The aim of this paper is to present a study where we evaluate the optimal inclusion of the texture orientation in the classification process. In this paper the orientation for each pixel in the image is extracted using the partial derivatives of the Gaussian function and the main focus of our work is centred on the evaluation of the local dominant orientation (which is calculated by combining t...

In this paper we present a new method for approximation of local 3D orientation based on Gaussian functions. Compared with current 3D steerability approaches our method achieves higher orientation resolution with lower complexity. This property enables us to solve challenging problems like multiple motion estimation and 3D complex surface analysis. We address the tessellation of a spherical sur...

IRON is a low level operator dedicated to the estimation of single and multiple local orientations in images. Previous works have shown that IRON is more accurate and more selective than Gabor and Steerable filters, for textures corrupted with Gaussian noise. In this paper, we propose two new features. The first one is dedicated to the estimation of orientation in images damaged by impulsive no...

In order to investigate the processes which integrate local orientation information in observers with strabismic amblyopia, we measured contrast thresholds for discriminating the global orientation of a pattern (3 "bars") comprised of Gabor patches. We found that in both eyes of amblyopic observers, as has been reported for normal observers [Saarinen, Levi & Shen (1997) Proceedings of the Natio...

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...

Neurons in visual cortex are selective for the orientation of a visual stimulus, while the receptive fields of their thalamic input are circular. Cortical orientation selectivity arises from the organization of both thalamic input and local cortical circuits. In this issue of Neuron, Schummers and colleagues provide evidence that the local circuit mechanisms contributing to orientation selectiv...