Iris recognition has expanded from controlled settings to uncontrolled settings (on the move, from a distance) where blur is more likely to be present in the images. More research is needed to quantify the impact of blur on iris recognition. In this paper we study the effect of out-of-focus blur on iris recognition performance from images captured with out-of-focus blur produced at acquisition....

This paper analyzes the behavior of diierent junction models in scale space. In this perspective, we study the behavior of linear models (L,Y and X models) and linear multi-models (two adjacent corners with innnite extent and a closed triangular model) with constant illumination, linear models with non-constant illumination and a non-linear model (curved junctions). The study shows under which ...

Tracking a moving person is challenging because a person’s appearance in images changes significantly due to articulation, viewpoint changes, and lighting variation across a scene. And different people appear differently due to numerous factors such as body shape, clothing, skin color, and hair. In this thesis, a multi-cue tracking technique is introduced that uses prior information about the 2...

This paper discusses the implementation of several edge recognition systems: Sobel; Laplacian of Gaussian; and Canny, on commerically available Datacube MaxVideo image-processing hardware at or near frame rate. Any approximations necessary to operate at these throughput rates are described and a comparison made between the output of these systems and slower implementations on general-purpose ma...

With the increasing availability of low-cost – yet precise – depth cameras, “texture+depth” content has become more and more popular in several computer vision and 3D rendering tasks. Indeed, depth images bring enriched geometrical information about the scene which would be hard and often impossible to estimate from conventional texture pictures. In this paper, we investigate how the geometric ...

Touch screens are immensely popular in the modern world. They have reached the pinnacle of their success in mobile phones. Touch screens, along with the Android OS, have completely revolutionized the cell phone and have led to the creation of the smart-phone as we know it today. These touch screens are generally resistive or capacitive. A third type exists, which is the image processing based t...

Foveal detection thresholds for LM and CM Gaussian blobs in the presence of visible, laterally placed blobs (separations of 0-6°) were measured monocularly and dichoptically in observers with normal vision. In the monocular and dichoptic viewing conditions, masking occurs for overlapping blobs, followed by facilitation when they are completely separated (2-8 blob sd units under monocular condit...

Multiwavelength observations of high energy flare in 1996 from 3C 279 seems to favour the so called mirror model between different inverse Compton scattering models proposed as a possible explanation of gamma-ray emission in blazars. We performed kinematic analysis of the relativistic blob mirror system and found that only part of the mirror located very close to the jet axis (very likely insid...

Crohn’s disease commonly affects the small and large intestines. Its symptoms include ulcers and intestinal stenosis, and its diagnosis is currently performed using an endoscope. However, because the endoscope cannot pass through the stenosed parts of the intestines, diagnosis of the entire intestines is difficult. A CT image-based method is expected to become an alternative way for the diagnos...