An image processing device for recognizing an object corresponding to a registered image registered beforehand from an imaged image, comprising: an obtaining unit configured to obtain the imaged image; a recognizing unit configured to recognize an object corresponding to the registered image from the imaged image; and a detecting unit configured to detect, based on a registered image corresponding to an object recognized from the imaged image thereof, an area where another object is overlapped with the object corresponding to the registered image thereof.