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Proceedings Paper

An Electro-Optical System For Inspection Of Glass Bottles Using Adaptive Spatial Filtering
Author(s): K. M. Johnson; R. Cormack; W. T. Cathey; F. Dolder
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Paper Abstract

Defects in glassware known as "stuck glass" are caused by flying glass particles falling into red hot bottles during their manufacture. We describe the design, construction, and results of a prototype electro-optical inspection machine which detects sub-millimeter defects in glass bottles. This system uses pattern processing and spatial filtering in the Fourier domain to optically subtract the signature of the nondefec-tive part of the bottle, from the total image of the bottle. The huge variation in acceptable glass bottles, even within a particular sized bottle, requires a unique spatial filter for each bottle being inspected. We use a two-dimensional spatial light modulator to create such an adaptive spatial filter which allows us to compensate for these variations in real-time.

Paper Details

Date Published: 21 August 1987
PDF: 7 pages
Proc. SPIE 0754, Optical and Digital Pattern Recognition, (21 August 1987); doi: 10.1117/12.939976
Show Author Affiliations
K. M. Johnson, University of Colorado (United States)
R. Cormack, University of Colorado (United States)
W. T. Cathey, University of Colorado (United States)
F. Dolder, Ball Electronic Systems Division (United States)

Published in SPIE Proceedings Vol. 0754:
Optical and Digital Pattern Recognition
Hua-Kuang Liu; Paul S. Schenker, Editor(s)

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