Method of camouflaging defective print elements in a printer

Details Method of camouflaging defective print elements in a printer Method of camouflaging defective print elements in a printer

2004-11-04

2009-12-29

Lee, Thomas D (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001180, C358S003010, C348S246000

Reexamination Certificate

active

07639402

ABSTRACT:
A printer, a computer program and a method are provided for camouflaging defective print elements in the printer having a printhead with a plurality of print elements. The method includes (a) representing the image information to be printed by a multi-level pixel matrix wherein a grey level of each pixel is indicated by a number, (b) transferring the grey levels of pixels that are assigned to a defective print element, to neighboring pixels in the pixel matrix, and (c) converting the pixel matrix having the transferred grey levels, into a bitmap to be printed.

REFERENCES:
patent: 6215557 (2001-04-01), Owens
patent: 6217148 (2001-04-01), Adler et al.
patent: 6428139 (2002-08-01), Silverbrook
patent: 6575549 (2003-06-01), Silverbrook
patent: 6863361 (2005-03-01), Barr et al.
patent: 0 999 516 (2000-05-01), None
patent: 1060896 (2000-12-01), None
patent: 1 314 561 (2003-05-01), None

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