Spectral Reflectance Reconstruction with Nonlinear Composite Model of the Metameric Black
WANG Jia-jia1, LIAO Ning-fang1*, WU Wen-min1, CAO Bin1, LI Ya-sheng1, CHENG Hao-bo2
1. Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China 2. Shenzhen Research Institute, Beijing Institute of Technology, Shenzhen 518057, China
Abstract：Metamerism phenomenon is an important problem in spectral reflectance reconstruction and color reproduction. In this paper, a 3-primary color CCD camera is used to acquire spectral information in CIE standard illuminant D65 and a nonlinear composite model is established, including principal component analysis and neural network method (PCA-NET) to modify the Matrix R Method based on the Metameric Black theory. The standard Munsell color card is used in spectral reflectance reconstruction experiment and the results are evaluated and discussed. The experimental results verified that the PCA-NET algorithm can accurately fit the nonlinear relationship between the output signal of the camera and the principal component coefficients; and it can be used in the R matrix algorithm instead of the linear algorithm; the new method can serve as a promising technique for building a spectral image database whihc is better than the original Matrix R Method. In the fixed illumination environment, the mean RMS of the test set is 0.76 improved, and the mean STD of the test set is 0.85 improved, which can effectively improve the accuracy of spectral reflectance reconstruction. The modified matrix R method has the advantages of higher accuracy and easy implementation, and it can be used in the field of color reproduction and spectral reflectance reconstruction.
Key words：Spectral reflectance reconstruction;Spectral color reproduction;PCA;Neural network;The Modified Matrix R Method
王佳佳1，廖宁放1*，吴文敏1，曹 斌1，李亚生1，程颢波2 . 基于同色异谱黑理论的非线性复合模型光谱重建研究 [J]. 光谱学与光谱分析, 2017, 37(03): 704-709.
WANG Jia-jia1, LIAO Ning-fang1*, WU Wen-min1, CAO Bin1, LI Ya-sheng1, CHENG Hao-bo2 . Spectral Reflectance Reconstruction with Nonlinear Composite Model of the Metameric Black . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(03): 704-709.
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