Printer pixel size and toner/ink consumption reduction system

Details Printer pixel size and toner/ink consumption reduction system Printer pixel size and toner/ink consumption reduction system

1996-09-27

1999-08-31

Coles, Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

395102, 358515, 358516, H04N 146, G06F 1500

Patent

active

059464500

ABSTRACT:
A system for reducing toner or ink consumption in rendering images, in which a transfer function is used to modify screening of the image to be rendered. Rendering systems including the use of single or multiple colors can employ the present invention. An algorithm is used in the present system to read in an arbitrary halftone dot and for each pixel in the halftone cell the output is a replicate of the threshold, Ta or Tb, surrounded by three pixels of white thresholds, a smooth transition from white to the now reduced maximum area coverage (such as 25%), while creating or maintaining the appearance of image uniformity at this reduced maximum area coverage.

REFERENCES:
patent: 4521805 (1985-06-01), Ayata et al.
patent: 4553172 (1985-11-01), Yamada et al.

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