A real-time vehicle speed detection method and system based on a binocular camera

Abstract

The invention discloses a real-time vehicle speed detection method and system based on a binocular camera. The steps are as follows: 1) extract a rectangular frame and the coordinates of the center of mass entering the viewing angle range of the binocular camera, and track the target vehicle; 2) track the target vehicle 3) Pre-establish the parallax depth table of the binocular camera and the vertical length between the viewpoint and the optical axis at each depth of the binocular camera and the proportional relationship between the number of pixels imaged Table; 4) Obtain the parallax of the vehicle entering the binocular camera viewing angle range viewpoint and leaving the binocular camera viewing angle range viewpoint, and obtain the vertical distance length of the vehicle entering and leaving the position viewpoint from the optical axis; 5) calculate the vehicle entering and leaving the position viewpoint The distance traveled between them, and the speed of the vehicle is obtained according to the distance and time traveled by the vehicle. It has the advantages of high speed measurement accuracy and the simultaneous speed measurement of multi-lane and multi-vehicle targets.

Description

technical field [0001] The invention relates to a vehicle speed detection method, in particular to a real-time vehicle speed detection method and system based on a binocular camera. Background technique [0002] With the development of society and the continuous improvement of people's living standards, the use of motor vehicles has become one of the important means of transportation. With the increasing use of motor vehicles, how to effectively realize the management and statistics of motor vehicles plays an important role in road traffic safety and management. The detection of motor vehicle speed is an important aspect of vehicle management. [0003] At present, radar, laser or induction coils are mainly used to detect vehicle speed on the road. The above methods have been developed relatively mature, but there are certain limitations in the process of use. The speed measurement method based on the ground induction coil has the advantage of obtaining the speed of the ve...

AI Technical Summary

Problems solved by technology

In the proposed binocular stereo vision vehicle speed detection system, an additional infrared detection device is required to detect the target vehicle. When multiple vehicles pass by the infrared detection device on a road at the same time, the vehicle speed detection system may fail, which has certain limitations.

At the same time, the infrared detection device with high precision and stable performance is expensive, which increases the initial investment and later maintenance costs

In addition, the height of the binocular camera from the road surface and the distance between the infrared detection device and the binocular camera need to be known in advance during use, which increases the complexity of the system.

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