A study on the true color restoration perceived by eyes of color object surfaces under non-white illumination
(0) Color of an object surface is a constant property of the object. With non-white illumination, however,the perceived color of an object is affected by the color of the illuminant itself and so it is necessary forus to consider the true color of object surfaces perceived by vision system instead of the reflected color ofsuch. This paper presents an approach capable of obtaining the true color images of objects recorded underthe color light sources. Two special matrixes used to convert the RGB color values captured directly by acamera into the desired objectively RGB values are provided. Moreover, a model based on Edwin Land theorywhich can explain successfully color constancy of the eyes is realized. Ten color images with differentcontents for experiments are photographed using a 12-bit digital camera, under separately the red, green, blueand yellow color lights, with a full control of lightings in the laboratory. These forty color images capturedare also converted using respectively the proposed method and model. Research results indicate that colors ofimages obtained from the former are similar to those from the latter. The true colors of objects recorded undercolor lights are restored successfully, which are almost identical with colors recorded under the white lights.The feasibility of this conversion with better potential of applications in many areas such as color recognition,color reproduction, packaging and printing etc. is demonstrated successfully by experiments.
Chen Yongl-li Liu Wen-xia
College of Packaging & Printing Engineering Tianjin University of Science & Technology Tianjin, China
国际会议
The 17th IAPRI World Conference on Packaging(第17届世界包装大会)
天津
英文
50-53
2010-10-12（万方平台首次上网日期，不代表论文的发表时间）