Image correcting method of accident scene based on inherent characteristics of road environment
An accident scene, image correction technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as aggravating the direct and indirect losses of traffic accidents, increasing the tediousness of survey work, and inability to meet, reducing time and complexity. Increase and ensure the effect of measurement accuracy
Inactive Publication Date: 2012-01-04
JILIN UNIV
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This will not only cause measurement errors and affect the survey results of the accident scene, but also a series of procedures such as carrying, placing, and measuring calibration objects will increase the tediousness of the traffic accident site survey work, and the waste of time will increase the damage caused by traffic accidents. Direct and indirect losses, making it unable to meet today's requirements for rapid investigation and disposal of traffic accident scenes
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[0050] The present invention is described in detail below in conjunction with accompanying drawing:
[0051] In order to overcome the cumbersomeness and limitations of the calibration and survey work at the traffic accident scene, and at the same time improve its fast, convenient and accurate properties, the present invention proposes an accident scene image correction method based on the inherent characteristics of the road environment.
[0052] Corresponding to a point (X, Y, Z) in the spatial coordinate system of the accident scene, the corresponding pixel coordinates of the image coordinate system are (x, y). According to the linear imaging model of the camera, their relationship can be written as:
[0053] x = L 1 X + ...
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The invention discloses an image correcting method of an accident scene based on inherent characteristics of a road environment, which comprises the following steps of: 1, selecting a scene of a traffic accident, containing accident vehicles and road surface information; extracting traffic signs with more than four reference points or non-damage parts of the accident vehicles and the like; 2, shooting the accident scene; 3, starting image correcting software by image processing personnel; 4, opening a shot accident scene image by using the image correcting software; 5, clicking 'geometrical correcting' button for starting an image correcting module; manually selecting four inherent characteristic points of the road environment with a known relative position relationship on the image as correcting reference points; 6, inputting relative position parameters of the selected reference points; determining eight unknown coefficients with a least square method according to an image two-dimensional correcting model by using the selected four reference points, so as to determine a coordinate transformation relationship between a space plane and an image plane; and 7, displaying an image correcting result.
Description
technical field [0001] The present invention relates to a traffic accident scene image processing method, more specifically, the present invention relates to a method for correcting the accident scene image by using the inherent characteristics of the road environment at the traffic accident scene. Background technique [0002] The purpose of technical processing of traffic accident scene images is to facilitate accident handlers to measure and calibrate accident scene images. At present, most of the technologies and methods for correcting traffic accident scene images are based on the principle of stereo vision, using artificially set benchmarks, rulers or templates on the scene as reference points to monitor the accident scene, accident vehicles and road facilities. Wait for the scene to perform space calibration and size measurement. In order to obtain the actual spatial coordinate positions of multiple calibration objects, the positional relationship between each calibr...
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IPC IPC(8): G06T7/00
Inventor 许洪国谭立东刘宏飞王吉亮任有
Owner JILIN UNIV