Halftone correction system
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United States of America Patent
Stats
-
Nov 21, 1995
Grant Date -
N/A
app pub date -
Apr 8, 1994
filing date -
Apr 8, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Prior to printing on a digital printer a halftone reproduction of a continuous one original image, digital image signals are corrected for the effects of printed dot overlap generated by a particular chosen digital printer. The dot overlap correction is based upon superimposing a virtual screen on the printer-generated dot patterns such that the printer dots are centered at the orthogonal intersections of the lines defining openings in the screen. This centering approach allows for determination of printed dot overlap by a 2.times.2 matrix, so that only seven test patterns are required for characterization of the printer and for dot overlap correction of halftone prints produced by the printer.
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