1. An image processing method to process a moving image, which is shot by a predetermined video shooting device, in increments of access units, wherein the imaging blur is represented by a corresponding low-pass filter showing the properties of imaging blur which occurs at the time that said moving image is shot with said video shooting device, comprising the steps of generating an inverse filter having inverse properties as to said low-pass filter, and performing processing to apply said inverse filter to said access unit to be processed, wherein said step of generating an inverse filter includes an iterative algorithm in the frequency domain based on the original blurred image and the point spread function.