1. An image processing apparatus, comprising: a processor to control one or more processor-executable units; an extraction unit to extract an occlusion region of a color image of a reference view using a difference between a warped color image of the reference view corresponding to a target view and a color image of the target view; a backward warping unit to backward warp the occlusion region of the color image of the reference view to correspond to the reference view; and a processing unit to generate an occlusion region image to be stored by applying a side offset to the backward warped occlusion region of the color image of the reference view.