Towards the definition of a low-cost toolbox for qualitative inspection of painted historical vaults by means of modified DSLR cameras, open source programs and signal processing techniques

Luca Piroddi, Sergio Vincenzo Calcina, Antonio Trogu, Giulio Vignoli

    Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

    6 Citationer (Scopus)

    Resumé

    Historical architecture is a primary element containing the identity values of a society. The wide diffusion of many ancient buildings gathering part of these values on painting walls over territories often characterized by poor technological or economic resources brings to consider the development of low-cost protocols to inspect valued surfaces and to give the authorities in charge of preservation and restoration adequate technical information. Here we present the preliminary results of a recent application of remote sensing micro-geophysical techniques to typical architectural targets such as vaults. A modified commercial Digital Single-Lens Reflex (DSLR) camera was used to acquire multispectral datasets on portions of a painted vault. Multispectral datasets were used raw or after the application of a pre-processing step with a Multi Images Stacking (MIS) algorithm. Multispectral images were then processed with spatial wavelet decomposition, histogram enhancing, thresholds application, image fusion, false colors compositing and Principal Component Analysis (PCA) techniques. Software used have been GNU Image Manipulation Program (GIMP) and Mathworks MATLAB (which can be substituted for the processing steps proposed by the built-in functions of GNU OCTAVE open-source software). Processed images were able to highlight features on vault paintings revealing details of the surface or its very shallow layers which were impossible or very difficult to distinguish in raw data. In fact, they emphasized low-visible details, differences in apparently similar finishes or pigments, cracks and probably details of surface preparation.

    OriginalsprogEngelsk
    TitelComputational Science and Its Applications – ICCSA 2020
    Undertitel20th International Conference, Cagliari, Italy, July 1–4, 2020, Proceedings, Part VII
    RedaktørerOsvaldo Gervasi, Beniamino Murgante, Sanjay Misra, Chiara Garau, Ivan Blecic, David Taniar, Bernady O. Apduhan, Ana Maria A.C. Rocha, Eufemia Tarantino, Carmelo Maria Torre, Yeliz Karaca
    ForlagSpringer
    Sider971-991
    Antal sider21
    ISBN (Trykt)978-3-030-58819-9
    DOI
    StatusUdgivet - 2020
    Begivenhed20th International Conference on Computational Science and Its Applications, ICCSA 2020 - Cagliari, Italien
    Varighed: 1 jul. 20204 jul. 2020

    Publikationsserier

    NavnLecture Notes in Computer Science
    Vol/bind12255
    ISSN0302-9743

    Konference

    Konference20th International Conference on Computational Science and Its Applications, ICCSA 2020
    Land/OmrådeItalien
    ByCagliari
    Periode1/07/204/07/20

    Programområde

    • Programområde 2: Vandressourcer

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