Information processing device, information processing method, program, and information storage medium

Abstract

The present invention is to provide an information processing device, an information processing method, a program, and an information storage medium with which the accuracy of detection of whether the contact of an object with a subject is present or absent is improved compared with conventional techniques. A frame image acquiring section () acquires plural frame images that include a subject region in which an image of a subject appears and are taken at timings different from each other. A subject partial region identifying section () identifies, about each of the frame images, plural subject partial regions that are each part of the subject region and are different from each other in the position in the subject region. A partial region feature identifying section () identifies partial region features showing variation in an image feature of an image occupying the subject partial region on the basis of the image feature of the image occupying each of the subject partial regions associated with each other in each of the frame images. A contact determining section () determines whether the contact of an object with the subject is present or absent on the basis of a relationship among the partial region features each associated with a respective one of plural subject partial regions.