1 April 1988 Optical Hough And Fourier Processors For Product Inspection
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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.
David P. Casasent, David P. Casasent, Jeffrey Richards, Jeffrey Richards, } "Optical Hough And Fourier Processors For Product Inspection," Optical Engineering 27(4), 274258 (1 April 1988). https://doi.org/10.1117/12.7976668 . Submission:

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