Colour, reflectance and temperature. From the case study of Villa Trissino to new integrated applications of terrestrial lidar data for surveying and diagnostics
Keywords:
Color, lighting, visual perception, digital, designAbstract
New all-in-one laser scanning technologies applied to architectural surveying are proving to be effective, flexible, economical and expeditious, enabling the acquisition, within homologous detections, of different types of data. The literature on this subject is extensive and details the potential for morphological, textural and even colorimetric detection of artefacts. The now well-known techniques of mapping photographic images with a point cloud allow the spatial datum to be complemented point by point with the colour datum (RGB), in HR photographs. To support a good reading of the surface, the operator uses the reflectance value (R), generating graduated maps that enable visual recognition of the scanned elements. This applied research analyses and discusses the laser scanning reflectance of the case study Villa Trissino in Cricoli and the integration between reflectance maps and thermographic images of the case study Chiesa di San Filippo in Cagli. The two cases demonstrate that this type of investigation obtains essential information for subsequent restoration work that cannot be detected with the naked eye.
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