Spectral data compression using weighted principal component analysis with consideration of human visual system and light sources

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• 作者：Qian Cao ; Xiaoxia Wan ; Junfeng Li ; Qiang Liu ; Jingxing Liang ; Chan Li
• 关键词：Spectral color reproduction ; Spectral data compression ; Dimensional reduction ; Weighted principal component analysis ; Light source ; Human visual system
• 刊名：Optical Review
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：23
• 期：5
• 页码：753-764
• 全文大小：1,925 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Electromagnetism, Optics and Lasers
  
• 出版者：The Optical Society of Japan, co-published with Springer-Verlag GmbH
• ISSN：1349-9432
• 卷排序：23

文摘

This paper proposed two weight functions based on principal component analysis (PCA) to reserve more colorimetric information in spectral data compression process. One weight function consisted of the CIE XYZ color-matching functions representing the characteristic of the human visual system, while another was made up of the CIE XYZ color-matching functions of human visual system and relative spectral power distribution of the CIE standard illuminant D65. The improvement obtained from the proposed two methods were tested to compress and reconstruct the reflectance spectra of 1600 glossy Munsell color chips and 1950 Natural Color System color chips as well as six multispectral images. The performance was evaluated by the mean values of color difference under the CIE 1931 standard colorimetric observer and the CIE standard illuminant D65 and A. The mean values of root mean square errors between the original and reconstructed spectra were also calculated. The experimental results show that the proposed two methods significantly outperform the standard PCA and another two weighted PCA in the aspects of colorimetric reconstruction accuracy with very slight degradation in spectral reconstruction accuracy. In addition, weight functions with the CIE standard illuminant D65 can improve the colorimetric reconstruction accuracy compared to weight functions without the CIE standard illuminant D65.