December 2007
Volume 7, Issue 15
Free
Meeting Abstract  |   December 2007
Explaining crypsis and information content in the visual pathway using statistical properties of animal camouflage and natural scenes
Author Affiliations
  • Eric Larson
    Electrical and Computer Engineer, Oklahoma State University
  • Damon Chandler
    Electrical and COmputer Engineering Department, Oklahoma State University
Journal of Vision December 2007, Vol.7, 78. doi:10.1167/7.15.78
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      Eric Larson, Damon Chandler; Explaining crypsis and information content in the visual pathway using statistical properties of animal camouflage and natural scenes. Journal of Vision 2007;7(15):78. doi: 10.1167/7.15.78.

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      © 2015 Association for Research in Vision and Ophthalmology.

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Abstract

In nature, the co-evolution of cryptic coloration and predatory vision has “optimized” each system for survival. This study investigates the statistical similarities between animal camouflage and natural environments. Images from a database of animals in their natural environments were manually segmented into “animal” and “environment” regions. Using luminance and coloration, pixel- and Fourier-based statistics were calculated for these regions. We found that, for luminance, the mean and skewness between animals and their environments are significantly more correlated than variance or kurtosis. For coloration, we found that the mean chrominance between animals and their environments were highly correlated. In animals, red and green coloration is less likely to vary than in the environment, but blue and yellow coloration is more likely to vary. Additionally, Fourier analysis revealed that the power spectrum of camouflaged animals is similar to that found in natural scenes. We compare these results to human detection performance and quantify the extent to which ratings can be explained by statistical similarities. The implications of these findings toward efficient coding in the mammalian visual pathway are also discussed in the context of recent measures of the information content in natural scenes [Chandler & Field, JOSA A, 2007].

Larson, E. Chandler, D. (2007). Explaining crypsis and information content in the visual pathway using statistical properties of animal camouflage and natural scenes [Abstract]. Journal of Vision, 7(15):78, 78a, http://journalofvision.org/7/15/78/, doi:10.1167/7.15.78. [CrossRef]
© 2007 ARVO
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