Method for testing elastic properties of a dressing on a printin

Details Method for testing elastic properties of a dressing on a printin Method for testing elastic properties of a dressing on a printin

1995-04-13

1998-02-24

Bost, Dwayne

Image analysis

Applications

Document or print quality inspection

364552, G06K 900

Patent

active

057217890

ABSTRACT:
The object of the invention is attained in a manner where is at least one image pickup device is provided for picking up image signals obtained from at least one surface of a printed image, and a steering and control device connected to the pickup device in which the image sequences are stored. Furthermore, the image signals are examined for presence of jumps or transitions in tone values, and the position coordinates of the transitions in tone value jumps are stored. In a further step the frequency of those tone value jumps, in direction of the coordinates, which exceeds a given threshold value, are recorded, and applied to develop a signal for indicating need to replace the dressing.

REFERENCES:
patent: 5144566 (1992-09-01), Anderson
patent: 5625703 (1997-04-01), Okuda
Treffpunkt Druckindustrie Publ. Nov. 1994, p. 52, "Automatic Error Detection System".

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