Calibrating multi-projector cylindrically curved displays for "wallpaper" projection

Authors:
Wei Sun;Irwin Sobel;Bruce Culbertson;Dan Gelb;Ian Robinson
Affiliations:
Hewlett-Packard Laboratories, Palo Alto, California;Hewlett-Packard Laboratories, Palo Alto, California;Hewlett-Packard Laboratories, Palo Alto, California;Hewlett-Packard Laboratories, Palo Alto, California;Hewlett-Packard Laboratories, Palo Alto, California
Venue:
PROCAMS '08 Proceedings of the 5th ACM/IEEE International Workshop on Projector camera systems
Year:
2008

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Abstract

This paper presents a novel algorithm for calibrating multiple casually placed projectors, via a single uncalibrated camera, to produce a "wallpaper" projection, which is equivalent to printing a single image onto a flat sheet of paper and pasting it to the screen. Based on a piecewise planar model, the method described here combines the advantages of global surface fitting and homographies to generate high accuracy geometric correction independent of the camera position and viewing angle. Experimental results validate the approach, achieving seamless displays with various multi-projector arrangements. The proposed calibration mechanism is applicable to both curved and planar screen surfaces and to single as well as multiple projector displays.