Intelligent video surveillance technology and application
The intelligent monitoring system adopts image processing, pattern recognition and computer vision technology. By adding an intelligent video analysis module to the monitoring system, it filters out useless or interfering information in the video picture with the help of the powerful data processing ability of the computer, automatically identifies different objects, analyzes and extracts key useful information in the video source, and quickly and accurately locates the accident scene, It is a fully automatic, all-weather, real-time monitoring intelligent monitoring system that judges the abnormal conditions in the monitoring screen and sends out an alarm or triggers other actions in the fastest and best way, so as to effectively carry out pre-warning, in-process processing, and timely evidence collection afterwards.
Over the past 20 years, the video monitoring system has experienced a transition from the first generation 100% analog system (VCR), to the second generation partially digitized system (DVR/NVR), and to the third generation fully digitized system (network video camera And video The server ）Three stages of development and evolution. In this process, although the video monitoring system and equipment have been greatly improved in function and performance, they are still limited by some inherent factors, including not only the physiological weaknesses of human beings as monitors, but also the limitations of video monitoring system configuration and video monitoring equipment in function and performance. These limiting factors make all kinds of video monitoring systems have more or less defects such as poor alarm accuracy, many false positives and false negatives, long alarm response time, difficulty in video data analysis, etc., which leads to the reduction of the security and practicability of the whole system.
In recent years, with the rapid increase of network bandwidth, computer processing capacity and storage capacity, as well as the emergence of various video information processing technologies, the advantages of the whole process digital and networked video monitoring system have become increasingly obvious. Its high openness, integration and flexibility create necessary conditions for the overall performance improvement of the video monitoring system and equipment, At the same time, it also provides a broader development space for the development of the entire security industry. New application models and market opportunities continue to emerge, and intelligent video surveillance is one of the most cutting-edge application models in the field of networked video surveillance.
1、 Concept of intelligent video
Intelligent video comes from computer vision technology. Computer vision technology is one of the branches of artificial intelligence research. It can establish a mapping relationship between images and image descriptions, so that computing can understand the content of video images through digital image processing and analysis. The intelligent video technology mentioned in video monitoring mainly refers to: "automatically analyze and extract key information in the video source." If the camera is regarded as a human eye, the intelligent video system or device can be regarded as a human brain. Intelligent video technology uses the powerful data processing function of the computer to analyze the massive data in the video screen at a high speed, filter out the information that users do not care about, and only provide useful key information for the monitor.
Intelligent video monitoring is based on digital and networked video monitoring, but it is different from general networked video monitoring. It is a more high-end video monitoring application. The intelligent video monitoring system can identify different objects, find abnormal conditions in the monitoring screen, and send out alarms and provide useful information in the fastest and best way, so as to more effectively assist security personnel in dealing with crises and minimize false positives and omissions. In today's increasingly severe world anti-terrorism struggle, intelligent video surveillance can obviously become a powerful auxiliary tool to deal with terrorist attacks and emergencies. In addition, intelligent video monitoring can also be applied to traffic management, customer behavior analysis, customer service and other non safety related scenarios to improve the return on investment of users.
2、 Advantages of intelligent video
Intelligent video monitoring is based on ordinary network video monitoring. In addition to the well-known advantages of network video monitoring, the intelligent monitoring system can also bring greater benefits to users:
24x7 all-weather reliable monitoring: completely change the previous mode of completely monitoring and analyzing the monitored images by security staff, and continuously analyze the monitored images through the intelligent video module embedded in the front-end equipment (network camera or video server).
Greatly improve alarm accuracy: front-end devices (webcams and video servers) integrate powerful image processing capabilities and run advanced intelligent algorithms, so that users can more accurately define the characteristics of security threats, effectively reduce false positives and missed reports, and reduce the amount of useless data.
Greatly improve the response speed: identify suspicious activities (for example, someone left a suspicious object in a public place, or someone stayed in a sensitive area for too long), and prompt security personnel to pay attention to relevant monitoring images before the security threat occurs to prepare in advance, It can also enable users to more accurately define the actions that should be taken when a specific security threat occurs, and the monitoring system itself can ensure that the crisis processing steps can be accurately implemented according to the scheduled plan, effectively preventing delays caused by human factors in chaos.
Effectively expand the use of video resources: apply video resources to non security areas, such as using the monitoring system in the lobby of the mall to automatically identify the characteristics of VIP users, and notify customer service personnel to do a good job in service in a timely manner; If someone falls in the crowd, inform the staff of the nearby shopping mall to provide help. In addition, the intelligent video system can also help the boss of the retail store to count the number of customers who visit on the same day, so as to analyze the sales situation and so on.
3、 Application of intelligent video
The application of intelligent video can generally be divided into security related applications and non security related applications. Security related applications are the main smart video applications in the market at present. Especially after the 911 terrorist attacks, Madrid bombings and London bombings, the market demand for such applications is growing. These applications are mainly used to assist the security department of the government or other institutions to improve the security protection of outdoor large area public environment. Such applications mainly include: advanced video motion detection, object tracking, face recognition, vehicle recognition, illegal detention, etc.
In addition to security related applications, intelligent video can also be applied to some non security related applications. These applications are mainly targeted at retail, service and other industries, and can be seen as auxiliary tools for management and service to improve service levels and turnover. Such applications mainly include: population statistics, crowd control, attention control and traffic flow control.
