Method and system for measuring speed of moving targets

A technology of moving objects and moving trajectories, which is applied in the field of speed measurement methods and systems of moving objects, can solve problems such as slow response speed, and achieve the effect of convenient speed measurement and easy popularization and application

Active Publication Date: 2009-12-16
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and system for measurin

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  • Method and system for measuring speed of moving targets
  • Method and system for measuring speed of moving targets
  • Method and system for measuring speed of moving targets

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Embodiment Construction

[0043] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] The present invention uses the basic principle of projection geometry to determine the mapping relationship between the pixel coordinates in the image and the coordinates of the pixel in the real space through the camera calibration technology, and uses the mapping relationship to calculate the sequence frame images collected by the camera. The coordinates of the moving target in the real space, and the trajectory of the moving target in the real space is obtained through target tracking, so as to estimate the speed of the moving target. Wherein, the moving target is a general term for moving objects within the monitoring range, for example, vehicles and pedestrians in traffic monitoring can be called moving targets.

[004...

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Abstract

The invention provides a method and a system for measuring speed of moving targets, which aims to solve slow response and other problems of the prior speed measurement method. The method comprises the steps of utilizing the basic principles of projective geometry, determining pixel coordinates in images and the coordinate mapping relation of pixels in real space through a camera calibration technique, utilizing the mapping relation to detect sequence frame images acquired by cameras, calculating the coordinates of the moving targets in the images in the real space, obtaining the motion curves of the moving targets in the real space through target tracking and then estimating the speed of the moving targets. The speed measurement method based on camera calibration has the advantages of fast response, large amount of detected information and capability of estimating the speed of all vehicles within a monitoring range in real time. Moreover, as the speed measurement of vehicles can be realized by utilizing the cameras, the method is easy to implement, lower in cost and easy to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and system for measuring speed of a moving target. Background technique [0002] In traffic monitoring and management, statistics and analysis of vehicle speed play a vital role in the load control and management of expressways, and are the basis of scientific management of expressways. At present, the speed measurement methods for vehicles on expressways include radar detection, loop coil detection, laser / infrared detection, ultrasonic / microwave detection, etc. Among them, radar detection and loop coil detection methods are more commonly used. [0003] The principle of radar speed measurement is: a radar transmitter is installed on the side of the road, and the radar beam is emitted in the direction of the car on the road, and then the reflected echo of the car is received, and the speed of the car is measured by echo analysis. If the speed exceeds the set val...

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Application Information

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IPC IPC(8): G06T7/20G08G1/052
Inventor 王磊谢东海黄英
Owner BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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