1. An image processing apparatus which performs an image modifying process with respect to an original image input via an image input section, comprising: a processing region setting section which sets a processing region in the original image input via the image input section, an image forming section which forms a patch image to be applied to the processing region specified by the processing region specifying section based on the original image input via the image input section, and an image editing section which replaces the image of the processing region in the original image input via the image input section by the patch image formed by the image forming section.