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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 2, Iss. 11 — Nov. 1, 1985
  • pp: 1857–1862

Automated digital visual inspection with dark-field microscopy

Jorge L. C. Sanz, Fritz Merkle, and Kwan Y. Wong  »View Author Affiliations


JOSA A, Vol. 2, Issue 11, pp. 1857-1862 (1985)
http://dx.doi.org/10.1364/JOSAA.2.001857


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Abstract

In this paper we deal with the problem of detecting and segmenting objects in textured dark-field digital imagery for automated visual-inspection applications. We first present a technique for correcting optical shading effects in conventional dark-field microscopy. After compensating for possible imperfections in the optical setting we address the problem of segmenting objects (defects) in textured dark-field images. The technique that we will follow is based on a sequential application of local operators, which serves the purpose of clustering the object and the background gray levels. This procedure can be considered an extension of average-thresholding-type techniques. Both algorithms for shading correction and object segmentation have fast implementations in general-purpose image-processing pipeline architectures, and therefore they are appealing to real-time computer vision applications. Computational examples showing the appropriateness of the shading-correction procedure as well as the effectiveness of the segmentation wil be discussed.

© 1985 Optical Society of America

History
Original Manuscript: October 17, 1984
Manuscript Accepted: June 13, 1985
Published: November 1, 1985

Citation
Jorge L. C. Sanz, Fritz Merkle, and Kwan Y. Wong, "Automated digital visual inspection with dark-field microscopy," J. Opt. Soc. Am. A 2, 1857-1862 (1985)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-2-11-1857


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References

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