Infrared Feature Extraction and Damage Reconstruction

After a period of thermal excitation of a specimen, changes in the temperature field of the surface are recorded in different infrared thermal images, forming an infrared thermal image sequence consisting of multiple frames. The presence of defects affect the change in the thermal response of a local area and the physical information specific to the damage is embedded in the infrared thermal image sequence. It is therefore essential to extract the features corresponding to the defect from the infrared thermal image sequence.