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Vehicle distance measuring method based on binocular vision

A measurement method and binocular vision technology, which can be used in line-of-sight measurement, measurement device, measurement distance, etc., and can solve problems such as large measurement errors.

Inactive Publication Date: 2008-10-29
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a vehicle distance measurement method based on binocular vision, which solves the problem of large measurement errors in the prior art. The present invention can automatically measure the distance between the vehicle and the vehicle in front according to the vehicle outline information and road information and automatically compensate for changes in camera parameters caused by vehicle shaking, improving the accuracy and stability of system measurement

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  • Vehicle distance measuring method based on binocular vision
  • Vehicle distance measuring method based on binocular vision
  • Vehicle distance measuring method based on binocular vision

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Embodiment Construction

[0052] Such as figure 1 As shown, two cameras are installed behind the windshield of the vehicle, and the placement of the two cameras is adjusted so that the two cameras have a common field of view, and the common field of view can contain most of the information on the road ahead.

[0053] The high accuracy of stereo vision measurement depends on two premises, one is that the measuring point of the preceding vehicle is correct, and the other is that the camera calibration parameters are correct.

[0054] Since the vehicle is an artificial rigid body, its rear image has the following characteristics:

[0055] (1) Compared with the natural scenery on the road, the edge of the vehicle has the characteristics of obvious edge, continuous, and the direction is approximately vertical or horizontal;

[0056] (2) When viewed from the back, the outline of the vehicle is generally rectangular;

[0057] (3) There is a big difference between the texture of the back of the vehicle and the te...

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Abstract

The invention provides a method of measuring the vehicle distance based on binocular vision. Required parameters are obtained by adopting a self-adapting front vehicle distance measurement system of stereoscopic vision, which comprises a camera unit used for shooting traffic information ahead. The camera unit comprises a first camera C1 and a second camera C2; the coordinate system of either camera in the camera unit is taken as the world coordinate system of the whole measurement process, the photo-center of the camera is taken as the origin of the world coordinate system and is noted as 0, the positional relation between the two cameras in the camera unit is calibrated, and the size of the driveway area and the traffic lane line information of the vehicle are obtained and noted as S1, thus improving the measurement accuracy and ensuring the driving safety.

Description

Technical field [0001] The invention relates to a method for measuring the distance between a front vehicle and a rear vehicle. Background technique [0002] As an important part of Intelligent Transportation System (ITS), vehicle safety system has always been an important research field, and the distance measurement technology of the vehicle ahead is one of the most critical technologies in the vehicle safety system. The distance measurement technology of the vehicle ahead is not only a frontier and hot spot in the field of current vehicle safety systems, but also a high-tech combination of computer vision technology and electronic technology. The accuracy of the distance measurement of the vehicle ahead determines the performance of the vehicle safety system to a large extent. [0003] Among the current vehicle ranging systems, the vision-based ranging method is recognized as the most promising method. At present, most of the existing visual ranging systems use the front vehicl...

Claims

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Application Information

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IPC IPC(8): G01C3/00G01B11/00
Inventor 张为公林国余
Owner SOUTHEAST UNIV
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