The present invention processes captured images from a camera mounted on to a moving device or a user, so as to make the images compatible with display on an image display device fixed to the head or face of the user. A drawing unit 1042 first corrects (F1421) a head attitude angle qh of the user by using a camera attitude angle qc, then cuts out, from the captured image, the display angle of view corresponding to the corrected head attitude angle qh* of the user, and renders (F1422) a free-viewpoint image. An image processing device 1040 sends the free-viewpoint image rendered by the drawing unit 1042, to the display device 1020 via a communications unit 1041 and same is displayed (F1430) by the display device 1020.