“…Similarly, the combination of the spot temperature with the temperature difference of two similar components and the maximum admissible temperature of the component was used in [9,10], the difference of the maximum and the minimum temperatures in the object, and the surrounding area, respectively, was designed. In [11], the authors used statistical features computed making use the pixel intensities of the image regions. The considered features were the maximum, minimum, mean and the standard deviation of intensity level.…”