A synthesized image seen looking down from above the vehicle is compiled by connecting the multiple of overhead images, whereby an existence of a three-dimensional object in the vehicle periphery is determined, a correction value is calculated so as to reduce a difference in luminance and coloring in a luminance and coloring correction reference region in which neighboring overhead images overlap, luminance and coloring correction is carried out using the correction value when an amount of change in the luminance and coloring information formed of the correction is less than a predetermined value, and the images wherein luminance and coloring has been corrected are synthesized by connecting into one image, whereby a beautiful display image with a continuous, smooth joint can be obtained.