Average vehicle speed detecting method based on video
A technology of average vehicle speed and detection method, applied in traffic control systems, image data processing, instruments and other directions of road vehicles, can solve the problems of inconvenient maintenance, complex hardware systems, poor environmental adaptability, etc., to achieve reliable detection and broad application prospects Effect
Inactive Publication Date: 2015-05-27
CHANGAN UNIV
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However, the hardware system is relatively complex, the system has poor environmental adaptability, and installation flexibility is not high, so it has defects such as high failure rate and inconvenient maintenance, and it is difficult to promote in actual use.
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[0047] In the video sequence, the target vehicle tracking method based on feature points is used to track the vehicle for 100 frames, and the position of the feature points in each frame image is recorded. According to the mapping table, the actual distance of the feature points in each frame image on the actual road can be obtained. After establishing the distribution map of feature points, connect the starting point A 1 and A n , get the straight line L, calculate the distance from the other feature points to L, and set the threshold D=2cm. Among them, A m0 (A m0 is the 42nd feature point) is farthest from L, and its distance is d m0 = 3.0cm; A m0 The feature points are divided into two segments, namely A 1 A m0 and A m0 A n , the number of feature points contained in these two segments is 40 and 60 respectively, both of which are greater than 25. due to d m0 >D, so continue to segment, in A 1 A m0 The feature point farthest from L in the segment is A m1 (A m1...
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The invention provides an average vehicle speed detecting method based on a video. The average vehicle speed detecting method comprises the following steps of: obtaining characteristic points of a target vehicle by dividing the video into a plurality of blocks; obtaining the practical distance of the characteristic points in each frame image on a practical path according to a mapping table; and finally obtaining the average vehicle speed. The average vehicle speed detecting method disclosed by the invention is mainly used as judgment basis for information including road traffic conditions, traffic flow and the like obtained by the traffic supervision department, and capable of satisfying the requirements of the relevant departments on instantaneity, accuracy and detection precision of the data. Compared with the existing average vehicle speed detecting method, the method disclosed by the invention is not limited by the environment, capable of carrying out real-time and reliable detection on the average vehicle speed of all vehicles within the range of the video, reliable in detection, easy to realize, higher in accuracy, very suitable for detecting the average speed of the vehicle in real time, and extensive in application prospect.
Description
technical field [0001] The invention belongs to the field of video detection, in particular to a video-based average vehicle speed detection method. Background technique [0002] With the development of the socialist market economy, people's living standards have been greatly improved, and the number of motor vehicles has also increased rapidly. As a result, traffic problems such as traffic congestion, frequent traffic accidents, deteriorating traffic environment, chaotic toll system, backward traffic management, etc. have been brought about, thus a real-time, accurate and efficient comprehensive traffic management system that plays a large-scale and comprehensive role It came into being. The intelligent transportation system (Intelligent Transportation System, referred to as ITS) is produced under this condition. Average vehicle speed detection, as an important branch of ITS, has broad application prospects in regulating traffic order, completing automation and intelligen...
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IPC IPC(8): G08G1/052G06T7/20
Inventor 宋焕生杨媛刘雪琴彭玲玲席阳杨孟拓李洁
Owner CHANGAN UNIV