1. An image recognition device for executing an image recognition process, the image recognition device comprising: a processor; and a memory, wherein a program run by the processor executes the image recognition process, wherein the image recognition process includes: setting regions of interest in an image of an image plane; searching for a region including a recognition-targeted image; defining blocks each composed of pixels; and holding, in the memory, dictionary data including feature quantities respectively calculated from blocks forming a recognition-targeted region corresponding to the recognition-targeted region including the recognition-targeted image and composed of blocks, wherein, in the image recognition process, each region of interest is composed of a number of blocks which is the same as a number of blocks forming the recognition-targeted region, and wherein the processor calculates feature quantities for each block in the image plane, to be block-of-interest feature quantities, and wherein, for each region of interest, the processor: calculates, with respect to each block, scores for regions of interest including the block, based on the block-of-interest feature quantities and feature quantities, included in the dictionary, calculated from a block, a position of which in the recognition-targeted region corresponds to positions of the block in each region of interest; accumulatively adds the scores respectively for each region of interest; and temporarily holds each score accumulatively added for each region of interest as an evaluation value of each region of interest in the memory, wherein the processor then makes a determination about whether or not each region of interest includes the recognition-targeted image based on the evaluation value of the region of interest on which the accumulative addition has been finished on all of blocks forming the region of interest, wherein the feature quantities are vector data, and wherein the score is determined as inner products of the feature quantities calculated from a block corresponding to the block in the dictionary data and the block-of-interest feature quantities.