FSC239Y5 Lecture 1: 3D Forensics
Document Summary
3d forensics: from subjectivity to quantitative analysis (ai2 -3d) helen guryn. Recreation creative work (may rely on testimony or other non-physical sources) How can we remove subjectivity: lord kelvin physical evidence will tell more. Could use 3-d on small objects, large scenes: e. g. t-shirt: lay shirt out and figure out if there"s holes. Structured light scanners project pulses of light in a pattern and bend lines: fringe patterns, used on smaller things (e. g. bullet casing, shoe prints) Photogrammetry (has dept: tires/impressions, aerial (aircrafts, 3d maps) Laser scanners lidar light detection and ranging laser light amplification through stimulated. Time of light flight measurement measures the speed of light then divide by two (measure light there and back: phase based scanners (unique combination sends continuous light, any point is measurable. Blood stain analysis take info with laser scanner: bloodstain area of origin. Camera matching estimating speed of vehicles: suspect height analysis.
