2023/03/21 by L. Buffarini, Buffarini, L., H. J. Rabal +9
Arts and Humanities · Engineering · #Advanced Optical Imaging Technologies #Cultural Heritage Materials Analysis #FOS: Electrical engineering #FOS: Physical sciences #Image and Video Processing (eess.IV) #Optics (physics.optics) #Surface Roughness and Optical Measurements #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2303.12098
openalex publication_date 2023/03/21 · openalex created_date 2023/03/25 · openalex updated_date 2026/07/28
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.