Laurence R. Penn, CFVT, Senior Forensic Animation/Video Specialist

Laurence R. Penn, CVFT, Senior Forensic Animation/Video Specialist

When analyzing surveillance video for accident reconstruction, all sorts of evidence can be captured in the recording – some of it easily missed! In an incident on a rainy night, an individual was carrying a food order to the driver-side of their parked car when a passing vehicle drove by and struck the individual, catapulting their dinner and tempered window glass across the sidewalk and building. One nearby security camera recorded the pre-impact approach of the striking vehicle, while another adjacent security camera recorded its post impact trajectory. It was observed that the passing vehicle’s tire marks were momentarily identifiable on the wet roadway. The visible tire marks were plotted on the roadway as part of the photogrammetry process of matching the surveillance camera position and orientation to the to-scale 3D laser scan data of the site. While 3D tracking alone can produce highly accurate results, evidence such as the tire markings help refine and validate the accuracy of the 3D tracking of the impacting vehicle in the 3D accident reconstruction analysis.

Laurence R. Penn, CFVT, Senior Forensic Animation/Video Specialist with DJS Associates, Inc., can be reached via email at experts@forensicDJS.com or via phone at 215-659-2010.

Categories: Forensic Video Analysis | Laurence R. Penn, CVFT

Tags: 3D Tracking | Camera Matching | Photogrammetry | Surveillance Video