Ink relocation for color halftones

Details Ink relocation for color halftones Ink relocation for color halftones

1997-07-31

1999-11-23

Lee, Thomas D.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358534, 358518, 382275, H04N 146

Patent

active

059915129

ABSTRACT:
Current methodologies for color image halftoning produce prominent halftoning noise. Brightness variations between color dots placed at neighboring locations are a primary cause of color halftone noise. To correct this flaw, an Ink Relocation Postprocess to halftoning algorithms relocates ink drops between neighboring drop locations in order to reduce local brightness variations. Due to the intrinsic blurring side-effect of ink relocation, some enhancement may be desired. Two application-specific enhancement procedures are presented. In the first enhancement, ink relocation is suppressed in areas of fine detail. In the second enhancement, edge sharpening is performed after ink relocation.

REFERENCES:
patent: 5768440 (1998-06-01), Campanelli et al.

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