1. An information processing device comprising: circuitry configured to: acquire a plurality of first study images and an input image; and output an estimated degradation process on a basis of first similarities between an arbitrary region in the input image and respective ones of a plurality of first degraded images when regions corresponding to the regions in the first study images are degraded on a basis of respective ones of a plurality of degradation processes, wherein the estimated degradation process corresponds to a degradation process in the degradation processes, the degradation process being related to the region in the input image.