@kinski1810

The automated inspection of lace using machine vision

, , and . Mechatronics, 5 (2–3): 215 - 231 (1995)Mechatronics in Textfile Industries.
DOI: http://dx.doi.org/10.1016/0957-4158(95)00012-T

Abstract

Lace is particularly difficult to inspect using machine vision since it comprises a fine and complex pattern of threads which must be verified, on line and in real time. This paper describes instrumentation for inspecting lace actually on the knitting machine. A \CCD\ linescan camera, synchronised to machine motions, grabs an image of the lace. Differences between this lace image and a perfect prototype image are detected by comparison methods, thresholding techniques, and finally, a neural network (to distinguish real defects from false alarms). Though produced originally in a laboratory on \SUN\ Sparc work-stations, the processing has subsequently been implemented on a 50 \MHz\ 486 \PC\ look-alike. Successful operation has been demonstrated in a factory, but over a restricted width. Full width coverage awaits provision of faster processing.

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