Graffiti Analysis: POV from Evan Roth on Vimeo.

The point-of-view camera is an early experiment towards creating an inexpensive, working solution to passively record graffiti motion data. See the GML Field Recorder Challenge and more about the GML project at http://www.graffitimarkuplanguage.com/ - you may also want to read Why I <3 GML (Graffiti Markup Language)