Amplitude spectra of natural images

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Reference

Tolhurst, D., Tadmor, Y., Chao, T. (1992). Amplitude spectra of natural images. Ophthalmic & Physiological Optics, 12(2): 229–232.

DOI

http://dx.doi.org/10.1111/j.1475-1313.1992.tb00296.x

Abstract

Several studies have suggested that the amplitude spectra of photographs of tiatural scenes are remarkably similar and have the form:

amplitude spatial frequency^(-1.0)

This is, of course, a straight line with slope of —1.0 when plotted on double logarithmic coordinates. We have examined the amplitude spectra of 135 digitized photographs of natural scenes and have found that relatively few images conform exactly to the suggestion. About 25yi> of the images in our sample have spectra which show significant curvature when plotted on log-log coordinates. The best-fitting regression lines have slopes that range from —0.8 to —1.5; the average slope is - 1.2, rather steeper than previously suggested.

Extended Abstract

Bibtex

Used References

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Links

Full Text

http://onlinelibrary.wiley.com/doi/10.1111/j.1475-1313.1992.tb00296.x/pdf

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