Application of hyperspectral imaging technology to digitally protect murals in the Qutan temple

Abstract Hyperspectral imaging technology is a research hotspot in the field of cultural heritage protection. It can be used to quickly and noninvasively obtain detailed spectral information from surfaces relics different categories. We intuitively analyse pigment compositions, line characteristics, painting skills patterns using information. has high scientific significance application value for protection, restoration ancient murals other relics. In this study, mural Daheitian hall Qutan temple, Qinghai Province, China, was as sample. The hyperspectral data were acquired analysed several purposes. Pigment matching abundance inversion carried out distribution. These enhanced by continuum removal histogram stretching hidden dark channel prior, Criminisi Retinex methods virtually restore image mural. results indicated that data, constructed pure spectrum library suitable approaches, types distributions pigments quantitatively analysed, lines extracted. images are helpful identifying or surface materials. Mural enhanced, highlighted enhancement methods, such linear stretching. addition, have unique advantages images, combination defogging inpainting algorithms realize virtual images. brief, found highly favourable effect on analysis, extraction, enhancement, extraction murals.