1. An image processing apparatus, comprising: a detecting unit normalizing color information of a fundamental region to be a target, among plural fundamental regions set to an image, by using color information of a vicinity of the fundamental region to be the target or color information of an entire image and detecting the fundamental region to be the target as an appropriate region when a luminance value of the fundamental region to be the target after normalization is equal to or lower than a preset threshold; a specifying unit specifying adjacent states of fundamental regions excluding the appropriate region among the plural fundamental regions; and a region segmentation unit performing region segmentation on each component included in the image based on the adjacent states of the fundamental regions excluding the appropriate region specified by the specifying unit.