With the development of computer and network technology, video monitoring system gradually transition from analog era to digital era, including digital video monitoring signal acquisition, compression, transmission, storage, realized the digital and network. However, degree of intelligent video surveillance system is still very low. In recent years, with the continuous improvement of computer performance, using computer vision technology to monitor and control system of the video information is analyzed, so that to develop in the direction of intelligent video monitoring system is possible.

1,The application and function

Intelligent video surveillance system is an involved in computer vision, pattern analysis, artificial intelligence, automatic control, computer network and so on multi-disciplinary system engineering. Intelligent video surveillance in the Banks, supermarkets, warehouse, museum, prison requires long-term monitoring sites, such as the function of the system should provide:

1. The test tracking motion object (person, vehicle, or other objects) activity in the region;

2. The movement object behavior analysis to understand and forecast;

3. Store the monitoring information at the same time, also should include a description of the scene object for query;

4. Be able to store the monitoring information to provide the quick query based on content;

5. Give priority to with video cameras and can provide the probe more comprehensive detection function;

6. Through the use of advanced network transmission systems for monitoring in large range, and for large coverage within the scope of the multiple detector can make them coordinate with each other, increase the reliability;

7.Friendly human-machine interface, such as the monitoring area to provide comprehensive information display, alarm events in a timely manner to show positioning, provide the monitoring information of stored query;

8. Remote query control function.

2, the key technology and difficulty

1, the tracking (Humantracking)

Video processing system for moving target detection and classification, if the confirmation is for automatic tracking. Detection and tracking is a difficult problem of many people, in order to reduce the mutual keep out the ambiguity of multiple target problems, must develop a better model, such as based on skin color model and the method of face detection as a means for tracking. In addition, you can use multiple cameras on expanding our scope of effective monitoring, by selecting the best shade between goal perspective to solve the problem, to switch between multiple camera choice and information fusion is a need to solve the problem.

2, coding technology based on content

Hard disk video recorder used in the monitoring system, based on MPEG4 / h. 263 / h. 264 and other advanced international coding standard based on the acquisition of video signal compression storage. Although these standards can be according to the complexity of the scene in the video to provide adaptive variable bit rate coding, but they are not specific to a particular occasion. Monitoring system especially follow a moving object tracking based on human motion as the basic content, so the system can be aimed at moving objects (people) of high bit rate coding distribution, and less static environment background distribution rate, thus guarantee the in the case of limited processing time and resources in the compressed video monitoring target with high resolution. From the perspective of the development of technology, if intelligent image understanding technology is very mature, the existing video compression will translate into intelligent storage technology, that is to say, just store the information of "useful", rather like the current monitoring system without selectively to store all the content.

3, people's behavior pattern research

Automatic recognition of human behavior, to extract various tracking the path of a people, dress, body movement, behavior recognition automatically, if found in violation of the predefined rules, action, provide timely report to the police.

4, video database management

Namely, to establish effective video database, including a monitoring system for efficient storage, retrieval, query. Monitoring of storage information to provide the quick query based on content, quickly find out the suspicious target in the video storage.

5, DSP hardware products

The final video monitoring products in order to realize the hardware, using high-performance signal processing (DSP) chip. Such as TI company's TM320C6000 series and so on, these chips being geared to the needs of real-time signal processing, so its core operational unit has a high computational speed.

3, project development plan and the existing technology accumulation

(1) product completed in two stages

1， PC based system development stage, this stage focuses on intelligent processing algorithm design and prototype system software validation.

2， based on SOC (SystemOnChip) embedded product development phase, to embed the intelligent monitoring program in DSP/ARM chip as the core processor.

(2) the existing technology

1, face detection and recognition

For identification for entrance guard system; In the face database automatically find the criminal.

2, moving target detection and tracking

Real-time tracking moving human face in video, simulation and locate facial features of expression. The expansion of this technology can be used to identify the person's activity, as the basis of intelligent monitoring.

3, digital hard disk video recorder

Digital video coding based on MPEG4 standard storage technology, and its ASIC hardware implementation.