Apparatus for enlarging or reducing an image pattern

Details Apparatus for enlarging or reducing an image pattern Apparatus for enlarging or reducing an image pattern

1989-05-19

1990-02-20

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358451, 382 63, G06K 942

Patent

active

049033158

ABSTRACT:
Disclosed is an apparatus for enlarging or reducing an image pattern, wherein the image pattern and a pair of parallel image sensors are moved relative to each other to read the image pattern, the size of the image pattern along the moving direction is calculated on the basis of an output from one image sensor, a read clock frequency of the other image sensor is controlled on the calculated size of the image pattern, and thus enlargement or reduction of the image pattern along the moving direction can be easily performed.

REFERENCES:
patent: 3179922 (1965-04-01), Rabinow
patent: 3189873 (1965-06-01), Rabinow
patent: 3432673 (1969-03-01), Mader
patent: 3462737 (1969-08-01), Malaby
patent: 4672681 (1987-06-01), Goldkuhle
patent: 4750048 (1988-06-01), Satoh et al.

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