1. An image processing apparatus comprising: a separating unit that separates an image, which includes a plurality of types of partial image, into types of partial image other than a predetermined specific type that is designated as likely to be erroneously separated; a setting unit that makes a setting designating whether or not a predetermined two types of partial image of the partial images separated by the separating unit are to be easily determined to be partial images of the predetermined specific type; and a determining unit that determines whether or not at least one of the predetermined two types of partial image is a partial image of the predetermined specific type based on the setting made by the setting unit.