Amplitude spectra of natural images

Aus de_evolutionary_art_org
Wechseln zu: Navigation, Suche


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



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


Used References

1. Carlson. C. R. Thresholds for perceived image sharpness. Photog. Sci. Kngng. 22,69-71 (1978)

2. Burton. G. J. and Moorhcad, 1, R. Color and spatial structure in natural scenes. AppL Opt. 26, 157-170 (1987|.

3. Field, D. J. Relations between the statistics of natural images and the response properties of cortical cells. J. Opt. Soc. Am. A 4, 2379 2394(1987).

4. Blakemore. C. and Campbell, F. W. On the existence of neurones in the human vi.sual system seleetively sensitive to the orientation and size of retina! images. J. Physioi 203. 237-260 (1969).

5. Field. D. J. What the statistics of natural images tell us about visual coding. SPtE 1077.269-276(1989).

6. Kni!!, D. C , Field, D. J. and Kersten. D. Human discrimination of fractal images. J. Opt. Soc. Am. A 1, 1113-1123(1990).

7. Tadmor, Y. and Tolhurst, D. J. Is the human visual system optimized for processing natural images? Perception 19, 398A (1990).

8. Tadmor. Y. and Tolhurst, D. J. The amplitude speelra of natural images (Abstract). Ophthal. Physiol. Opt. \1. 97 (1992).

9. Oppenheim, A. V. and Lim, J. S. The importance of phase in signals. Proc. IEEE. 69. 529-541 (1981|.

10. Piotrowski, L. N. and Campbell, F. W. A demonstration of the visual importance and flexibility of spatial-frequency amplitude and phase. Perception II, 337-346(1982).

11. Morgan, M. J., Ross. J. and Hayes, A. The relative imporlance of local phase and local amplitude in patchwise image reconstruction. Bml. Cyhern. 65, 113-119(1991).

12. Brettel, H., Caelli, T., Hilz, R. and Rentschler, I. Modelling perceptual distortion: amplitude and phase transmission in the human visual system. Human Neurohiol. 1, 61-67 (1982).


Full Text

intern file

Sonstige Links