1. An image processing apparatus, comprising: an original image acquiring section that acquires an original image; a characteristic region judging section that makes a judgment as to whether a characteristic region is present in the original image captured by the original image acquiring section; an image adjusting section that, in a case where the characteristic region judging section makes a judgment that the characteristic region is present, adjusts an image of the characteristic region in the original image acquired by the original image acquiring section based on optical characteristics of an image capturing apparatus that captured the original image; and an image output section that, in a case where the characteristic region judging section makes a judgment that the characteristic region is present, outputs an image obtained through the adjustment by the image adjusting section and, in a case where the characteristic region judging section makes a judgment that the characteristic region is not present, outputs the original image acquired by the original image acquiring section.