Autotypical screening with optimised dotshape

Details Autotypical screening with optimised dotshape Autotypical screening with optimised dotshape

1996-11-12

1999-03-16

Rogers, Scott

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358459, 358298, 347131, H04N 1405, H04N 123, G06K 1502

Patent

active

058840133

ABSTRACT:
A method for generating a screened reproduction of a multiple tone image comprises the steps of autotypical or amplitude modulation screening the multiple tone image to obtain screened data representing tones of the multiple tone image in terms of halftone dots; reproducing the halftone dots on an imaging element by means of a scan-wise exposure by means of a laser or a LED, wherein in extreme regions of the tone scale the shape of the halftone dots is compact, characterized in that the halftone dots have a ratio of peripheral length to surface area which is minimal.

REFERENCES:
patent: 3742129 (1973-06-01), Roberts et al.
patent: 3922484 (1975-11-01), Keller
patent: 5155598 (1992-10-01), Ramekers et al.

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