Analysis method for mixed pigment of cultural relics of colored drawing type

Abstract

The invention discloses an analysis method for the mixed pigment of cultural relics of a colored drawing type, and the method comprises the steps: collecting a wide-band continuous reflection spectrumof an AOI (area of interest) on the surface of a to-be-processed cultural relic of the colored drawing type through a hyperspectral imaging instrument and a ground feature spectrograph; taking the wide-band continuous reflection spectrum as the multisource hybrid information, achieving the pigment decomposition of regions with the same colors through non-negative matrix factorization, and obtaining the reflection spectrum curves of different pigments; carrying out the matching of the reflection spectrum curves of different pigments with the spectrums in a pigment spectrum library, and obtaining the type of the mixed pigment; obtaining the abundance of the pigment of each type through a ratio derivative method based on modes, and obtaining the types and proportion of the color compositionpigments of the surface of the to-be-processed cultural relic of the colored drawing type. The above method can achieve the perpetual maintaining of the digitalized information of pigments of the cultural relics of the colored drawing type, and facilitates the digitalized virtual restoration and entity restoration of the cultural relics.

Description

technical field [0001] The invention relates to the technical field of protection and identification of cultural relics, in particular to an analysis method for mixed pigments of painted cultural relics. Background technique [0002] At present, in the field of cultural relics protection and appraisal technology, the analysis of mixed pigments is a technology that excavates the intrinsic value of ancient calligraphy and painting and provides a scientific basis for its correct evaluation and analysis. However, the lifespan of paper is thousands of years, and the lifespan of silk is 800 years. Even without the influence of environmental and human factors, it is very common for ancient calligraphy and paintings to appear moldy, moth-eaten, stained, damaged, etc. In order to better preserve and display ancient calligraphy and painting works Therefore, it is often necessary to carry out color restoration and reproduction, which requires the determination of the type of pigment. ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are a lot of science and technology applied to the pigment category identification of painted cultural relics, such as X-ray diffraction analysis, fluorescent X-ray analysis, Raman spectrum analysis, electron microscopic analysis, near-infrared spectrum analysis and other technologies. Characteristics such as elements, structure, and external appearance determine the category of the substance, but in most cases, the methods of the prior art require sample preparation for accurate measurement, and sample preparation itself is a process of secondary damage to cultural relics. Due to the particularity of non-renewable cultural relics, the technology used for the analysis of cultural relics should be non-destructive, and the existing technology also lacks solutions for the analysis of mixed pigments

Images