Half tone image enhancement for printers
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United States of America Patent
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-
Feb 6, 2001
Grant Date -
N/A
app pub date -
Apr 30, 1998
filing date -
Apr 30, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus for halftoning over a region of output pixels by defining large, or macro, halftone cells corresponding to regions of contiguous pixels and partitioning the macro halftone cells into smaller halftone cells. The gray, or hue, level within a macro halftone cell is determined by the number of pixels which are darkened within the macro halftone cell. Selection of the number of pixels to be darkened in response to input data can be effected in a manner to achieve automatic gamma correction.
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