UAS IR-Thermograms Processing and Photogrammetry of Thermal Images for the Inspection of Building Envelopes

Infrared thermography techniques (IRT) are increasingly being applied in non-invasive structural defect detection and building inspection, as they provide accurate surface temperature (ST) ST contrast (Delta-T) information. The common optional or off-the-shelf installation, of both low- high-resolution thermal cameras, on commercial UAS further facilitates the application IRT by enabling aerial imaging for envelope surveys. software used photogrammetry is currently easy to use. increasing computational capacity hardware allows three-dimensional models be obtained from conventional photography, thermal, even multispectral imagery with very short processing times, improving possibilities analysing buildings structures. Therefore, this study, which an extension a previous work, analysis wine cellar, using manual well cameras installed board Unmanned Aerial System (UAS), will presented. Since resolution images much lower than that their nature does not allow representation objects, new, but simple, digital image pre-processing method presented more detailed 3D model. Then, reconstruction, based imagery, performed analysed. limitations each technique also detailed, together anomalies found proposed improvements.