Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 22 July 1983:
Vol. 221. no. 4608, pp. 382 - 385
DOI: 10.1126/science.6867716
Prev | Table of Contents | Next

Articles

Science, Vol 221, Issue 4608, 382-385
Copyright © 1983 by American Association for the Advancement of Science

articles

Spectral consequences of photoreceptor sampling in the rhesus retina

JI Yellott Jr

Optical transforms were used to compute the power spectra of rhesus cones treated as arrays of image sampling points. Spectra were obtained for the central fovea, parafovea, periphery, and far periphery. All were consistent with a novel spatial sampling principle that introduces minimal noise for spatial frequencies below the Nyquist limits implied by local receptor densities, while frequencies above the nominal Nyquist limits are not converted into conspicuous moire patterns, but instead are scattered into broadband noise. This sampling scheme allows the visual system to escape aliasing distortion despite a large mismatch between retinal image bandwidth and the Nyquist limits implied by extrafoveal cone densities.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Fine Structure of Parvocellular Receptive Fields in the Primate Fovea Revealed by Laser Interferometry.
M. J. McMahon, M. J. M. Lankheet, P. Lennie, and D. R. Williams (2000)
J. Neurosci. 20, 2043-2053
   Abstract »    Full Text »    PDF »
Optical image quality and the cone mosaic.
A. Snyder, T. Bossomaier, and A Hughes (1986)
Science 231, 499-501
   Abstract »    PDF »
Consequences of spatial sampling by a human photoreceptor mosaic.
D. Williams and R Collier (1983)
Science 221, 385-387
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)