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Show 25 The simultaneous constrast illusion is but world" as it is not as critical to the a phenomenon in common technique of the real computer-generated pictures the Mach Band effect. Mach established the following principle: "Wherever the light-intensity surface (the light intensity curve of- illuminated an of which varies in only direction) has a concave or convex flection with respect to the axis of the abscissa, that particular Iace appears brighter or darker, respectively, than Its surroundings." (E. Mach, 1865); one Whenever the slope of the light The appears. magnitude set of of the curvature The of curved like planar facets, the of this derived surface the edges. By from this displayed facets of facets does is same attempt an increasing interpolate the could is shrunk to not shade Band principle number the be a expected, The of restored. resolution problem. between vertices, a the technique shading model objects made of curved surface. appearance of smooth a apparent brightnesses along polygons, it was hoped that a better obtained, and the smoothness of Unfortunately, unless the point, the If because the eye enhances the undesired could be the solve to central are to restore the was The present. patterns. shade is suited to display polygon edges, creating surface visible, depending upon the approximated by planar facets. approximation of the curved surfaces approximated less cubes, etc., but fails to approximate technique over or 2.3, illustrate different Mach surface, the result is contrary to what discontinuities more effect this changes, curve but the effect itself is always change, each facet with the displays goal and conclusions ,displaying which of this effect is degree Figures 2.2, intensity multiplication of the size of the the number Using the Gouraud method to linearly the discontinuities of the shading |
