1. An information processing device comprising: a detection unit that detects a face image region in an image; a determination unit that determines a human attribute of at least one face image in the face image region detected by the detection unit; and a face image replacement unit that replaces the at least one face image with a natural face image of another person according to the human attribute determined by the determination unit and also according to a second attribute, wherein the second attribute is determined from metadata added to the image when the image is originally captured, and wherein the detection unit, the determination unit, and the face image replacement unit are each implemented via at least one processor.