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Aerial thermal imaging is an ideal tool for primary large-area detection of heat loss in building roofs. The thermal camera is mounted on the aircraft the same way as usual digital camera and the images are treated in a similar manner.
The result of thermal imaging is an orthophotomap, including color code corresponding to level of the heat loss. The position of roofs corresponds to its real position due to low flight altitude and a narrow camera field of view. For this reason, the buildings may be cut from the images according to buildings top view measured stereographically, and the cut roofs may be easily classified according to predefined heat loss classes. This method allows fast detection of potential problems, which will be focused on during a detailed terrestrial heat audit.
