Image processing apparatus for smoothing edges of image

Details Image processing apparatus for smoothing edges of image Image processing apparatus for smoothing edges of image

1992-11-24

1994-07-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3582611, 3582612, 3582613, 358430, 358445, 382 30, 382 54, H04N 1417, H04N 140

Patent

active

053272609

ABSTRACT:
An image processing system for smoothing edges of an image, includes a sampling part for sampling a group of dots from an image having a plurality of input black and white dots, the group of dots having a target dot at the center of a region and being sampled for each dot of the image, a recognition part for recognizing a dot pattern from the sampled dots, the dot pattern described by successive black dots and located at a boundary between a black dot region and a white dot region, and for producing code signals from the result of the recognition to define features of the dot pattern for each target dot, a discrimination part for detecting whether or not each target dot is part of an inclined line having a gradient relative to horizontal or vertical direction in response to the code signals, thus determining whether or not each target dot is to be corrected, a correction part with a memory, for inputting the code signals to the memory as address inputs when the dot is to be corrected, and for outputting a corresponding correction dot data from the memory in accordance with the code signals, and an output part for outputting an image with corrected dots which are in accordance with the correction dot data of the correction part.

REFERENCES:
patent: 4544922 (1985-10-01), Watanabe et al.
patent: 4618846 (1986-10-01), Ross et al.
patent: 4878124 (1989-10-01), Tsujimoto et al.
patent: 5058187 (1991-10-01), Kim
patent: 5077812 (1991-12-01), Kanno et al.
patent: 5091976 (1992-02-01), Murayama
patent: 5093870 (1992-03-01), Watanabe
patent: 5093872 (1992-03-01), Tutt

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