Black white image scaling having print density control and...

Details Black white image scaling having print density control and... Black white image scaling having print density control and...

2005-04-15

2010-11-09

Coles, Edward L (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001200, C358S001900, C358S003100, C382S162000, C382S166000, C382S232000, C382S233000, C382S298000, C382S299000, C345S698000

Reexamination Certificate

active

07830552

ABSTRACT:
A scaling system and method for scaling a bitonal image that has print density control. A system for scaling a bitonal image is provide that includes: a polarity detection system for detecting a polarity of the bitonal image; a pixel reduction system that generates a scaled image by reducing pixel pairs down to single scaled pixels by selectively applying either a normal or reverse set of pixel reduction rules, wherein an applied set of pixel reduction rules is determined based on a detected polarity; and a line density control system that allows the scaled image to be made lighter or darker by changing the applied set of pixel reduction rules.

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