Container inner surface tester employing a television camera and

Details Container inner surface tester employing a television camera and Container inner surface tester employing a television camera and

1994-02-14

1995-09-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

348127, G01N 904, G06M 700, H01J 4014

Patent

active

054536120

ABSTRACT:
The container inner surface tester extracts image information about the opening portion and the deformation of the inner surface of a test cylindrical container through an image recognizing technique, and checks the circularity of the opening portion of the container. If it is detected that the present cylindrical container indicates a major defect level higher than a minor defect level according to the check of the image inside the container, then the production line of containers is immediately stopped to minimize the occurrences of major defective containers. Furthermore, the cylindrical container inner surface tester identifies the adjacent point of cylindrical containers through calculations and logical operations according to the image information. Likewise, the cylindrical container inner surface tester extracts a test area of an opening portion of an image of a test cylindrical container according to calculations and logical operations, and performs various processes such as determining the acceptability of the extracted white or black level of an image. Furthermore, the cylindrical container inner surface tester converts image signal to a binary value using a binary threshold for use in detecting a picture element indicating a major defect more white or black, or a larger difference in intensity than a background picture element, compares the number of picture elements indicating a major defect for each window area with an area threshold for use in determining a major defect, and determines whether or not the present container has a major defect.

REFERENCES:
patent: 4086497 (1978-04-01), Murray
patent: 4175236 (1979-11-01), Juvinall
patent: 4428674 (1984-01-01), Giebel et al.
patent: 4682220 (1987-07-01), Beurskens
patent: 4701612 (1987-10-01), Sturgill
patent: 4735508 (1988-04-01), Bellio
patent: 4775899 (1988-10-01), Yoshida
patent: 4943713 (1990-07-01), Yoshida
patent: 5233199 (1993-08-01), Toyama
patent: 5338000 (1994-08-01), Toyama
patent: 5349435 (1994-09-01), Hall et al.

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