools, Banks, public security, transportation, the living community, etc. Various kinds of places. With the rapid increase in the number of camera, the traditional artificial watching monitoring mode, in the practical application has drawbacks highlight. Scientific experiments show that, the person's continuous attention every hour less than twenty minutes, not on the multiple video for uninterrupted effective monitoring; At the same time monitoring personnel cannot across multiple cameras for real-time global event splicing and analysis. Resulting in most monitoring pictures in fact no one monitoring, cannot achieve real-time effective defense and alarm function.
Intelligent video analysis system makes the computer have a certain amount of monitoring and analysis ability, truly achieve 24 hours of continuous monitoring, can largely alleviate artificial monitoring strength.
Two, the function overview
System main features include:
(1) to identify monitoring of the image object types: pedestrians, cars, bicycles, motorcycles, and other objects.
(2) in each monitoring menu set several lines, alarm area, at the same time alarm.
(3) to identify monitoring picture objects from some behavior: set the direction of movement through the line, in and out of alarm area, from setting direction in and out of MenDong, remove the important objects in the monitored area, stay wandering, over the wall, etc.
(4) each line, alarm area can also have a variety of alarm form and alarm level.
(5) according to the configuration can be stored, real-time video and alarm video.
Three, the technical implementation
Intelligent video analysis system is made up of the following parts: intelligent video analysis host, intelligent video analysis unit, client and video access.
Intelligent video analysis host: mainly manage all client and all of the analysis unit, realize customer end and analysis unit real-time communication and data interaction. Includes analysis of the application of the set, streaming video real-time forwarding, alarm linkage, alarm video and timing video, video data management and video files such as remote view function. At the same time storage user Settings data and user management data and some alarm data, etc.
Intelligent video analysis unit: mainly algorithm part, responsible for video acquisition, analysis, calculation, target detection and tracking alarm, video compression, etc, the main detection function including perimeter protection and intrusion detection, for line detection, abnormal direction detection, human behavior detection, kitsch detection, fireworks detection, items stolen or mobile detection, etc.
Client: mainly is to provide to the user to the scene for real-time video monitoring, single and multiple screen at the same time in prison, and, behold, the alarm processing and the system configuration management, etc., the main configuration includes system Settings, configuration monitoring scheme analysis Settings, set the alarm event type, according to the time for different application scheme of the monitoring plan, PTZ alarm linkage Settings, video management and alarm video information, electronic maps, etc.
Video access: can provide analog and digital two access, analog video direct access intelligent video analysis unit; Digital video can through the decoding way access intelligent video analysis unit, also can through the DVR way access intelligent video analysis host for video analysis. According to the processing capacity requirement can be dynamic expansion intelligent video analysis unit and intelligent video analysis the number of hosts.
Four, the application and the customer benefit
(1) hardware change solutions, stable and reliable.
(2) greatly reduce the labor intensity of artificial control.
(3) can deal with all kinds of complicated video situation.
In the actual monitoring applications, with the actual situation of the differences, the following several situation will give intelligent video analysis difficult:
(1) camera sloshing in a small range shaking.
(2) low illumination and backlighting.
(3) change light for 24 hours.
(4) indoor light, caused by the changes of the light.
(5) indoor floor, glass and smooth reflection and reflective.
(6) outside the wind shaking the trees, grass.
(7) by strong sunshine cause target shadow.
(8) the rain snow scene, caused by the image changes.
(9) to adapt to the color, black and white camera image.
(10) by wide Angle lens image distortion effect.
(11) by the water ripple effects.
(12) target in the picture very large or very small situation.
We to the above conditions are studied, enables the system with strong anti-interference ability, part of the field processing results are as follows:
We and the United States ObjectVideo (OV) products for two years of contrast test, a large number of tests show that our products in performance has a certain advantage, in addition to the overseas product compared with obvious price advantage.
Five, involving the product
Intelligent video analysis host, intelligent video analysis processor.
