With the improvement of broadband wired and wireless network infrastructure and the growing demand for the global security market, the application of video surveillance is exploding. The development trend of video surveillance systems is very obvious. After going through digitization and networking, the next important trend is intelligence, namely the application of intelligent monitoring and video analysis technology.
Traditional video surveillance uses manual video surveillance to detect security risks or abnormal conditions, or for post-mortem analysis. This application has its inherent shortcomings, making it difficult to implement real-time security monitoring and detection management. The monitoring system with intelligent analysis function can collect and analyze data actively by distinguishing the shape and motion of the monitored object, and perform alarm, record, analysis and other actions according to preset conditions. The intelligent monitoring system can run on the server or on a DSP-based embedded system, which has gradually become mainstream.
The application of intelligent video can be divided into three aspects: security, human behavior detection and intelligent transportation. Among them, security application is widely regarded as the most potential market. It includes the following application categories: intrusion detection, which can automatically detect the behavior of motion in video pictures; item removal detection can automatically detect item movement events - When an item in a specific location in the defense zone is taken away or removed, an alarm is issued; the residue detection can automatically detect the abandoned object - when the item is placed or abandoned in a certain zone, it will automatically alarm; intelligent tracking, The camera can be self-propelled PTZ driven by its own pan/tilt and zoom lens. Human behavior detection applications include off-the-job detection (which can automatically detect the presence of sentry personnel) and sputum detection (human sputum detection in important areas). Intelligent transportation applications include: detecting illegally parked vehicles, issuing an alarm when the vehicle illegally stays in the defense zone; vehicle retrograde detection to identify the retrograde vehicle in time.
With the gradual improvement of accuracy and reliability and the decline of product cost, intelligent video has been applied in more and more occasions. It can replace some security equipment, reduce the work intensity of security personnel, improve work efficiency and reduce management costs. In fact, the application of intelligent video has great potential. As technology matures, the application areas of intelligent video technology are rapidly expanding. These applications mainly include the above-mentioned security, transportation, retail, and service industries, such as population statistics, face recognition, crowd control, attention control, and traffic flow control. Wait.
The demand for real-time video surveillance is growing rapidly. Especially with the increasing demand for real-time security monitoring applications, the ability to discover security threats or target anomalous behaviors in real time has become increasingly important and practical. Intelligent video surveillance system products are increasingly Driven by increased demand, it is becoming a new hot spot for video surveillance applications.
Intelligent video application design strategy
The choice of hardware platform solution often determines the overall solution cost, performance, availability of development tools and methods, and the feasibility of continuous upgrade in the future. Therefore, the selection of the solution platform is very important. The uniqueness of the intelligent video application itself requires a comprehensive trade-off in the choice of hardware platform. The networked and intelligent analysis requirements of video surveillance systems, as well as the limitations of cost, size and power consumption for large-scale engineering installations, non-standardized intelligent video analysis methods and almost customized solution optimization methods, combine the advantages of MCU and DSP, The converged processor solution platform with software design flexibility and powerful processing capabilities shows a clear advantage. This article will combine the characteristics of ADI's unique Blackfin convergent DSP processor to analyze the main design techniques in intelligent video design.
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