Photography measurement method for scene of traffic accident based on multi-activity control system
A technology of traffic accident and processing method, applied in the direction of camera device, etc., can solve the problems of three-dimensional control point distribution, small size of activity control system, low three-dimensional coordinate accuracy, etc.
Inactive Publication Date: 2012-11-28
SOUTHEAST UNIV
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[0004] However, when using an active control system for photo calibration, due to the small size of the active control system and its small control range, the three-dimensional control points cannot be reasonably distributed on the photo, resulting in low camera calibration accuracy, which affects the accuracy of the three-dimensional coordinates. The measurement results cannot meet the accuracy requirements for handling traffic accidents in a large range
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[0058] Such as figure 2 As shown, the present invention includes designing a multi-activity control system; digital camera calibration and photo orientation element calculation based on the multi-activity control system; and three-dimensional measurement based on the multi-activity control system. Specific steps are as follows:
[0059] Step 1: Design the activity control system; the steps are as follows:
[0060] Step 11: Design as figure 1 The activity control system adopts stainless steel tube structure. It is 1.2 meters high, the top and bottom are semicircles with radii of 0.15 meters and 0.3 meters respectively, and three semicircles are added in the middle. Set 5 "+"-shaped measurement marks on each semicircle, a total of 25 "+"-shaped measurement marks.
[0061] Step 12: Precisely measure the three-dimensional coordinates (X, Y, Z) of 25 "+"-shaped measurement marks on the activity control system by means of geometric measurement, and each activity control system ...
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The invention discloses a photography measurement method for scene of a traffic accident based on a multi-activity control system. The method comprises the following steps: designing a semi-cone activity control system with a smaller upper part and larger lower part; (2) arranging a plurality of (m) activity control systems on the scene of the traffic accident, and photographing digital pictures from various angles; (3) respectively calculating the m activity control systems in the pictures, thus obtaining straight linear conversion parameters, distortion coefficients and inner and outer orientation elements corresponding to the m activity control systems; (4) wholly calculating the m activity control systems in the pictures, thus respectively obtaining m straight linear conversion parameters, the agreed inner orientation elements and the distortion coefficients; and (5) selecting two pictures to form a three-dimensional pixel pair, selecting the same activity control systems, and calculating the three-dimensional coordinates of target points.
Description
technical field [0001] The invention relates to a method for performing close-range photogrammetry by using multiple activity control systems, in particular to a method for using multiple activity control systems to collect on-site data when using close-range photogrammetry for on-site processing of traffic accidents. Background technique [0002] The use of photogrammetry to collect traffic accident scenes includes two steps: first, a certain number of reasonably distributed three-dimensional control points are arranged at the traffic accident scene, which are used to calibrate the digital camera and calculate the orientation elements of the photos; then, the photos are taken from different angles, Based on the calibration results of the digital camera and the orientation elements of the photos, a stereo image pair is formed to calculate the three-dimensional coordinates of the measurement target. According to the size of the measurement target, the environment and the meas...
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Inventor 沙月进
Owner SOUTHEAST UNIV