Abstract
A procam system consists of a projector and a camera. In this paper, a radiometric compensation scheme is proposed for improving the projection quality of a procam system that uses a nearby non-white wall as the projection screen. The compensation scheme is capable of correcting the radiometric errors such as chroma and brightness distortions caused by the projection surface and the ambient light. It is also capable of compensating the effects of nonlinear spectral response (including vignetting) of the procam system. These important functions are achieved through a computational framework that optimizes the tradeoff between chroma and brightness distortions of the projected image and accelerates the computation of the penalty in the optimization process. Experimental results are shown to demonstrate the performance of the proposed radiometric compensation scheme.
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