1. An image processing device that processes an image, comprising: an image input portion inputting a target image that is an image to be processed; a motion vector acquisition portion acquiring a motion vector generated by relative movement with respect to a subject drawn in the target image when an imaging device generates the target image; and a distortion component estimation portion estimating a rolling shutter distortion component associating a coordinate system of the target image without distortion with a coordinate system of the target image with distortion based on a parallel movement component the motion vector and a distortion coefficient.