1. An image processing apparatus comprising: a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to: detect motion based on a first block image within a first frame image included in first reduced image data sampled at a first sampling point and a first reference block image within a first reference frame image included in the first reduced image data; and extract a second block image when detecting that the first block image and the first reference block image are not moving and generate first image data corresponding to the first block image based on the first block image and the second block image, wherein the second block image is in a second frame image included in second reduced image data sampled at a second sampling point that is different from the first sampling point and is at substantially the same time as the time of the first block image or the first reference block image.