| Literature DB >> 8917763 |
A van der Schaaf1, J H van Hateren.
Abstract
Power spectra of an extensive set of natural images were analysed. Both the total power in a spectrum (corresponding to image contrast) and its dependence on spatial frequency vary considerably between images, and also within images when considered as functions of orientation. A series of probabilistic models for power spectra enabled calculating the information obtained from prior knowledge of parameters describing spectra. Most information is gained from contrast, 1/f2 spatial frequency behaviour, and contrast as a function of orientation. Variations in spatial frequency behaviour are relatively unimportant. For oriented contrast, a bandwidth of 10-30 deg is sufficient to obtain most information.Mesh：
Year: 1996 PMID： 8917763 DOI： 10.1016/0042-6989(96)00002-8
Source DB: PubMed Journal: Vision Res ISSN： 0042-6989 Impact factor: 1.886