Method of and an equipment for optical inspection of strip and s

Details Method of and an equipment for optical inspection of strip and s Method of and an equipment for optical inspection of strip and s

1991-05-28

1993-11-16

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

382 53, 382 41, 358106, G06K 900, H04N 718

Patent

active

052630943

ABSTRACT:
A method of and an equipment for optical inspection of strip and sheet products for the detection of surface defects, which equipment comprises an image forming apparatus 1, 2 for producing images of successive parts of the surface of a product 3 and for converting the images to analog signals 4, an A/D converter 5 for converting the analog signal to a digital signal 6, and an image analyzing unit 7 for analyzing the digital signal to detect surface defects therefrom. To reduce the data processing capacity required of the image analyzing unit, the equipment further comprises a compression unit 8 arranged between the A/D converter and the image analyzing unit for compressing the digital signal before it is analyzed.

REFERENCES:
patent: 4665317 (1987-05-01), Ferriere et al.
patent: 4751572 (1988-06-01), Baumbaugh et al.
patent: 4908871 (1990-03-01), Hara et al.

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