Halftone image estimation methods for dither images

Details Halftone image estimation methods for dither images Halftone image estimation methods for dither images

1986-11-10

1989-02-07

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

382 56, H04N 140

Patent

active

048035580

ABSTRACT:
The present invention relates to a method of estimating a halftone image in which a plurality of scanning unit areas including, at least, a unit area of (1 pixel.times.1 pixel) are set in a binary image consisting of white and black regions; a binary image obtained from estimated values based on a ratio between white and black regions within the scanning unit area; an estimated value of an optimum scanning unit area is obtained per every pixel of the halftone image is produced based on the estimated value; and further the estimated halftone image is reconverted to a binary image after processing of enlarging or reducing.

REFERENCES:
patent: 4349846 (1982-09-01), Sekigawa

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