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Abstract
Abstract. Hyperspectral remote sensing is a completely non-invasive technology for measurement of cultural relics, and has been successfully applied in identification and analysis of pigments of Chinese historical paintings. Although the phenomenon of mixing pigments is very usual in Chinese historical paintings, the quantitative analysis of the mixing pigments in the ancient paintings is still unsolved. In this research, we took two typical mineral pigments, vermilion and stone yellow as example, made precisely mixed samples using these two kinds of pigments, and measured their spectra in the laboratory. For the mixing spectra, both fully constrained least square (FCLS) method and derivative of ratio spectroscopy (DRS) were performed. Experimental results showed that the mixing spectra of vermilion and stone yellow had strong nonlinear mixing characteristics, but at some bands linear unmixing could also achieve satisfactory results. DRS using strong linear bands can reach much higher accuracy than that of FCLS using full bands.
Highlights
Chinese historical heavy-color painting is an important form of Chinese traditional paintings, which has great historical and cultural values
There is great differences between abundances of end elements of vermillion and stone-yellow by the full wave spectrum unmixing inversion and abundance of actual, root mean square error is 0.2828, unmixing accuracy is low, it shows that the vermillion, stone-yellow mixture mineral pigments do not conform to the linear mixed model in general, nonlinear mixed features performed stronger
The mixing spectra of vermilion and stone-yellow powders were analyzed by full-band spectral unmixing and single-band spectral unmixing respectively
Summary
Chinese historical heavy-color painting is an important form of Chinese traditional paintings, which has great historical and cultural values. There were many kinds of pigments used in Chinese historical heavy-color paintings, and most of them were mineral pigments(Wu et al, 2014). Most of the ingredients preserved in Chinese historical heavy-color painting are mineral pigments. There has always been a great deal of interest in historic artwork with respect to their cultural significance and the physical composition of their materials. Through the analysis of ancient paintings' pigments, the researchers can authenticate the date and origin of cultural relics. It can provide important reference information for the preservation and restoration of cultural relics by the analysis(Cloutis et al, 2011)
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