Future high-speed monitoring, intelligent analysis, high-definition trend analysis

In the future, the development and construction of highway monitoring systems will be driven by the development of networking, high-definition, and intelligence. If the network is a single upgrade of the highway monitoring system, then high-definition is undoubtedly a real picture quality innovation. At present, in most highway video surveillance systems, the image resolution is only CIF, D1, and other picture quality effects. Once connected to the back-end storage display device, there may be room for improvement in the clarity of presentation. However, for video surveillance, image clarity is the most critical and basic requirement.

The clearer the video surveillance image and the more complete the picture details, the higher the accuracy of the intelligent analysis function. As we all know, the premise of recognition analysis is to identify the smallest pixel whose picture can meet the recognition conditions. When the target pixel is larger, the recognition is clearer and the analysis accuracy is higher. In short, the use of intelligent analysis functions is based on the premise of clear image recognition. Compared with SD, HD front-end products have more effective pixels per unit area under the same focal length and distance of field of view, which means they can provide more clear target information for video analysis and processing operations, thereby improving data accuracy. . Whether it is for intelligent front-end analysis mode or back-end platform analysis and processing, high-definition picture quality is an important factor in improving the accuracy of intelligent analysis. It can be seen that high-definition image quality is not only satisfied with a single visual effect, but also provides a more useful analysis environment for intelligent analysis.

Nowadays, for the real recognition of high-definition surveillance, it refers to the concept of overall high-definition, that is, high-definition front-end devices, high-definition storage, high-definition management platform, high-definition decoding, high-definition display and other aspects of the series of high-definition. The overall high-definition system is a real restoration of the live picture. The lack of any one of the links is not sufficient to present full-definition high-definition.

As shown in the display, the HD display device compares with the SD display device, which can better process the front-end captured images. The dynamic super-resolution technology of high-definition display devices analyzes and processes the data of each image frame, and processes low-resolution images into high-definition images for display. In addition, for high-speed motion object resolution in the expressway industry, high-definition display devices can be implemented using motion compensation technology. Motion compensation technology uses the previous partial images to predict and compensate the current partial images, thus eliminating the appearance of jagged and trailing images. The phenomenon makes the picture more smooth and clear. Therefore, the overall HD can achieve high-definition picture recovery from the end.

It can be seen that the existing high-definition devices on the market are already in full glory, and the overall high-definition solution is also more diverse. For the existing highway safety system, the following modes can be selected for system construction or reconstruction:

· Overall HD-SDI or overall network HD solution;

·The hybrid application and system composition of HD-SDI and network HD products;

·Comprehensive solutions for analog, HD-SDI, and network HD products.

The HD-SDI system can achieve high-definition image acquisition, no-delay transmission, and distortion-free high-definition display, while the network high-definition system can be more convenient for platform construction and system management and distribution. When the distance between monitoring points in the project construction is less than 100 meters, the whole system can adopt the whole HD-SDI system and directly connect to the high-definition matrix through the coaxial cable or the optical transceiver and display the output.

This mode is suitable for the high-definition reconstruction of the medium and small-scale expressway monitoring system projects. It can update the equipment while maintaining the wiring status of the original simulation system to meet the user's customary requirements. If HD-SDI is used in combination with a network high-definition monitoring system, the SDI non-compressed high-definition video signal at the front end can be compressed and encoded after the HD-SDI product is captured, transmitted, and displayed, and then packaged into an IP data transmission share and processed. storage. Under the framework of the network system, it can carry out a large and flexible system management, convenient remote access, and the establishment of a large platform. At the same time, through the use of HD-SDI high-definition video surveillance screen, the entire system of monitoring results to the extreme.

High-definition intelligent analysis is accompanied by the development of network monitoring and high-definition trend of highway monitoring systems. Massive information filtering and storage requirements brought about by the system are urgently needed. How to extract useful information from massive data and improve monitoring efficiency. It has to rely on intelligent video analysis capabilities to complete.

At present, the intelligent analysis that can be carried out for highway video surveillance includes license plate recognition, traffic event detection and analysis, and video traffic status detection. License plate recognition has been maturely applied in highway toll collection systems. It can automatically register, verify, monitor, and alarm the passing vehicles. Intelligent video analysis of traffic incidents mainly includes: object movement monitoring, object detention monitoring, sudden appearance monitoring, moving path monitoring, and object monitoring. Intelligent analysis of traffic incidents In the captured image area, real-time analysis of vehicle speeding, low speed, retrograde, and object leftovers can be performed for different lanes and traffic conditions. When a traffic accident occurs, the system can quickly link alarms and videos for traffic. Security provides protection. Traffic condition detection is to automatically identify the traffic status of the road segment through real-time data collected by the front-end. When congestion or congestion of road traffic is detected, the system automatically alarms, and statistics of congestion data are generated, and traffic is distributed to monitoring centers at all levels through the platform. information.

Of course, the future intelligent analysis of highway video surveillance goes far beyond these, and it will become more in-depth with the complexity of traffic information. In addition, it is worth noting that the future of intelligent video surveillance is based on digital, networked video surveillance, and the networking of expressways will directly affect the application scale and application level of intelligent analytics.