IMAGE PROCESSING DEVICE, IMAGE DISPLAY SYSTEM, AND IMAGE PROCESSING METHOD

An image processing device includes: an obtainer which obtains, from an imaging device provided in a vehicle so as to be oriented to capture an image of an area behind the vehicle, an image captured by the imaging device; a position detector which detects a face position of a driver; and an image processor which performs image processing to clip, according to the face position detected by the position detector, an image having a range corresponding to the face position, out of a combined image including the image, and superimpose a position image indicating a position in the vehicle, on the image at a position corresponding to the face position, and outputs an image resulting from the image processing.