Research on Photogrammetry and Processing in Road Traffic Accident Scene Fast Investigation |
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Author | CaoQiong |
Tutor | SuShiLin |
School | Chang'an University |
Course | Traffic Information Engineering \u0026 Control |
Keywords | Road traffic accidents Photogrammetry Nonlinear distortion Parameter calibration Three-dimensional reconstruction |
CLC | TP274.4 |
Type | Master's thesis |
Year | 2007 |
Downloads | 97 |
Quotes | 3 |
In recent years, with motor vehicle ownership is rising year by year , road accidents continue to increase , road traffic accidents, is facing new challenges . Traditional traffic accident scene investigation method is time-consuming , low precision , easy to miss important data , can no longer meet the requirements of modern traffic accidents processing . Digital photogrammetry technology to bring hope to the accident scene fast . This article describes the the accident scene photogrammetry required image processing technology , the basic principle of photogrammetry , image edge detection and feature point extraction and processing of two-dimensional images of three-dimensional reconstruction . Photographic measurement techniques on the basis of analyzing the characteristics of the digital camera imaging , using the fixed-focus , image nonlinear distortion coefficients solving , live camera internal parameters and external parameters of the calibration is decomposed into three processes , so that the coefficient of the nonlinear distortion of the image solving can take advantage of the completion of the experimental conditions and internal parameters . To achieve a process of decomposition , independent modules , reducing the mutual interference between the parameters to improve the measurement accuracy . Image nonlinear distortion is mainly derived from the combination of the camera lens in the lens error, and in the current camera conditions , affect the image is mainly radial distortion . Nonlinear distortion coefficient using a standard graphical method for solving this article . This approach simplifies the structure of the calibration device camera external parameters calibrated using right-angle three - point calibration method . Test proves that the program is relatively simple , and the precision of the three-dimensional reconstruction to meet the requirements of traffic accident scene the practical application of photogrammetry .