Image processing apparatus for providing an isolated-dot removin

Details Image processing apparatus for providing an isolated-dot removin Image processing apparatus for providing an isolated-dot removin

1996-11-08

1998-06-09

Rogers, Scott

Image analysis

Image enhancement or restoration

Image filter

382275, 358462, 358468, G06K 940, H04N 1409

Patent

active

057648123

ABSTRACT:
An image processing apparatus includes a plurality of detecting units each of which detects whether binary signals derived from picture elements of image data match with one of a plurality of patterns of isolated dots, the detecting units generating a plurality of detection signals which are set based on respective results of the detections with respect to the isolated-dot patterns, wherein the isolated-dot patterns are different from each other in the number of isolated dots included in each pattern, the isolated-dot patterns having respective sizes predetermined for isolated-dot removing function levels. A selecting unit selects one of the isolated-dot removing function levels in response to an operation control signal, the selecting unit generating an isolated-dot signal which is set for each picture element based on the detection signals by the selected isolated-dot removing function level. An operation control part inputs the operation control signal to the selecting unit in accordance with a setting by an operator with respect to one of the isolated-dot removing function levels.

REFERENCES:
patent: 4760464 (1988-07-01), Sakano
patent: 4984283 (1991-01-01), Sakano
patent: 5144456 (1992-09-01), Sakano
patent: 5245445 (1993-09-01), Fujisawa

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