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Proceedings Paper

Real reproduction and evaluation of color based on BRDF method
Author(s): Feng Qin; Weiping Yang; Jia Yang; Hongning Li; Yanlin Luo; Hongli Long
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Paper Abstract

It is difficult to reproduce the original color of targets really in different illuminating environment using the traditional methods. So a function which can reconstruct the characteristics of reflection about every point on the surface of target is required urgently to improve the authenticity of color reproduction, which known as the Bidirectional Reflectance Distribution Function(BRDF). A method of color reproduction based on the BRDF measurement is introduced in this paper. Radiometry is combined with the colorimetric theories to measure the irradiance and radiance of GretagMacbeth 24 ColorChecker by using PR-715 Radiation Spectrophotometer of PHOTO RESEARCH, Inc, USA. The BRDF and BRF (Bidirectional Reflectance Factor) values of every color piece corresponding to the reference area are calculated according to irradiance and radiance, thus color tristimulus values of 24 ColorChecker are reconstructed. The results reconstructed by BRDF method are compared with values calculated by the reflectance using PR-715, at last, the chromaticity coordinates in color space and color difference between each other are analyzed. The experimental result shows average color difference and sample standard deviation between the method proposed in this paper and traditional reconstruction method depended on reflectance are 2.567 and 1.3049 respectively. The conclusion indicates that the method of color reproduction based on BRDF has the more obvious advantages to describe the color information of object than the reflectance in hemisphere space through the theoretical and experimental analysis. This method proposed in this paper is effective and feasible during the research of reproducing the chromaticity.

Paper Details

Date Published: 19 December 2013
PDF: 8 pages
Proc. SPIE 9045, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology, 90451D (19 December 2013); doi: 10.1117/12.2036665
Show Author Affiliations
Feng Qin, Yunnan Normal Univ. (China)
Weiping Yang, Yunnan Normal Univ. (China)
Jia Yang, Yunnan Normal Univ. (China)
Hongning Li, Yunnan Normal Univ. (China)
Yanlin Luo, Yunnan Normal Univ. (China)
Hongli Long, Yunnan Normal Univ. (China)

Published in SPIE Proceedings Vol. 9045:
2013 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology
Xinggang Lin; Jesse Zheng, Editor(s)

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