Mind blowing video of laser-guided graffiti system

My jaw dropped when I watched this video of Graffiti Research Lab's laser graffiti system I blogged last week. You hold a laser pointer in the air, and draw whatever you want. A high-powered laser projection system (hidden in a van) "paints" the image on the surface of a building. Unbelievably cool.
Link | Here's the how-to.

Reader comment:

Aidee says:

Just a correction re the article, in that I thought initially a laser was being used to "paint" the building also. What happens instead, is that a handheld laser-pointer is used to tag the building and a camera discerns the contrast of the laser on the building to then output through a DLP video projector the actual tag. The DLP projector is doing the grunt work of projection and not the laser -- much safer!!

Previously on Boing Boing:
• Graffiti Research Lab's video of Maker Faire
• Make cheap magnetic LEDs for fun graffiti projects
• LED Throwies at Maker Faire
• Share an inflatable studio with artist Huong Ngo