Abstract
Abstract. The thermal analysis of buildings represents a key-step for reduction of energy consumption, also in the case of Cultural Heritage. Here the complexity of the constructions and the adopted materials might require special analysis and tailored solutions. Infrared Thermography (IRT) is an important non-destructive investigation technique that may aid in the thermal analysis of buildings. The paper reports the application of IRT on a listed building, belonging to the Cultural Heritage and to a residential one, as a demonstration that IRT is a suitable and convenient tool for analysing the existing buildings. The purposes of the analysis are the assessment of the damages and energy efficiency of the building envelope. Since in many cases the complex geometry of historic constructions may involve the thermal analysis, the integration of IRT and accurate 3D models were developed during the latest years. Here authors propose a solution based on the up-to-date photogrammetric solutions for purely image-based 3D modelling, including automatic image orientation/sensor calibration using Structure-from-Motion and dense matching. Thus, an almost fully automatic pipeline for the generation of accurate 3D models showing the temperatures on a building skin in a realistic manner is described, where the only manual task is given by the measurement of a few common points for co-registration of RGB and IR photogrammetric projects.
Highlights
Rehabilitation of the existing building stock is a key measure for reaching the proposed reduction in energy consumption and CO2 emissions in all countries
As the state of the art comprehends some basic techniques for mapping Infrared Thermography (IRT) imagery on simple building models, the integration of 3D models derived from Terrestrial Laser Scanning (TLS)/Photogrammetry to IRT data allows the generation of accurate 3D multispectral models useful for localization, visualization, and analysis of thermal anomalies in buildings (Scaioni et al, 2012)
FINAL DISCUSSION AND FUTURE WORK The paper reports the discussion on the application of Infrared Thermography (IRT) for the analysis of thermal anomalies of Cultural Heritage and existing buildings
Summary
Rehabilitation of the existing building stock is a key measure for reaching the proposed reduction in energy consumption and CO2 emissions in all countries. In the last decades, Infrared Thermography (IRT- see, e.g., Vollmer & Müllmann, 2010) has been contributing up to an impressive extent to the investigation of thermal behaviour of buildings, including the ones belonging to Cultural Heritage (CH), for the maintenance/conservation of façades and the evaluation of the building thermal performances (Grinzato, 2012; Rosina, 2013) The latter is cutting edge application because of the increasing need to improve the energy efficiency of historic buildings as well. The authors have investigated the approach for integrating TLS 3D models and IRT collected using a groundbased thermal cameras
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