Image recognition device and image recognition program

A non-transitory computer readable medium storing an image recognition program thereon which causes a computer to realize functions comprising:

• an image acquiring function to acquire an image;
• a reference line setting function to set a reference line, which corresponds to a distance to a subject and is at least partially placed in an outer region of the acquired image, in a horizontal direction to the acquired image;
• a detection window setting function to detect a detection window having a size corresponding to a position of the reference line along the reference line;
• a window image acquiring function to acquire a window image of a region included in the detection window;
• a reference feature data acquiring function to acquire reference feature data representing features of a recognition target;
• a determining function to perform a determination of whether the recognition target is included in the acquired window image by using the acquired reference feature data;
• and
• an outputting function to output a determination result provided by the determination.