Hidden surface elimination in raster graphics using visigrams

Abstract

In any form of display where three-dimensional images are required to be projected onto a two-dimensional display the hidden surface or hidden line removal certainly helps to enhance the realism of the final image. This paper describes some of the existing techniques used to eliminate surfaces and also discussed the method of using "visigrams", a new technique that has the advantage of using less memory at the expense of a little more processing. The method is similar to that used in photogrammetry whereby three-dimensional information may be stored in two or more two-dimensional projections of the three-dimensional object.