Vehicle red-light violation detection method based on combination of tracking and virtual loop

Abstract

The invention discloses a vehicle tracking method and vehicle tracking system based on the video identification technology, wherein a fixed region is defined at the bottom of a video image so as to detect the appearance of vehicles. An inter-frame space number of system frame difference is determined according to vehicle length and vehicle speed. When the vehicle appears, the running speed stage of the vehicle is judged according to a frame difference value and a special threshold, if the vehicle frame difference value is more than the set threshold, the violation state of the vehicle is detected by a virtual loop method, if the vehicle frame difference value is not more than the set threshold, the violation state of the vehicle is detected by a background difference subtraction tracking method. The system relates to vehicle detection and tracking methods and systems for the same based on machine vision; and the method comprises the following steps of: capturing images, establishing and updating background, detecting vehicle appearance, judging the running state of the vehicles, and respectively selecting the virtual loop method or the tracking method to detect the red-light violation behaviors of vehicles according to the running state of the vehicles.

Description

technical field

[0001] The invention relates to the field of traffic, in particular to a traffic signal light recognition system and method. Background technique

[0002] Intelligent transportation system is a hot spot in current research and development. The intelligent transportation system is a large-scale, A real-time, accurate and efficient integrated transportation and management system that plays a role in all aspects.

[0003] Among them, in the intelligent transportation system, the detection and tracking of vehicles is the most basic part. It requires to detect whether there is a moving vehicle entering the test field of the camera from the image sequence obtained by the camera, and to locate the position of the moving vehicle. It belongs to the computer The scope of visual research.

[0004] Currently, commonly used vehicle detection methods include background difference method, frame difference method and optical flow method. Among them, the backgrou...

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