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Method for dynamically measuring sight distance of drivers based on video

A measurement method and dynamic measurement technology, which are applied in line-of-sight measurement, measurement device, measurement distance and other directions to achieve the effect of ensuring safety and intuitive effect.

Active Publication Date: 2011-11-02
BEIHANG UNIV
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Problems solved by technology

[0006] At present, domestic patents related to the driver's sight distance are still rare, so it is of great significance to study the driver's sight distance measurement method

Method used

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  • Method for dynamically measuring sight distance of drivers based on video
  • Method for dynamically measuring sight distance of drivers based on video
  • Method for dynamically measuring sight distance of drivers based on video

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Embodiment Construction

[0019] (1) Select some representative road sections and take road videos at different time periods and under different weather conditions. Each video is processed, the road area in the video is manually extracted, and the histogram is processed to obtain the pixel value range of the road area. After summarizing all obtained pixel value ranges, a general road area pixel value range is obtained.

[0020] (2) Install a camera in the car, the position of the camera is close to the position of the driver's eyes, and the camera is calibrated according to the camera imaging model ( figure 1 ). During the calibration, the straight line edges with parallel and vertical relations, such as the road edge of the road intersection, the sign marking line, etc., are used to establish an appropriate on-site plane coordinate system to realize the calibration of the transformation parameters. Such as figure 1 As shown, the conversion relationship between the image and the road coordinate syst...

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Abstract

A method for dynamically measuring a sight distance of drivers based on a video is characterized in that: during driving, a video on the front road is shot by a camera mounted in a vehicle, and the video is processed in real time; the road area is separated from other areas in the video, and the farthest point of the road area is acquired; the horizontal distance from the camera to the farthest point in the road area is the sight distance (Fig 1) of the driver at the point; and thus the sight distance of drivers can be detected real time in order to remind drivers timely at the road section where the sight distance is relatively poor and reduce traffic accidents. The method for dynamically measuring the sight distance of drivers based on video has the characteristics of low cost, strong instantaneity, simple operations and high speed; the method makes the researches on the sight distance of drivers more convenient; and the method is in favor of reducing traffic accidents and ensuring the traffic safety.

Description

technical field [0001] The invention relates to a dynamic measurement method for a driver's sight distance based on video. During the driving process of the vehicle, the camera fixed on the vehicle body is used to simulate the driver's eyes and take pictures of the road ahead of the vehicle; by analyzing and processing the captured video, the farthest point on the road that the driver can see is obtained, and the location of the camera is calculated The horizontal distance from the furthest point on the road is the desired driver's sight distance. Background technique [0002] With the gradual deepening of the research on highway sight distance, the research on highway sight distance at home and abroad is gradually increasing. In addition to improving and optimizing the traditional methods, some new methods are also proposed. [0003] There are relatively many researches on highway sight distance in foreign countries. In the 1990s, someone proposed a planar line-of-sight ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C3/00G01C11/04
Inventor 鲁光泉王云鹏张喆易正国田大新余贵珍刘淼淼
Owner BEIHANG UNIV
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