Method and apparatus for eliminating unwanted steps at edges in graphic representations in the line raster
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United States of America Patent
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Jan 3, 2006
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app pub date -
Aug 30, 1999
filing date -
Aug 30, 1998
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Abstract
A method of eliminating unwanted steps at edges in image or graphic representations in the line raster, in particular in on-line operation having the steps: a) Application of an edge operator to an image portion for coarsely ascertaining at least one rastered edge configuration, b) Determining the position of at least a first pixel from the amount of those pixels which form the rastered edge configuration or adjoin said rastered edge configuration, c) Approximation of a straight line for ascertaining a probable configuration of the unrastered image edge in the proximity of the first pixel, d) Ascertaining a criterion from the approximation straight line and the position of the first pixel for mixing a color X to the color C in the first pixel considered, and e) Mixing the ascertained color X to the color C in the first pixel considered.
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