The application of computer graphics to problem solving has increased over the past few years. The representation of data in the form of line drawings, graphics, charts, diagrams and line plots has been explored extensively. This paper addresses itself to some new techniques used to solve problems associated with extending the power of computer graphics to include black and white, and color shading. In particular it presents a new method for converting data describing three-dimensional objects into data that can be used to generate two-dimensional halftone images. It deals with some problems that arise in black and white, and color shading.

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