Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2007-04-09
2008-12-30
Nguyen, Lamson D (Department: 2861)
Incremental printing of symbolic information
Ink jet
Controller
C358S001200, C358S001900
Reexamination Certificate
active
07469985
ABSTRACT:
Beading caused by interferences between block patterns, which are driving patterns of two nozzle arrays at the time of printing with the use of the two nozzle arrays for the same color, and a mask is reduced. Specifically, when the mask is created, repulsive potentials are calculated between the mask and planes with the block patterns. That is, when a placement of a print permitting area in the mask is determined, the repulsive potentials are calculated between the mask and dots in the planes with the block patterns, and then the print permitting area is placed on the most dispersive position with the lowest energy. This allows the print permitting areas to be well dispersed in terms of the overlaps between the block patterns and the mask.
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T. Mitsa, et al., “Digital Halftoning Using A Blue Noise Mask”, SPIE 1452, 1991, pp. 47-56.
R. Dooley, “Predicting Brightness Appearance at Edges Using Linear and Non-Linear Visual Describing Functions”, Proc. SPSE Annual Meeting, p. 167 (1975).
Marumoto Yoshitomo
Noguchi Eri
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Nguyen Lamson D
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