AMPLITUDE SPECTRA OF NATURAL IMAGES

被引：392

作者：

TOLHURST, DJ

TADMOR, Y

CHAO, T

机构：

[1] The Physiological Laboratory, University Ofcatttbrldge, Cambridge, CB2 3EG, Downing Street

来源：

OPHTHALMIC AND PHYSIOLOGICAL OPTICS | 1992年 / 12卷 / 02期

关键词：

D O I：

10.1111/j.1475-1313.1992.tb00296.x

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

Several studies have suggested that the amplitude spectra of photographs of natural scenes are remarkably similar and have the form: amplitude infinity 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 25% 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.

引用

页码：229 / 232

页数：4