Apparatus and method for random screening
AssigneeScitex Corporation Ltd.
InventorEphraim A. Carlebach
Life of this patent
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Abstract
Apparatus and a method for random screening including an exposure select operator which receives two-dimensional coordinate information relating to a screen and input density information relating to an image to be screened, the operator being characterized in that for a constant input density it provides a constant exposure output over each of a multiplicity of groups of contiguous coordinate regions, at least some of which groups are mutually non-aligned.
Claims6
Apparatus for random screening comprising an exposure select operator which receives two-dimensional coordinate information relating to a screen and input density information relating to an image to be screened, the operator being characterized in that it provides, for a given input density, a multiplicity of minimum size clusters of contiguous regions which are either all exposed or all not exposed, arranged generally along exposure lines and in columns perpendicular thereto, the edges of adjacent ones of clusters which lie generally along the same exposure line or column not all being precisely mutually aligned therealong.
A method for random screening comprising an exposure select operation which receives two-dimensional coordinate information relating to a screen and input density information relating to an image to be screened, the operation being characterized in that it provides, for a given input density, a multiplicity of minimum size clusters of contiguous regions which are either all exposed or all not exposed, arranged generally along exposure lines and in columns perpendicular thereto, the edges of adjacent ones of clusters which lie generally along the same exposure line or column not all being precisely mutually aligned therealong.
Dependencies are inferred from the claim text.