Printing method with camouflage of defective print elements

Details Printing method with camouflage of defective print elements Printing method with camouflage of defective print elements

2011-03-08

2011-03-08

Zimmerman, Mark K (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003060, C358S502000, C347S008000, C347S009000, C347S020000, C347S037000, C347S047000

Reexamination Certificate

active

07903290

ABSTRACT:
A printing method is provided for a printer having a printhead with a plurality of print elements and capable of printing a binary pixel image. The method includes locating defective print elements, determining a camouflage area in the vicinity of pixels that would have to be printed with the defective print elements, and camouflaging the defective print elements by modifying image information in the camouflage area, wherein the camouflaging step is incorporated in a halftoning step in which error diffusion is used for creating the binary pixel image, and comprises a step of modifying an error propagation scheme for the camouflage area.

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