Radiometric compensation algorithm for color reproduction of projection display on patterned surface  

作　　者：邹文海 徐海松 吕玮阁 

机构地区：[1]State Key Laboratory of Modern Optical Instrumentation Zhejiang University

出　　处：《Chinese Optics Letters》2010年第4期388-391,共4页中国光学快报（英文版）

摘　　要：A novel radiometric compensation algorithm is proposed to correct the color distortions of the projection display on patterned surface.Two choices of the objective image are investigated in this algorithm.A linear compression followed by a sigmoid-function transformation based on the statistical parameters of the compensating radiance map is performed to reduce the clippings of the compensating color and expected to properly reproduce the dynamic range and the visibility of the image content.Three types of projection displays are produced for each test image.The parameter analysis indicates that the compensated displays could well conceal the surface pattern and tend to exhibit higher lightness or lightness contrast in the camera.The comparison results in a psychophysical experiment demonstrate that all the compensated displays outperform the uncompensated ones.The original input images seem more appropriate to be selected as the objective images,and the predicted objectives on the white screen are just proper for the bright and low-contrast input images displayed on the faint surface.A novel radiometric compensation algorithm is proposed to correct the color distortions of the projection display on patterned surface.Two choices of the objective image are investigated in this algorithm.A linear compression followed by a sigmoid-function transformation based on the statistical parameters of the compensating radiance map is performed to reduce the clippings of the compensating color and expected to properly reproduce the dynamic range and the visibility of the image content.Three types of projection displays are produced for each test image.The parameter analysis indicates that the compensated displays could well conceal the surface pattern and tend to exhibit higher lightness or lightness contrast in the camera.The comparison results in a psychophysical experiment demonstrate that all the compensated displays outperform the uncompensated ones.The original input images seem more appropriate to be selected as the objective images,and the predicted objectives on the white screen are just proper for the bright and low-contrast input images displayed on the faint surface.

关 键 词：ALGORITHMS COLOR Color photography Linear transformations RADIOMETRY 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]