SAMPLE 5: Measure suspect height and distances between points - photogrammetry
There are several digital forensic steps and techniques one must take and utilize in order to accurately determine the height of a suspect seen in a security surveillance video recording. Specific, detailed measurements and digitally enhanced still-frames from various video camera angles need to be taken in order to properly build a 3D computer model of the location of the incident. Those still-images are then processed within a specialized 3D software program, allowing forensic video experts to get a detailed view of the scene of the incident. Using photogrammetry, NCAVF can create a model and compare it to the recorded surveillance video evidence. In this way, we can get a close approximation of height, distances between points, and the speed of vehicles. To the left are a few images from a specific project.