Locating a projector using the strength of beams reflected on a screen
AUIC '07 Proceedings of the eight Australasian conference on User interface - Volume 64
Calibrating multi-projector cylindrically curved displays for "wallpaper" projection
PROCAMS '08 Proceedings of the 5th ACM/IEEE International Workshop on Projector camera systems
Color mixing property of a projector-camera system
PROCAMS '08 Proceedings of the 5th ACM/IEEE International Workshop on Projector camera systems
From the Rendering Equation to Stratified Light Transport Inversion
International Journal of Computer Vision
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A theory for photometric calibration of cameras and multiple projectors with overlapping displays is presented. The theory is predominantly based on the analysis of isointensity curves in projector input state spacecurves which define different projector input intensity combinations that result in the same camera-observed pixel intensities. Three methods, which have different speed and accuracy tradeoffs, are proposed for recovering the projector-to-screen and screento- camera intensity transfer functions. The methods do not require a specific parametric model for the shapes of these functions, nor impose any smoothness constraints. Additional methods are described for calibrating projector offsets and binary light sources, and also extending the perpixel analysis to other pixels in the display. The methods do not require the use of expensive equipment, and may be carried out with a low dynamic range camera with minimal controls.