A portable hyperspectral device (ASD-FieldSpec FR Pro) has been employed for the characterization of alterations affecting the marble facade of the Santa Maria Novella church (XIII cent.) in Florence (Italy). The ASD-FieldSpec FR Pro collects the reflectance spectra of a selected target area (about 1.5 cm2). The spectra of calcite, gypsum and other mineral phases commonly occurring on outdoor surfaces exposed to the urban atmosphere were collected and presented. The spectral features of alteration minerals (depth of reflectance minima) appear to be affected by grain size, phase abundance in addition to lightness (L*) of the target area. Notwithstanding these limitations, the spectra may be used for a qualitative screening of the alteration and, under reasonable assumptions, the reflectance band depth may be used also for quantitative estimation of phase abundance. The monitoring of the conservation state of outdoor surfaces is considered of fundamental importance to plan conservative interventions on historical buildings. Our results point out that portable hyperspectral instruments may be considered as powerful tools for characterizing historical surfaces in a nondestructive and noninvasive way.

Hyperspectral sensor for gypsum detection on monumental buildings / Camaiti M.; Vettori S.; Benvenuti M. ; Chiarantini L. ; Costagliola P.; Di Benedetto F.; Moretti S.; Paba F.; Pecchioni E.. - In: JOURNAL OF GEOPHYSICS AND ENGINEERING. - ISSN 1742-2132. - STAMPA. - 8(3):(2011), pp. 126-131. [10.1088/1742-2132/8/3/S12]

Hyperspectral sensor for gypsum detection on monumental buildings

VETTORI, SILVIA;BENVENUTI, MARCO;CHIARANTINI, LAURA;COSTAGLIOLA, PILARIO;DI BENEDETTO, FRANCESCO;MORETTI, SANDRO;PECCHIONI, ELENA
2011

Abstract

A portable hyperspectral device (ASD-FieldSpec FR Pro) has been employed for the characterization of alterations affecting the marble facade of the Santa Maria Novella church (XIII cent.) in Florence (Italy). The ASD-FieldSpec FR Pro collects the reflectance spectra of a selected target area (about 1.5 cm2). The spectra of calcite, gypsum and other mineral phases commonly occurring on outdoor surfaces exposed to the urban atmosphere were collected and presented. The spectral features of alteration minerals (depth of reflectance minima) appear to be affected by grain size, phase abundance in addition to lightness (L*) of the target area. Notwithstanding these limitations, the spectra may be used for a qualitative screening of the alteration and, under reasonable assumptions, the reflectance band depth may be used also for quantitative estimation of phase abundance. The monitoring of the conservation state of outdoor surfaces is considered of fundamental importance to plan conservative interventions on historical buildings. Our results point out that portable hyperspectral instruments may be considered as powerful tools for characterizing historical surfaces in a nondestructive and noninvasive way.
2011
8(3)
126
131
Camaiti M.; Vettori S.; Benvenuti M. ; Chiarantini L. ; Costagliola P.; Di Benedetto F.; Moretti S.; Paba F.; Pecchioni E.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/490056
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