Fuzzy Logic for Identifying Pigments Studied by Raman Spectroscopy

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Fuzzy logic and linguistic variables are used for the automatic interpretation of Raman spectra obtained from pigments found in cultural heritage art objects. Featured bands are extracted from a Raman spectrum of a reference pigment and the methodology for constructing the library is illustrated. An unknown spectrum is then interpreted automatically and a process for identifying the corresponding pigment is described. A reference library consisting of 32 pigments was built and the effectiveness of the algorithm was tested by the Raman spectroscopic analysis of 10 pigments that are known to have been extensively used in Byzantine hagiography. Binary mixtures of these pigments were also tested. The algorithm's level of identification was good even though extra peaks, noise, and background signals were encountered in the spectra.

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702041389274

Affiliations: Department of Analytical Chemistry and Organic Chemistry. Universitat Rovira i Virgili, Pl. Imperial 1, 43005, Tarragona, Spain

Publication date: July 1, 2004

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