IMAGE DATA SORTING DEVICE AND IMAGE DATA SORTING METHOD

The image data sorting device is configured with a characteristic value extraction unit that extracts from an image data piece a characteristic value of the image data piece; a relation evaluation unit that evaluates a mutual relation between the characteristic values extracted from plural image data pieces; a clustering unit that executes clustering to events expressed by the characteristic values of the plural image data pieces on the basis of the evaluation result of the above relation; and a sorting register unit that sorts the plural image data pieces on the basis of the result of the above clustering. The image data sorting device with the above configuration can provide a user with facility of use, whereby the appropriateness of the sorting can be secured without requiring any preprocessing, etc., and automatic sorting of the image data pieces can be carried out independently of the types of the image data pieces.