1. An image processing device comprising: a first image acquisition section that acquires a first image that includes an object image including information within a wavelength band of white light; a second image acquisition section that acquires a second image that includes an object image including information within a specific wavelength band; a type determination section that determines a type of the object image in the second image based on a feature quantity of pixels included in the second image; and a highlight section that performs a highlight process on the first image based on the type of the object image in the second image determined by the type determination section; wherein, when a plurality of object images are present in the second image as the object image: the type determination section determines one type among first to Nth (N is an integer equal to or larger than 2) types to which each of the plurality of object images in the second image belongs, and the highlight section changes a method of performing the highlight process among the determined types to which the plurality of object images in the second image belongs.