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Optical Engineering

Optical Hough And Fourier Processors For Product Inspection
Author(s): David P. Casasent; Jeffrey Richards
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Paper Abstract

Coherent optical processors for product inspection are discussed, and data from a case study are presented. An optical processor that produces both Fourier and Hough transform data is presented. The Fourier transform data are wedge/ring sampled to produce in-plane distortion-invariant features to determine the product's attribute (good or defective) and its orientation. Hough transform data are used for new quantitative mensuration information on good products. In one case, optical Hough transforms are quantitatively shown to yield more consistent results than do digital realizations.

Paper Details

Date Published: 1 April 1988
PDF: 8 pages
Opt. Eng. 27(4) 274258 doi: 10.1117/12.7976668
Published in: Optical Engineering Volume 27, Issue 4
Show Author Affiliations
David P. Casasent, Carnegie Mellon University (United States)
Jeffrey Richards, Carnegie Mellon University (United States)

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