1. An image processor comprising: at least one processor configured to execute: an image group generating unit that generates, from an original image, a group of images including at least one smoothed image which is the original image smoothed with at least one smoothing degree; an illumination image generating unit that generates an illumination image in which an illumination component of the original image is set to be a pixel value by use of at least one of the images included in the group of images; a smoothed image acquiring unit that acquires a particular smoothed image which is the original image smoothed with a smoothing degree for suppressing an occurrence of image distortion, based on the at least one smoothed image; a reflection rate image generating unit that generates a reflection rate image in which a reflection rate component of the original image is set to be a pixel value, using a ratio of a synthesis of the original image, the particular smoothed image and a synthesizing degree information, which represents a synthesizing degree of the original image and the particular smoothed image, to the illumination image; and a reproduction image generating unit that generates a reproduction image which is reproduced so that visibility of the original image is enhanced, based on at least the reflection rate image and an enhancing degree information which represents an enhancing degree of the reflection rate component of the original image.