Method for inspecting the length of a flexible thin object havin

Details Method for inspecting the length of a flexible thin object havin Method for inspecting the length of a flexible thin object havin

1992-11-24

1994-08-23

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250562, 348 61, G01N 2188

Patent

active

053409949

ABSTRACT:
A method for automatically inspecting a flexible thin object without having to touch the object. First, a digital image of a flexible thin object is input. Then the image is binarized. The binarized image is then thinned and labeled. The area of the labeled image is then calculated. The flexible thin object is judged to be free of defects when the calculated area is within a predetermined tolerance.

REFERENCES:
patent: 4539704 (1985-09-01), Pastor
patent: 4665441 (1987-05-01), Sakaue et al.
patent: 5115477 (1992-05-01), Groezinger

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