Vehicle speed detection method based on target motion track

Abstract

The invention discloses a vehicle speed detection method based on a target motion track. The method includes the steps of target segmentation, target tracking conducted on the basis of Kalman filtering and speed calculation, wherein the combination of an inter-frame difference method and a fixed threshold value method is mainly adopted in target segmentation, and a segmentation result is acquired; target tracking conducted on the basis of Kalman filtering is divided into the processes of mass center acquisition, motion model establishment, motion target feature extraction and state vector updating, and therefore the target motion track is acquired; a speed calculation method mainly refers to track related point information acquisition, mapping relation establishment, speed calculation and speed correction, the mapping relation establishment mainly refers to conversion from pixel coordinates in an image to actual distances, in other words, the actual distance, corresponding to an actual coordinate system, of each pixel point in the image is calculated, speed calculation mainly refers to calculation of related information provided by the vehicle track in the mode that the distances are divided by time according to a speed calculation formula and a result is corrected according to the actual condition.

Description

technical field

[0001] The invention belongs to the technical field of intelligent transportation, in particular to a vehicle speed detection method based on a target motion track. Background technique

[0002] The ubiquitous car speeding problem not only increases the work difficulty of the traffic supervision department, but also the casualty accidents caused by car speeding also happen from time to time. For this reason, it is necessary to detect the driving speed of the vehicle and automatically identify the license plate number, so as to further automate and intelligentize the vehicle management.

[0003] To realize traffic intelligence, it is necessary to obtain comprehensive and accurate traffic information, including real-time traffic parameter information such as traffic volume, vehicle speed, and vehicle type. According to these traffic information, traffic accidents can be dealt with in time, and when necessary, guidance information should be sent to guide traffi...

Images