We present results of the first systematic study to investigate the degree to which template aging occurs for iris biometrics. Our experiments use an image data set with approximately four years of elapsed time between the earliest and most recent images of an iris (23 subjects, 46 irises, 6,797 images). We compare the match and non-match distributions for short-time-lapse image pairs, acquired...

When foliating the extended Schwarzschild spacetime with maximal slices while using zero shift, slice stretching effects such as slice sucking and slice wrapping arise. These effects are due to the differential infall of Eulerian observers and can be quantified for arbitrary spatial coordinates in the context of even boundary conditions. As examples logarithmic and isotropic grid coordinates ar...

Mechanics is developed over a differentiable manifold as space of possible positions. Time is considered to fill a one–dimensional Riemannian manifold, so having the metric as lapse. Then the system is quantized with covariant instead of partial derivatives in the Schrödinger operator. PACS-numbers: 0320 (Classical mechanics of discrete systems; general mathematical aspects); 0365 (Quantum mech...

Time-lapse stereo – using natural illumination changes in stereo reconstruction for large scale outdoor scene is yet an unexplored application of spacetime stereo framework. In this project, we collect several time-lapse stereo data sets for further research use and also evaluate the performance of time-lapse stereo by comparing the quality of its disparity images to the ones using classic ster...

INTRODUCTION By their very nature, biological systems are dynamic, and a proper understanding of the cellular and molecular processes underlying living organisms and how to manipulate them is a prerequisite to combat diseases and improve human health care. One of the major challenges of current biomedical research, therefore, is to unravel not just the spatial organization of these complex syst...

A snapshot scan algorithm takes an “instantaneous” picture of a region of shared memory that may be updated by concurrent processes. Many complex shared memory algorithms can be greatly simplifkd by structuring them around the snapshot scan abstraction. Unfortunately, the substantial decrease in conceptual complexity is quite often countetkknced by an increase in computational complexity. In th...