Comparison Among Some Models of Orientation Selectivity
نویسندگان
چکیده
منابع مشابه
Comparison among some models of orientation selectivity.
Several models exist for explaining primary visual cortex (V1) orientation tuning. The modified feedforward model (MFM) and the recurrent model (RM) are major examples. We have implemented these two models, at the same level of detail, alongside a few newer variations, and thoroughly compared their receptive-field structures. We found that antiphase inhibition in the MFM enhances both spatial p...
متن کاملA Comparison among some Models of V1 Orientation Selectivity
Several models exist for explaining V1 orientation tuning. The modified feedforward model (MFM) and the recurrent model (RM) are major examples. We have implemented, at the same level of detail, these two models alongside a few newer variations, and thoroughly compared their receptive-field structures. We found that anti-phase inhibition in the MFM enhances both spatial phase information and or...
متن کاملOrientation selectivity: models and neural mechanisms
Introduction The focus of this article is mechanisms of orientation selectivity in the visual cortex. Although many scientists have been working on this issue for many years, it resists a final comprehensive explanation. (Here we will emphasize what is known about striate cortex, V1, of macaque monkeys, but many important sources cited are from cat visual cortex experiments). In V1 there is a t...
متن کاملComparison of different models of orientation selectivity based on distinct intracortical inhibition rules
Aim of this work is to present simple models of orientation selectivity in the visual cortex, which do not require massive computational effort. Three different models are compared, in order to gain deeper insight into the structure of cortical circuits generating inhibitory signals. All models represent a single hypercolumn. They differ as to the arrangement of inhibitory connections: in the f...
متن کاملImproved Orientation Selectivity for Orientation Estimation
Filtering of an image with rotated versions of an orientation selective filter yields a set of images which can be stacked to form an orientation space. Orientation space provides a means of analyzing overlapping and touching anisotropic textures. A set of rotated k order directional derivatives yields a discrete orientation space, which allows interpolation. Next we apply a deconvolution schem...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Neurophysiology
سال: 2006
ISSN: 0022-3077,1522-1598
DOI: 10.1152/jn.00015.2005