Multispectral Imaging of Degraded Parchment
2013; Springer Science+Business Media; Linguagem: Inglês
10.1007/978-3-642-36700-7_12
ISSN1611-3349
AutoresLindsay W. MacDonald, Alejandro Giacometti, Alberto Campagnolo, Stuart Robson, Tim Weyrich, Melissa Terras, Adam Gibson,
Tópico(s)Industrial Vision Systems and Defect Detection
ResumoMultispectral imaging was employed to collect data on the degradation of an 18th century parchment by a series of physical and chemical treatments. Each sample was photographed before and after treatment by a monochrome digital camera with 21 narrow-band filters, with the objective of assessing algorithms for recovery of text from the images. A template-matching technique was used to detect the circular holes in each sample and a four-point projective transform to register the 21 images. Colour accuracy was verified by comparison of reconstructed spectra with measurements by spectrophotometer.
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