1. An image recognizing apparatus comprising: a dictionary memory configured to store first dictionary data and second dictionary data different from the first dictionary data; a block determining module configured to determine that a target block comprising a target pixel to be processed of a plurality of pixels in image data is a shared block to which the second dictionary data is used, a mirror block to which the second dictionary data is used, or an unshared block to which the first dictionary data is used, based on a position of the target block; and a recognizing module configured to use the first dictionary data for the unshared block and the second dictionary data for the shared block and the mirror block, and recognize characteristic portion of the image expressed by the image data.