An image recognition device for generating an output rotation image from input original image data, including a memory section being capable of storing data of a line including pixels of the original image data to be processed, an angle-to-sine/cosine converting section obtaining an X component and a Y component where a pixel interval of the original image data is an oblique side based on a rotating angle, and a coordinate searching section calculating a reference coordinate of the output rotation image for the original image using the X component and the Y component in order of input of the original image data and outputting data of the output rotation image based upon the reference coordinate.