The present invention provides a fast method of super-resolution processing which realizes speedup of the high-speed super-resolution processing by speeding up the calculations of an evaluation function and the differential of the evaluation function with respect to a high-resolution image in a reconstruction-based super-resolution processing. A fast method of super-resolution processing for speeding up a super-resolution processing that estimates a high-resolution image from multiple low-resolution images with displacements, the method characterized in that an evaluation function and a differential of the evaluation function with respect to the high-resolution image are calculated by a combination of basic image operations.