Patent ID: 8384951

Claim:
An image generating device for generating an image including a gradation in which a color changes from a center of the gradation through multiple areas, comprising: an acquisition unit that acquires parameters representing a gradation pattern, the parameters specifying the center of the gradation and a shape of the gradation; a symmetry judgment unit that judges whether or not a gradation symmetry is satisfied, wherein the gradation symmetry is judged to be satisfied in the case where the shape of the gradation specified by the parameters has line symmetry or point symmetry and the center of the gradation is on a symmetry axis of the line symmetry or at the center of the point symmetry; an area determination unit that determines a partial area usable for generating a whole area of the gradation by use of the gradation symmetry, if the gradation symmetry is judged to be satisfied; a drawing unit that draws the gradation in the partial area based on the parameters acquired by the acquisition unit; and a gradation development unit that develops the gradation drawn in the partial area into the whole area of the gradation using the gradation symmetry by drawing the gradation drawn in the partial area repeatedly in the whole area.