Graphic information carried by hue contrast is actualized, mathematical description specificity of hue as the basic colour characteristic is investigated, theoretical bases of hue contrast control are stated, original algorithm and program for images hue contrast control are described, resolution of the offered method is experimentally estimated, scope of the created software product possible applications is outlined, efficiency of its application in expert problems is shown.

Keywords: graphic information, hue contrast, contrast control, algorithm and program realization, latent images