B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
B41M 1/06 (2006.01) B41F 7/00 (2006.01) H04N 1/405 (2006.01)
Patent
CA 2086624
ABSTRACT OF THE DISCLOSURE ELECTRONIC HIGH-FIDELITY SCREENLESS CONVERSION SYSTEM AND METHOD USING A SEPARABLE FILTER A system for converting a continuous tone value to an output value having either a first level or a second level develops a first error based upon the application of a separable filter to an output value having a first level assumed for the continuous tone value undergoing conversion. A second error is developed based upon the application of the separable filter to an output value having a second level assumed for the continuous tone value undergoing conversion. If the first error is greater than the second error, the continuous tone value is converted to the output value having the second level. Otherwise, the continuous tone value is converted to the output value having the first level. The resulting error is diffused in a predetermined manner to neighboring continuous tone values yet to be converted.
Rodriguez Michael A.
Xie Zhenhua
Finlayson & Singlehurst
R. R. Donnelley & Sons Company
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