Avoiding Seams On High-Resolution Multi-Projector Displays using An Un-calibrated Camera
Report ID: TR-618-00Author: Housel, Timothy / Chen, Yuqun / Finkelstein, Adam / Li, Kai / Clark, Douglas W.
Date: 2000-06-00
Pages: 11
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Abstract:
A scalable, high-resolution display may be constructed by tiling many projected images over a single display surface. One fundamental challenge for such a display is to avoid visible seams due to both misalignment and variations in color balance among the projectors. Traditional methods for avoiding seams involve sophisticated mechanical devices and expensive CRT projectors, coupled with extensive human effort for fine-tuning the projectors. This paper describes three methods that facilitate seamless imaging on a multi-projector display: automatic alignment, automatic color balance, and optical blending. These methods rely on an inexpensive, uncalibrated camera to measure the relative mismatches between neighboring projectors, and then correct the projected imagery to avoid seams without significant human effort.