Reading hidden writing and drawings on papyrus using speckle optical technique and multispectral images

Autor:	Buffarini, L., Rabal, H. J., Cap, N. L., Grumel, E. E., Trivi, M., Tebaldi, M.
Rok vydání:	2023
Předmět:	Electrical Engineering and Systems Science - Image and Video Processing Physics - Optics
Druh dokumentu:	Working Paper
Popis:	We carried out an experimental set-up for reading a hidden drawing under papyrus using an optical technique based on the speckle phenomenon that is observed when a rough surface is illuminated by laser light. We propose the use of several wavelengths of light illumination and adaptive algorithms to process the speckle images. We employ a set of filters to produce better discrimination of the results as visually judged. This approach is a cheap and relatively simple non-destructive and non-invasive procedure that could be extended to other painted objects or subsurface hidings of archaeological interest, as well as, to other dynamic speckle experiments. Comment: 18 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2303.12098 Zobrazit plný text záznamu View this record from Arxiv