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http://dx.doi.org/10.6109/jkiice.2010.14.1.213

A color compensation method for a projector considering non-flatness of color screen and mean lightness of the projected image  

Sung, Soo-Jin (경북대학교 대학원 전자공학과)
Lee, Cheol-Hee (안동대학교 컴퓨터공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.14, no.1, 2010 , pp. 213-224 More about this Journal
Abstract
In this paper, we propose an algorithm both geometric correction using a grid point image and radiometric adaptive projection that dependent upon the luminance of the input image and that of the background. This method projects and captures the grid point image then calculates the geometrically corrected position by difference between the two images. Next, to compensate color, a corrected image is calculated by the ratio divided luminance of an input image by luminance of arbitrary surface. In addition, we found the scaling factor which controls the contrast to avoid clipping error. At this time, the scaling factor is dependent on mean image lightness when background is determined. Experimental results show that the proposed method achieves good performance and is able to reduce the perceived color clipping and artifacts, better approximating the projection on a white screen.
Keywords
Projector; Color Collection; Radiometric Compensation; Color Screen;
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