Method for detecting blemishes contiguous to the perimeter of a

Details Method for detecting blemishes contiguous to the perimeter of a Method for detecting blemishes contiguous to the perimeter of a

1984-10-22

1986-11-25

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 718

Patent

active

046252371

ABSTRACT:
Blemishes in the proximity of the perimeter of an image on a charge coupled device (CCD) are detected. The image pixels adjacent to the perimeter are sequentially detected and three consecutive pixels define a motion as either straight, clockwise or counterclockwise. The detection occurs in a clockwise direction and straight or clockwise motions are permitted. When two counterclockwise motions are detected, and a clockwise motion has not occurred between them, a blemish signal is provided.

REFERENCES:
patent: 4454541 (1984-06-01), Duschl
patent: 4454545 (1984-06-01), Duschl

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