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Heritage site preservation with combined radiometric and geometric analysis of TLS data

2017; Elsevier BV; Volume: 85; Linguagem: Inglês

10.1016/j.autcon.2017.09.023

1872-7891

Luis Javier Sánchez-Aparicio, Susana Del Pozo, Luís F. Ramos, Andrés Arce, Francisco M. Fernandes,

Archaeological Research and Protection

Damage mapping is considered a critical stage in the correct diagnosis of the state of conservation of Cultural Heritage manifestations. The common approach generally implies a large user interaction to map the different pathological processes presented on 2D documents such as elevations or sections, among others. In contrast with this practice, the present paper proposes a semiautomatic 3D-methodology, with a minimum user interaction, able to accurately analyse both radiometric and geometric data recovered by a non-contact technology (Terrestrial Laser Scanning), allowing the extraction and quantification of a wide diversity of pathological processes from biological colonization to deformations. This approach is therefore a potential tool for the rapid and accurate diagnosis of Cultural Heritage. To confirm the applicability and potential offered by the proposed methodology, a highly affected historical masonry, the San Francisco Master Gate of the Almeida Fortress (Portugal), was evaluated by using the Faro Focus 3D 120 Laser Scanner.