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- Title
Suitability of hyperspectral imaging technique to evaluate the effectiveness of the cleaning of a crustose lichen developed on granite.
- Authors
Pozo-Antonio, J.; Fiorucci, M.; Rivas, T.; López, A.; Ramil, A.; Barral, D.
- Abstract
The aim of this paper was to evaluate the effectiveness of the laser cleaning of a complex biogenic patina, a crustose lichen, by means of hyperspectral imaging techniques. Samples of a Hercynian granite from NW Spain colonised by an endolithic crustose lichen ( Pertusaria amara) were collected and cleaned following three procedures: a scalpel, the third harmonic of a Nd:YVO ns laser and the scalpel followed by the laser. The suitability of the hyperspectral camera as a non-destructive, online, fast and in situ monitoring technique to assess the effectiveness of the cleaning was evaluated using optical microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and colour measurements in CIELAB space. The hyperspectral imaging technique allowed us to measure the reflectivity variations of the cleaned surfaces in a non-invasive way, allowing the identification of the cleaning effectiveness of each procedure. Nevertheless, the results of the hyperspectral imaging technique must be validated by conventional techniques.
- Subjects
HYPERSPECTRAL imaging systems; CRUSTOSE lichens; GRANITE; MICROSCOPY; SCANNING electron microscopy; FOURIER transform infrared spectroscopy; COLORIMETRY
- Publication
Applied Physics A: Materials Science & Processing, 2016, Vol 122, Issue 2, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-016-9634-5