Image analysis – Histogram processing – For setting a threshold
Patent
1986-04-09
1989-05-02
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
355 77, 358287, G06K 900
Patent
active
048275263
ABSTRACT:
It is necessary to photometrically measure density of an original film in order to determine its printing exposure value or correction value in photographic printing. It also is necessary to correctly recognize the size and the transporting direction of the original film. The method in accordance with the present invention enables the discrimination of the size and the transporting direction of the original film, and the processing of image signals to thereby achieve detection of images and the printing thereof at a high efficiency. An original film is illuminated and light from an aperture of a film carrier is received by an image sensor. Detected image information on a whole area of the aperture in segmented pixels are compared with corresponding stored information and the size and transportation direction of the original film is discriminated based on the comparison.
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Boudreau Leo H.
Couso Jose L.
Fuji Photo Film Co. , Ltd.
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