An image processor includes: an image group generating unit that generates, from an original image, a group of images including at least one smoothed image; an illumination image generating unit that generates an illumination image 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 based on the at least one smoothed image; a reflection rate image generating unit that generates a reflection rate image based on the original image, the particular smoothed image, a synthesizing degree information which represents a synthesizing degree of the original image and the particular smoothed image, and 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.