Applications of PhotoModeler in Accident Reconstruction

Abstract

Photographic methods of analyzing vehicles and scenes for the purpose of accident reconstruction have been well researched and documented. Photogrammetric analysis has appeared in various forms and levels of complexity over the years. Mathematical relationships have been researched and presented depicting the methods and bases of these techniques. This paper will present some new tools and methodologies in the process of photographic analysis. The PhotoModeler program will be utilized to demonstrate applications of digital photogrammetry in the field of accident reconstruction. Several different methodologies, including single and multiple photograph projects using calibrated and inverse cameras, will be evaluated and demonstrated. Additionally, comparisons to traditional methods of measurements will be presented. It will be demonstrated that the use of digital photogrammetry has advanced the science of accident reconstruction by employing computer and digital technology to achieve greater efficiency and improved accuracy.

Application of Composite Small Calibration Objects in Traffic Accident Scene Photogrammetry

“…The two-dimensional direct linear transformation (2D-DLT) method based on a plane calibration object is simple, practical, and highly accurate. Thus, it is widely used at present [ 16 , 17 ]. However, the 2D-DLT algorithm can also correctly reflect the perspective projection relationship between a spatial plane and the image plane of an entire scene, which requires as many calibration objects as possible to cover the site area of interest [ 18 , 19 ].…”