Radiometric compensation for procam system based on anchoring theory

Abstract

For a procam system consisting of a projector and a camera, the chroma distortion of an image projected on a non-white surface can be compensated by increasing the intensity of the complementary color of the projection surface. However, this inevitably trades image brightness for chroma correctness because the required intensity often outreaches the projector's dynamic range. In this paper, we propose a solution for the compensation problem using the anchoring theory of lightness perception. A notable feature of our technique is that it takes the chromatic adaptation and viewing condition into account, which leads to a better characterization of the image quality perceived by human eyes. As a result, the compensated image appears much closer to the original image. A computational framework for the tradeoff between brightness and chroma distortion is derived, and the performance of the proposed algorithm is verified by subjective experiments.