Illusory bands in orientation and spatial frequency: a cortical analog to Mach bands |
| |
Authors: | Essock Edward A Hansen Bruce C Haun Andrew M |
| |
Affiliation: | Department of Psychological and Brain Sciences, University of Louisville, Louisville, KY 40292, USA. essock@louisville.edu |
| |
Abstract: | Illusory bands at a luminance transition in space (ie an edge) are well known. Here we demonstrate illusory bands of enhanced orientations or spatial frequencies at transitions between higher-contrast and lower-contrast image content along the orientation and spatial-frequency dimensions--the dimensions of cortical spatial coding. We conclude that this illusion is a consequence of cortical-level suppression of units of similar orientations and spatial frequencies and serves to aid texture segmentation while providing efficient neural coding. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|