1. A multi view image processing apparatus comprising: at least one processor which executes: a depth extractor which is configured to extract depth information of a three-dimensional (3D) image; a depth corrector which is configured to correct a depth value of an on screen display (OSD) region in the 3D image based on the extracted depth information and OSD mask information which corresponds to the OSD region in the 3D image; a rendering device which is configured to render multi view images using the 3D image with the corrected depth value; and a controller which is configured to control the depth corrector to correct a depth of at least one OSD region selected according to a user command differently from a depth of a remaining OSD region of a plurality of OSD regions in the 3D image.