OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 22, Iss. 14 — Jul. 15, 1983
  • pp: 2087–2094

Generalized chord transformation for distortion-invariant optical pattern recognition

David Casasent and Wen-Thong Chang  »View Author Affiliations


Applied Optics, Vol. 22, Issue 14, pp. 2087-2094 (1983)
http://dx.doi.org/10.1364/AO.22.002087


View Full Text Article

Enhanced HTML    Acrobat PDF (1546 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

An optical processor that realizes a generalized chord transformation is described. The wedge-ring detector samples of an autocorrelation are shown to be the histograms of the chord distributions. This dimensionality reduced set of features is used as the feature vector inputs for a Fisher linear classifier to determine the class of the input object independent of geometrical distortions. Initial discussions on the use of different classifiers, the polarity of the classifier’s output, and selection of the image training set are also advanced.

© 1983 Optical Society of America

History
Original Manuscript: February 19, 1983
Published: July 15, 1983

Citation
David Casasent and Wen-Thong Chang, "Generalized chord transformation for distortion-invariant optical pattern recognition," Appl. Opt. 22, 2087-2094 (1983)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-22-14-2087


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. H. J. Caulfield, R. Haimes, D. Casasent, Opt. Eng. 19, 152 (1980).
  2. D. Casasent, A. Furman, Appl. Opt. 16, 1662 (1977). [CrossRef] [PubMed]
  3. D. Casasent, D. Psaltis, Proc. IEEE 65, 77 (1977). [CrossRef]
  4. H. J. Caulfield, R. Haimes, Appl. Opt. 19, 181 (1980). [CrossRef] [PubMed]
  5. C. F. Hester, D. Casasent, Appl. Opt. 19, 1758 (1980). [CrossRef] [PubMed]
  6. D. Casasent, J. Pauly, D. Fetterly, Proc. Soc. Photo-Opt. Instrum. Eng. 302, 126 (1981).
  7. H. Kasdan, D. Meade, Proc. Electron. Opt. Syst. Des. 248 (1975).
  8. R. O. Duda, P. E. Hart, Pattern Classification and Scene Analysis (Wiley, New York, 1973); see also Y. T. Chien, Interactive Pattern Recognition (Dekker, New York, 1978).
  9. G. Tenery, IEEE Trans. Mil. Electron. ME-7, 196 (1963). [CrossRef]
  10. D. J. H. Moore, D. J. Parker, Pattern Recognition 6, 149 (1974). [CrossRef]
  11. D. G. Nichols, Opt. Commun. 43, 168 (1982). [CrossRef]
  12. J. Rau, J. Opt. Soc. Am. 56, 1490 (1966). [CrossRef]
  13. H. N. Kannapell, “Image Classification Based on a Three-Dimensional Angle Histogram,” M. Eng. Thesis, U. Louisville, Louisville (1981).
  14. S. P. Smith, A. K. Jain, Comput. Graphics Image Process. 20, 1699 (1982). [CrossRef]
  15. H. J. Caulfield, M. H. Weinberg, Appl. Opt. 21, 1699 (1982). [CrossRef] [PubMed]
  16. J. R. Leger, S. H. Lee, J. Opt. Soc. Am. 72, 556 (1982). [CrossRef]
  17. Z. H. Gu, J. R. Leger, S. H. Lee, J. Opt. Soc. Am. 72, 787 (1982). [CrossRef]
  18. T. Marill, D. M. Green, IEEE Trans. Inf. Theory IT-9, 11 (1963). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1 Fig. 2 Fig. 3
 
Fig. 4
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited