The independent components of natural images are perceptually dependent

Matthias Bethge; Thomas V. Wiecki; Felix A. Wichmann

doi:10.1117/12.711133

15 February 2007 The independent components of natural images are perceptually dependent

Matthias Bethge, Thomas V. Wiecki, Felix A. Wichmann

Proceedings Volume 6492, Human Vision and Electronic Imaging XII; 64920A (2007) https://doi.org/10.1117/12.711133
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States

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.

Citation Download 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 (15 February 2007); https://doi.org/10.1117/12.711133

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