THERMAL IMAGE PROCESSING DEVICE, INFRARED IMAGING APPARATUS, THERMAL IMAGE PROCESSING METHOD, AND THERMAL IMAGE PROCESSING PROGRAM

A thermal image processing device includes a thermal image acquiring unit configured to acquire a thermal image detected by an infrared detector provided in a vehicle, an object detecting unit configured to detect an object from the thermal image, a positional relationship calculating unit configured to calculate a positional relationship between the detected object and the vehicle and to calculate a change in the positional relationship, and a determining unit configured to determine whether to calibrate the infrared detector on the basis of the change in the calculated positional relationship.