Detailed picture of a bovine animal after applying the methodology
[Credit: Aroa Gutiérrez Alonso]
Two researchers from Universidad Politécnica de Madrid (UPM) in collaboration with a researcher from Czech University of Life Sciences Prague (CULS) have developed a methodology to detect archaeological elements invisible to the naked eye.
Starting from photographs taken with common digital cameras and the range of the visible spectrum, a team of researchers from School of Land Surveying, Geodesy and Mapping Engineering at UPM and Faculty of Environmental Sciences from CULS suggest a new non-invasive methodology of archaeological documentation and analysis to show digital elements that are invisible to the naked eye. The method consists of applying techniques of both remote sensing and spectral treatment in order to uncover hidden elements and later carry out their morphometric analysis.
Mercedes Farjas, Aroa Gutiérrez and José Antonio Domínguez started by studying a limestone mold in the lab. The first goal was to assess the influence of the angle of the light of the photographs.
Later, after studying the effect of diverse filters on the mold, the researchers carried out combination tests of the filters in order to create a protocol of sequential application that allowed them to obtain conclusive results. As a result of these tests, they selected a set of filters and established an order of application.