1. An image processing system comprising: an acquiring component that captures a subject to thereby acquire moving image data representing that subject; a region specifying component that specifies one or more playing regions for generating predetermined sounds in an image represented by the moving image data that have been acquired by the acquiring component; a detecting component that detects a specific image showing a specific subject existing in the image represented by the moving image data that have been acquired by the acquiring component; an assigning component that assigns, for each of the playing regions that have been specified by the region specifying component, sounds to be outputted in a case where the specific image that has been detected by the detecting component overlaps those playing regions; and a signal outputting component which, in a case where the specific image overlaps the playing regions, outputs signals representing the sounds that have been assigned to those playing regions by the assigning component.