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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 69, Iss. 6 — Jun. 1, 1979
  • pp: 914–916

Bandpass channels, zero-crossings, and early visual information processing

D. Marr, S. Ullman, and T. Poggio  »View Author Affiliations

JOSA, Vol. 69, Issue 6, pp. 914-916 (1979)

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Under appropriate conditions zero-crossings of a bandpass signal are very rich in information. The authors examine here the relevance of this result to the early stages of visual information processing, where zero-crossings in the output of independent spatial-frequency-tuned channels may contain sufficient information for much of the subsequent processing.

© 1979 Optical Society of America

D. Marr, S. Ullman, and T. Poggio, "Bandpass channels, zero-crossings, and early visual information processing," J. Opt. Soc. Am. 69, 914-916 (1979)

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  1. D. Marr, "Early processing of visual information," Phil. Trans. R. Soc. Lond. B 275, 483–524 (1976), p. 488.
  2. F. W. Campbell and J. G. Robson, "Application of Fourier analysis to the visibility of gratings," J. Physiol. (London) 197, 551–556 (1968).
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