Patent ID: 8340468

Claim:
A temperature measuring device comprising: a feature point choosing means for choosing a single feature point or multiple feature points from a heat image of a measurement object; a corrected heat image generating means for generating a corrected heat image by means of performing one or more image-processing to the heat image including rotating, sliding, enlarging and reducing in such a way that the feature point(s) of the heat image is (are) superimposed on a reference feature point(s) of a reference heat image picked up in advance, on the basis of a coordinate(s) of the feature point(s) of the heat image chosen by the feature point choosing means and a coordinate(s) of the reference point(s) of the reference heat image set in advance; and a difference heat image generating means for generating a difference image as difference between the corrected heat image and the reference heat image, with the corrected heat image generated being superimposed on the reference image in such a way that the feature point(s) of the corrected heat image is (are) superimposed on the reference feature point(s) of the reference heat image, wherein one or more points of the feature point(s) in the heat image is (are) single pixel or a cluster of pixels of the heat image and displaying the highest or lowest temperature in predetermined area(s) set in the heat image, and wherein one or more points of the reference feature point(s) in the reference heat image is (are) single pixel or a cluster of pixels of the reference heat image and displaying the highest or lowest temperature in predetermined area(s) set in the reference heat image.