Abstract: Disclosed is an image processing device that includes: a matching processing unit that performs matching processing on an input image based on one or a plurality of preregistered templates; an interaction unit that outputs a result indicating a range of each region extracted from the input image assuming that the region matches one of the templates, and that receives from a user an input regarding whether an extraction result of each region is proper; and a control unit that executes optimization processing of a parameter to be used for the matching processing when there has been an input that the extraction result is not proper, and that executes update processing of the template according to success or failure of the matching result of each extracted region when there has been an input that the extraction result is proper.