In recent years, iris recognition has received increasing attention due to its distinct characteristics. This paper proposes a new approach to iris recognition based on local orientation description. In this approach, a bank of Log-Gabor filters are used to capture local orientation characteristics of the iris so as to produce discriminating features. Experimental results show that the proposed...

This study conducts a content analysis with the use of NVivo software of the local news outlet, Idaho Statesman, and its articles from 1999-2012. This research focuses on two specific sexual orientation policy debates: hate crime prevention and the Boise city ordinance. These issues highlight examples of framing. The findings from this analysis highlight how a media can play a supporting role f...

We explored the contribution to perception of orientation-modulated textures of visual processes selective either for orientation contrast or orientation grouping. To distinguish between these two processes we manipulated the axis of local grouping of texture elements independently of the direction of global orientation modulation. The general question posed was whether visibility of texture st...

A simple mathematical model for the large-scale circuitry of primary visual cortex is introduced. It is shown that a basic cortical architecture of recurrent local excitation and lateral inhibition can account quantitatively for such properties as orientation tuning. The model can also account for such local effects as cross-orientation suppression. It is also shown that nonlocal state-dependen...

In this paper, we derive a model for analyzing the innuence of local cortical connections on the activities of neurons in V1. A set of orientation columns is arranged according to a measured orientation map. Orientation columns are connected by local excitatory and slightly more distributed inhibitory bers. Based on this geometrical model we demonstrate that (i) sharp and contrast{invariant ori...

Unifying approaches by amongst others Archimedes, Kepler, Goldberg, Caspar and Klug, Coxeter, Conway, extending on a previous formalization of the concept local symmetry preserving (lsp) operations, we introduce formal definition operations plane graphs that preserve orientation-preserving symmetries, but not necessarily orientation-reversing symmetries. This include, e.g., chiral Goldberg Conw...