"The technology is rapidly replacing the old days of crime-scene investigators crafting hand sketches and using tape measures to laboriously take down measurements. It centers around a device that looks, at first glance, like a camera, which is its but it can create 3D-like images. It's roughly as big as a shoebox and sits atop a tripod and holds a spinning mirror and a laser. The device rotates 360 degrees, also scanning vertically."
"It first snaps hundreds of thousands of measurements, crafting a 3D model of the scene. Then, it takes a stream of color photographs."
"In the old days, you would just use a tape measure, said Steve Gardner, a forensic services supervisor with the Anaheim Police Department. Now, you have hundreds of thousands of measurements."
Law-enforcement agencies increasingly use 3D laser scanners to speed crime-scene measurement and evidence collection. The devices resemble cameras, roughly the size of a shoebox, mounted on tripods with spinning mirrors and lasers. Scanners rotate 360 degrees and scan vertically, capturing hundreds of thousands of distance measurements. Measurement data combined with streams of color photographs produce colorized point-cloud 3D models. The technology originated in construction and surveying and is now adopted for forensic documentation. Scanners reduce on-scene time, replace hand sketches and tape measures, and allow analysts to revisit scenes virtually and extract precise measurements after investigators leave.
Read at www.ocregister.com
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