@inproceedings { ref9,
	title            = "Projector-Camera Systems For Immersive Training",
	year             = "2006",
	author           = "Anton Treskunov and Jarrell Pair",
	booktitle        = "Proceedings of the 25th Army Science Conference",
	address          = "Orlando, FL",
	doi              = "10.13140/RG.2.1.4855.0889",
	url              = "http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA461567",
	abstract         = "Real time computer graphics are limited in that they
can only be displayed on projection screens and monitors.
Monitors and projection screens cannot be used in live
fire training or scenarios in which the displays could be
physically damaged by trainees. To address this issue, we
have developed projection systems using computer vision
based color correction and image processing to project
onto non-ideal surfaces such as painted walls, cinder
blocks, and concrete floors. These projector-camera
systems effectively paint the real world with digital light.
Any surface can become an interactive projection screen
allowing unprepared spaces to be transformed into an
immersive environment. Virtual bullet holes, charring,
and cracks can be added to real doors, walls, tables,
chairs, cabinets, and windows. Distortion correction
algorithms allow positioning of projection devices out of
the field of view of trainees and their weapons. This
paper describes our motivation and approach for
implementing projector-camera systems for use within the
FlatWorld wide area mixed reality system."}