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Proceedings Article

The independent components of natural images are perceptually dependent

[+] Author Affiliations
Matthias Bethge, Thomas V. Wiecki, Felix A. Wichmann

Max Planck Institute for Biological Cybernetics (Germany)

Proc. SPIE 6492, Human Vision and Electronic Imaging XII, 64920A (February 15, 2007); doi:10.1117/12.711133
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From Conference Volume 6492

  • Human Vision and Electronic Imaging XII
  • Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Scott J. Daly
  • San Jose, CA, United States | January 28, 2007

abstract

The independent components of natural images are a set of linear filters which are optimized for statistical independence. With such a set of filters images can be represented without loss of information. Intriguingly, the filter shapes are localized, oriented, and bandpass, resembling important properties of V1 simple cell receptive fields. Here we address the question of whether the independent components of natural images are also perceptually less dependent than other image components. We compared the pixel basis, the ICA basis and the discrete cosine basis by asking subjects to interactively predict missing pixels (for the pixel basis) or to predict the coefficients of ICA and DCT basis functions in patches of natural images. Like Kersten (1987)1 we find the pixel basis to be perceptually highly redundant but perhaps surprisingly, the ICA basis showed significantly higher perceptual dependencies than the DCT basis. This shows a dissociation between statistical and perceptual dependence measures.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Matthias Bethge ; Thomas V. Wiecki and Felix A. Wichmann
"The independent components of natural images are perceptually dependent", Proc. SPIE 6492, Human Vision and Electronic Imaging XII, 64920A (February 15, 2007); doi:10.1117/12.711133; http://dx.doi.org/10.1117/12.711133


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