With the rapid development of video monitoring system, intelligent video analysis function, and gradually become a hot topic in the network video monitoring. How to effectively and reasonably to realize intelligent network video monitoring, is to explore topics of this article.

Wen/Ann telecommunications and network communication equipment co., LTD

At present, the concept of network video monitoring is widely accepted by the public, at the same time, the security monitoring industry of digital and networked trend is unstoppable. So-called network video monitoring, namely through the digital and networked video front-end, such as network devices, such as a camera or video encoder to monitor video image digital encoding, and then through the computer network transmission to browse terminal workstation, server, and through the digital video storage medium for storage.

Network video monitoring has convenient installation deployment, save the cable, easy access, remote monitoring, such as scalability strong extensibility, traditional analog monitoring system does not have the advantage of, is becoming more and more new, alteration or extension of safety monitoring system project of first choice. At the same time, along with the rapid development of digital and network video monitoring system, making it possible to intelligent video analysis function, and gradually become a hot topic in the network video monitoring.

How to effectively and reasonably to realize intelligent network video monitoring, is discussed in this paper, the key.

Intelligent video surveillance system essential functions

What kind of intelligent network video monitoring system is user want?

First of all, the intelligent video surveillance system should be able to perceive the front camera video changes, such as video occlusions, loss of video, video fuzzy, perspective transformation, etc., send alarm signal is active. For example, in a large surveillance system of 1000 monitoring points, monitoring center or the personnel on duty can consider or view the video images may be dozens of road, when a video is consciously or unconsciously keep out all the way, the personnel on duty are hard to find in the first time, it may bring great safety hidden trouble, but has a shade the perception of video monitoring system can be the first time report to send system, take the initiative to inform the staff on duty to check.

Second, intelligent video surveillance system should be able to corresponding protection zones of safety equipment, such as entrance guard system, alarm detector, infrared detector, etc., to realize joint work on comprehensive security platform, thus deepening the video monitoring and control system for monitoring protection function. For example, when receives the alarm signal, the corresponding network camera can be automatically transferred to the corresponding preset, automated video, and trigger the alarm, sound and light alarm, so as to realize comprehensive security function.

Third, intelligent video surveillance system from the front to receive video intelligence analysis, and on this basis to realize a variety of applications, for example, analyze the road vehicle video, so as to realize the license plate capture, license plate recognition; To the corridor, inward and outward video analysis, realize face to capture, then achieve face index, photographs, contrast, and other functions; Analyze the video in public places, the realization of character motion capture or suspicious objects alarm and automatic tracking, and other functions.

In addition, the network video system is based on computer network video monitoring system, the system response network in the illegal access, illegal invasion has the ability to resist, so as to fully guarantee the security of the monitoring system, access security, transport security, etc.

The realization of the intelligent video mode

Network video monitoring system based on computer network architecture, network cameras or encoder for the front-end equipment, loading video servers, workstations for backend management software management platform of the video monitoring system. Based on the network video function of intelligent video monitoring system is mainly divided into the following several ways:

1, through the backend software service implementation

This implementation is to point to by running the backend server back to the front camera transmission of video streaming video management software for intelligent video analysis, so as to realize intellectualization of front-end video information processing; In the way of system is realized by using the intelligent video, front-end video equipment duty is to complete the basic function of the camera, only responsible for the lens of the video information transmission to the back end, without any analysis work, front-end video equipment pressure is small; Instead, for the back-end server or backend management software, is not only need to be responsible for the daily video real-time browsing, video, video playback and log event management, at the same time also need to be responsible for various intelligent video analysis, so as to realize such as mobile shade the alarm and linkage to trigger alarm detection alarm, video, and other functions, as well as face capture, license plate recognition applications such as sexual function.

In a large surveillance system, use this way to the back-end management resources to bring high pressure, need to improve the backend equipment performance to ease, such as improving server configuration, increasing the number of servers.

2, through the front-end equipment service implementation

This implementation is to point to by the front-end network video equipment for video information intelligence analysis, realize the corresponding function of intelligent video. In this system, the front camera is often through the analysis of the embedded video service implementation to shoot video analysis, the system pressure distributed on the front-end video equipment, but because of all the intelligent analysis function by front-end video equipment, and itself front-end network video equipment of CPU resources are limited, so often need to improve the front-end device configuration or using a dedicated video analysis instrument combination, can realize the function of video analysis on the front end.

3, as well as the combination of the front and back at the implementation of the way

This is a way of compromise and a reasonable and balanced intelligent video is implemented. On the one hand, make full use of the front-end web video equipment spare CPU resources to realize some simple intelligent video function, on the other hand, after the end of the video software, focus resources to achieve higher or more geared to the needs of the application of intelligent video function, such as recognition of license plate recognition, behavior and so on, such a system, the pressure distribution of more balanced in the front of intelligent video network video device and the backend management server, doing things all equipments and system architecture is more reasonable.

The case application of intelligent video

This project is a Scandinavian city traffic monitoring system, monitoring, station monitoring system consists of subway, bus vehicle monitoring, etc., system adopt network cameras, total monitoring points in more than 10000 points.

In this network video monitoring system, not only for the subway vehicle, bus, and various social activities for subway, bus station, monitor, and at the same time, demand for shade the key area alarm, video loss alarm, video motion detecting alarm, camera corresponding regional linkage alarm and detector, and the realization of video monitoring system combined with GPS map and the police system of intelligent applications.

Obviously, for this requirement, the back-end video analysis is difficult to meet, 10000 video source pressure brought about by the huge video analysis needs a huge number of backend management resources to finance, cost and immeasurable; And adopt the way of front-end analysis, it is difficult to realize with GPS map and the function of the system integration of police. And use the front and at the combination of intelligent video is implemented very well meet the needs of the user.

In the front-end network camera, embedded in the network cameras internal intelligent video analysis service make full use of the network camera spare CPU resources, achieve the function of built-in motion detecting and video keep out alarm function, these functions without a large number of video analysis and calculation and easier to implement on the front end, also need not add any auxiliary analysis instrument, so as to realize when the camera video lost, lost camera obscured, the focal length, lens by spraying conditions such as active alarm and motion detecting function of the key areas; At the same time, the network camera integrated digital I/O ports can be realized in the front and the alarm, the linkage of the detector functions, meet the function of the integration of comprehensive security.

The backend server, video management platform will concentrate resources on the system integration, video monitoring system with GPS electronic map system, management system of police and office management system, telephone system, on the seamless integration of achieve front-end video anomalies or alarm occurs, through the OUTLOOK to the related personnel to send e-mails, upload images, at the same time realize location accurate location through GPS electronic maps, and linkage system of police to find the related area is responsible for the police, again by the telephone system automatically by calling the police, notify its rapid response.

Through the example above, we found that only the function of intelligent video evenly distributed in all aspects of video monitoring system, to achieve efficient and balance the effect of the high cost performance, which really will increase the advantages of network video monitoring to a new level.

conclusion

In the future, the intelligent video surveillance will be a necessary function of network camera, also will be the trend of development. How to put these intelligent video function truly, may still have a long way to go.