Apparatus and method for image reproduction by random selector o

Details Apparatus and method for image reproduction by random selector o Apparatus and method for image reproduction by random selector o

1989-11-09

1991-03-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358428, H04N 140

Patent

active

050015753

ABSTRACT:
An apparatus for reproducing an image with a desired magnification other than that expressed in an integer comprises a key switch for inputting the desired magnification. When reproducing the image with the selected magnification, it is necessary to interpolate pixel dots by increasing or decreasing the number of pixel dots for each predetermined region. The pixel dots are output in accordance with interpolation tables.
The image reproducing apparatus further comprises an interpolation table preparing device for preparing a plurality of interpolation tables having different positions for interpolating the pixel dots in each predetermined region in accordance with the desired magnification, and a switching device for switching among the plurality of interpolation tables at random for each scan line. Since the plurality of interpolation tables are switched for each scan line, no regular patterns appear on the reproduced images.

REFERENCES:
patent: 4163605 (1989-08-01), Yamada
patent: 4381547 (1983-04-01), Ejiri
patent: 4712141 (1987-12-01), Tomohisa
patent: 4827433 (1989-05-01), Kamon
patent: 4833531 (1989-05-01), Abe et al.
patent: 4920571 (1990-04-01), Abe et al.

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