System and method for halftoning using a time-variable...

Details System and method for halftoning using a time-variable... System and method for halftoning using a time-variable...

2007-03-06

2007-03-06

Lee, Thomas D. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003210

Reexamination Certificate

active

09344826

ABSTRACT:
The present invention overcomes the limitations of the prior art by providing a system and method for halftoning using time-variable halftone patterns. Successive frames that are presented to the output device are individually halftoned. The halftone pattern is changed from frame to frame. The different halftone patterns can be generated in real time, or they can be calculated prior to halftoning and stored in memory. Additionally, the halftone patterns can be generated using any conventional halftoning technique. The same halftoning technique can used to create each halftone pattern, or the halftoning techniques can be varied when creating halftone patterns. The halftoned frames are then viewed in a sequence in time. Because the halftone pattern is changing from frame to frame, the visibility of the pattern is reduced when compared with the patterns produced by prior art halftoning methods.

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patent: 5543941 (1996-08-01), Parker et al.
patent: 5708518 (1998-01-01), Parker et al.
patent: 6072451 (2000-06-01), Mano et al.
patent: 2002/0080098 (2002-06-01), Kim
patent: 08044313 (1996-02-01), None

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