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Photography measurement method of scene of a traffic accident

A technology of traffic accidents and photogrammetry, which is applied in the field of transportation, can solve problems such as occupancy, inability to meet the rapid processing of traffic accidents, and excessive time, so as to reduce processing time, reduce economic losses, and reduce troubles.

Inactive Publication Date: 2007-09-12
SHANGHAI JIAO TONG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although compared with the traditional measurement method, the photogrammetry method can greatly shorten the investigation time of traffic accidents, but it will take a lot of time to reasonably arrange the calibration points and measure their actual spatial position coordinates, which still cannot meet the needs of traffic accidents. processing request

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  • Photography measurement method of scene of a traffic accident
  • Photography measurement method of scene of a traffic accident

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing the embodiment of the present invention is described in detail: present embodiment is tried out in the middle of the traffic accident scene measurement of traffic police detachment of Fengxian District, Shanghai City under the premise of technical solution of the present invention, but protection scope of the present invention is not limited to following the embodiment.

[0020] ①In this embodiment, first assemble the detachable calibration object. Insert the three shafts as shown in Figure 1 into the sleeve base, as shown in Figure 2, place two yellow square tubes horizontally as the horizontal plane, and the black hollow tube vertically upwards as the Z axis.

[0021] ② When calibrating the traffic accident scene, as shown in Figure 3, use the coordinate origins of four identical calibration objects as vertices to form a rectangular calibration system. The axes of the four calibration objects are on a straight line, and ...

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Abstract

This invention relates to a traffic accident scene photogrammetry method. The process as follows: 1. adopt calibrating to calibrate photogrammetry, pack disjointed calibrating thing; 2. Take four same calibrating things origin of coordinate as peak to compose rectangle, to form one calibrating system, and realize the process of calibrating photogrammetry of a traffic accident scene. 3. Adopt camera according to clockwise travel direction and shooting angle to shot a set of two dimension photos of traffic accident scene that installed calibrating system. 4.admit the photo to calculator, select demand metrical point, gain the image space coordinate figure, came at needed metrical point space coordinates, and through geometric computation of the space coordinates to gain the information that required for drawn the scene of a traffic accident. This invention virtually reduce the time of investigate the scene of a traffic accident, advance measurement accuracy of field data, can satisfy the effective demand of traffic accident immediate processing.

Description

technical field [0001] The invention relates to a method in the technical field of transportation, in particular to a photogrammetry method for a traffic accident scene. Background technique [0002] In order to improve the accuracy of traffic accident identification, it is necessary to carefully investigate useful information such as vehicle parking positions, tire impressions and drag marks, road scratches, oil stains, debris, and indentations outside the road at the accident scene. Traditional traffic accident on-site survey work is completed by human eyes, hand touch, tape measurement, and manual drawing. This measurement method is not high in accuracy, takes a long time, and is easy to miss information, which cannot provide sufficient information for accident analysts. information. As the traffic becomes more and more busy, it is necessary to measure the traffic accident scene quickly and accurately. Therefore, experts from various countries are working hard to find ne...

Claims

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Application Information

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IPC IPC(8): G01C15/02G01C11/00
Inventor 金先龙杜新光张晓云刘军勇
Owner SHANGHAI JIAO TONG UNIV
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