Apparatus & method for descreening

Details Apparatus & method for descreening Apparatus & method for descreening

1991-08-27

1994-07-26

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358443, 358455, 358457, 358536, 358534, 358528, 382 54, 382 47, H04N 140

Patent

active

053330641

ABSTRACT:
Apparatus and method for descreening and for performing resolution changes on a half-tone image in order to produce a continuous tone image. The apparatus includes filter apparatus for removing screen information from the half-tone image including a plurality of different filters each providing interpolation and screen removal functions and a controller for selecting per pixel of the continuous tone image and as a function of desired resolution changes, one of the filters for operation on a neighborhood of the pixel.

REFERENCES:
patent: 4288821 (1981-09-01), Lavallee et al.
patent: 4554594 (1985-11-01), Ciardiello et al.
patent: 4680720 (1987-07-01), Yoshii et al.
patent: 4907096 (1990-03-01), Stansfield et al.
patent: 5027078 (1991-06-01), Fan
patent: 5131059 (1992-07-01), Kobayashi et al.

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