Halftone dot encoding

Details Halftone dot encoding Halftone dot encoding

2005-12-20

2005-12-20

Rogers, Scott A. (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003260, C358S001200

Reexamination Certificate

active

06977758

ABSTRACT:
There is disclosed in embodiments methods for halftone dot encoding for engine-dependent-rendering. The methods first carefully design an asymmetric halftone dot for a specific printer and then utilizes a halftone dot encoding algorithm, which encodes the asymmetric halftone dot into a symmetric format. The asymmetric halftone dot design is satisfies the requirements of raster output scanner electronics, as well as several engine dependent constraints. These include: rotation insensitivity, minimum dot size, minimum hole size, minimum appendage, and minimum cavity. The symmetric dot encoding allows perfect reconstruction of the binaries that may have been generated using the original asymmetric dot. This reconstruction is achieved using imbedded binary resolution conversion. In this way, this resolution conversion is acting as a decoder.

REFERENCES:
patent: 6175653 (2001-01-01), de Queiroz
patent: 6650793 (2003-11-01), Lund et al.
patent: 6804417 (2004-10-01), Lund et al.
U.S. Appl. No. 10/354,385, filed Jan. 30, 2003, Lieberman et al.

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