학술논문
Method of and an equipment for optical inspection of strip and sheet products
Document Type
Patent
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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.