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18 May 2012 High-resolution texturing of building facades with thermal images
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Abstract
This paper presents two methodologies able to map a block of IR thermal and RGB images on 3D models derived from terrestrial laser scanning surveying. Proposed methods stand out from other traditional approaches that are mainly based on the projection of single images through approximate models. The first method is a rigorous photogrammetric orientation through a bundle adjustment integrating both RGB and thermal data. Then, another complementary solution based on the use of a calibrated 'bi-camera' system is illustrated. Both methods allows one to texture building facades (reconstructed with 3D models) with their temperature values. Finally, several products can be extracted and managed in different data processing environments: triangulated models to visualize 3D spatial information and to analyze 3D heating diffusion on the surface; raster datasets (e.g. orthophotos or rectified images) with temperature as radiometric value. Both approaches were tested on different buildings of Politecnico di Milano University, where a restoration project of historical and modern facades is currently work in progress.
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Marco Scaioni, Elisabetta Rosina, Luigi Barazzetti, Mattia Previtali, and Veronica Redaelli "High-resolution texturing of building facades with thermal images", Proc. SPIE 8354, Thermosense: Thermal Infrared Applications XXXIV, 83540I (18 May 2012); https://doi.org/10.1117/12.920613
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