Cutoff control system

Details Cutoff control system Cutoff control system

1985-03-29

1988-04-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

250571, 382 34, 382 42, G06M 900

Patent

active

047364467

ABSTRACT:
A system for controlling an apparatus operating on a moving web, in accordance with a periodic characteristic of the web. Indicia of successive periods of the characteristics are generated and compared to generate control signals to the apparatus. Specifically, a cutoff control system for a web-fed printing press is disclosed wherein the effective position of the cutting apparatus along the web path is varied in accordance with variation in the position of a maximum density change in an individual repetitive image from that of a reference image, or in accordance with a cross-correlation between the individual image and a reference image.

REFERENCES:
patent: 3872434 (1975-03-01), DuVall et al.
patent: 3922539 (1975-11-01), Carnes et al.
patent: 4243925 (1981-01-01), Gnuechtel
patent: 4449240 (1984-05-01), Yoshida
patent: 4561103 (1985-12-01), Horiguchi et al.

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