Classification device, classification method, program, and information recording medium

Abstract

Provided is a classification device to classify an image by identifying, on a photograph on which a target belonging to one of a plurality of groups is captured, a portion that characterizes a single group. An acquirer acquires learning images obtained by dividing a learning photograph, the acquirer associating the learning images with a group to which a learning target captured on the learning photograph belongs; a first learner learns a first model for applying dimensionality reduction to the learning images, classifying them, and calculating score vectors; an associator calculates a representative degree vector that represents the degree to which each class represents each group and associates each class with a group, based on the calculated representative degree vectors; a receiver receives determination images obtained by dividing a determination photograph; and an identifier classifies each determination image to one of the classes, using the first model, and identifies the group associated with the class into which the image is classified.