Apparatus and associated method for representing elliptical half

Details Apparatus and associated method for representing elliptical half Apparatus and associated method for representing elliptical half

1992-10-05

1995-08-29

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358459, 358460, 395109, 395110, H04N 140

Patent

active

054465583

ABSTRACT:
An apparatus and method are implemented in a halftone printing system utilizing logic blocks that permit a halftone elliptical dot to be represented by an elliptical envelope that is formed from a combination of straight lines that are drawn from tangent points, on the outer periphery of the elliptical dot, through reference axis for the elliptical dot. The intersection points of the tangent lines on the reference axis define the size (density) of the elliptical dot. Storing the intersect points as sets of values for each size elliptical dot provides a unique representation set that is used to reconstruct a selected elliptical dot size for printing a halftone image.

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