Thermographic cameras have a modest resolution when compared to an RGB camera. A 640×512 pixel camera offers a frame quality which can be considered suitable for identifying, with significant detail, a silicon panel HOT-SPOT from a height of between 20 meters and 35 meters.
As the dimension increases, the pixel size tends to become too large to safely identify HOT-SPOTs with modest temperature differences. It should also be taken into account that the flight near the points of reflection between the solar panels and the sun is of particular importance in the acquisition with a drone. The solar disk is automatically removed from the orthophoto in relation to the fact that its position is not constant on the panels with the progress of the shooting. In any case, in the region of interest the acquisition is made significant by the peripheral photograms which, typically, are less defined.