Apparatus for generating a screened reproduction of an image

Details Apparatus for generating a screened reproduction of an image Apparatus for generating a screened reproduction of an image

H - Electricity

04

N

H04N 1/00 (2006.01) H04N 1/405 (2006.01)

Patent

CA 2042761

ABSTRACT A technique for generating a screened reproduction of an image is disclosed. The technique includes the steps of providing a representation of an original having input density values of the original, storing information representing a plurality of contours of desired dot configurations, corresponding to various possible density values for a multiplicity of screened dots, determining, for each coordinate pair of a plotter, whether the coordinate pair lies inside or outside of the contour of a dot corresponding to the input density value of the original and operating the plotter to write only if the coordinate pair lies inside the contour, thereby to produce the multiplicity of screen dots of sizes representing the input density values of the original. Apparatus employing the method is also provided.

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