The feasibility of determining localized Ca(2+) influx using only wide-field fluorescence images was explored by imaging (using fluo-3) single channel Ca(2+) fluorescence transients (SCCaFTs), due to Ca(2+) entry through single openings of Ca(2+)-permeable ion channels, while recording unitary channel currents. Since the image obtained with wide-field optics is an integration of both in-focus a...

The scale invariant feature transform (SIFT) is a widely used interest operator for supporting tasks such as 3D matching, 3D scene reconstruction, panorama stitching, image registration and motion tracking. Although SIFT is reported to be robust to disparate radiometric and geometric conditions in visible light imagery, using the default input parameters does not yield satisfactory results when...

This paper presents a novel method for quickly filtering range data points to make object recognition in large 3D data sets feasible. The general approach, called " 3D cueing, " uses shape signatures from object models as the basis for a fast, probabilistic classification system which rates scene points in terms of their likelihood of belonging to a model. This algorithm, which could be used as...

In this paper, as a main theorem, we prove that the decision version of the Frobenius problem is Σ2 -complete under Karp reductions. Given a finite set A of coprime positive integers, we call the greatest integer that cannot be represented as a nonnegative integer combination of A the Frobenius number, and we denote it as g(A). We call a problem of finding g(A) for a given A the Frobenius probl...

Given a universe U := U1]· · ·]Ur, and a r-uniform family F ⊆ U1×· · ·×Ur, the r-dimensional matching problem asks if F admits a collection of k mutually disjoint sets. The special case when r = 3 is the classic 3D-Matching problem. Recently, several improvements have been suggested for these (and closely related) problems in the setting of randomized parameterized algorithms. Also, many approa...

This thesis describes a new framework for 3D surface landmarking and evaluates its performance for feature localisation on human faces. This framework has two main parts that can be designed and optimised independently. The first one is a keypoint detection system that returns positions of interest for a given mesh surface by using a learnt dictionary of local shapes. The second one is a labell...

This paper proposes a three-dimensional (3D) face recognition system using passive stereo vision. So far, the reported 3D face recognition techniques have used active 3D measurement methods to capture high-quality 3D facial information. However, active methods employ structured illumination (structure projection, phase shift, moire topography, etc.) or laser scanning, which is not desirable in ...

String rewriting systems have proved very useful to study monoids. In good cases, they give finite presentations of monoids, allowing computations on those and their manipulation by a computer. Even better, when the presentation is confluent and terminating, they provide one with a notion of canonical representative of the elements of the presented monoid. Polygraphs are a higher-dimensional ge...

Introduction: The OSIRIS [1] imaging experiment of the Rosetta spacecraft will image comet 67P/Churyumov-Gerasimenko in 2014-2015. During its journey, OSIRIS has imaged asteroid 2867 Steins on 5 September 2008. The fly-by was successful and returned more than 100 resolved images of the body as shown on Figure 1 [2]. The diamond’s shape of the body is remarkable. The surface presents several sma...

This paper surveys, in the first place, some basic facts from the classification theory of normal complex singularities, including details for the low dimensions 2 and 3. Next, it describes how the toric singularities are located within the class of rational singularities, and recalls their main properties. Finally, it focuses, in particular, on a toric version of Reid’s desingularization strat...