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Results 11 - 20 of 87
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Pose estimation in conformal geometric algebra. Part II: Real-time pose estimation using extended feature concepts

by Bodo Rosenhahn, Gerald Sommer - Journal of Mathematical Imaging and Vision , 2005
"... Abstract. 2D-3D pose estimation means to estimate the relative position and orientation of a 3D object with respect to a reference camera system. This work has its main focus on the theoretical foundations of the 2D-3D pose estimation problem: We discuss the involved mathematical spaces and their in ..."
Abstract - Cited by 21 (15 self) - Add to MetaCart
and their interaction within higher order entities. To cope with the pose problem (how to compare 2D projective image features with 3D Euclidean object features), the principle we propose is to reconstruct image features (e.g. points or lines) to one dimensional higher entities

A Unified Framework for Providing Recommendations in Social Tagging Systems Based on Ternary Semantic Analysis

by Panagiotis Symeonidis, Ros Nanopoulos, Yannis Manolopoulos
"... Abstract—Social Tagging is the process by which many users add metadata in the form of keywords, to annotate and categorize items (songs, pictures, web links, products, etc.). Social tagging systems (STSs) can provide three different types of recommendations: They can recommend 1) tags to users, bas ..."
Abstract - Cited by 28 (4 self) - Add to MetaCart
and dimensionality reduction is performed using both the Higher Order Singular Value Decomposition (HOSVD) method and the Kernel-SVD smoothing technique. We perform experimental comparison of the proposed method against state-of-the-art recommendation algorithms with two real data sets (Last.fm and BibSonomy). Our

Spatial Representation and Reasoning using the N-Dimensional Projective Approach

by Jorge Pais, Carlos Pinto-ferreira - In Technical Report WS-00-08 of the AAAI2000 Workshop on Spatial and Temporal Granularity , 2000
"... In this paper, we introduce a novel pictorial approach for solving problems in n-dimensional Euclidean spaces called the n-dimensional projective approach. The projective approach is based on a hierarchical and modular architecture, where its ground module is rooted on geometrical concepts. The ..."
Abstract - Cited by 1 (1 self) - Add to MetaCart
real-world problems, where physical properties of entities exercise inuence on results. Introduction The area of spatial reasoning is fruitful on research work concerning one (Detcher et al. 1991) and two dimensional spaces (Retz-Schmidt 1988). However, in what respects to higher dimensional spaces

Space tensor conic programming

by Liqun Qi, Yinyu Ye , 2009
"... Space tensors appear in physics and mechanics, and they are real physical entities. Mathematically, they are tensors in the three-dimensional Euclidean space. In the research of diffusion magnetic resonance imaging, convex optimization problems are formed where higher order positive semi-definite sp ..."
Abstract - Cited by 7 (5 self) - Add to MetaCart
Space tensors appear in physics and mechanics, and they are real physical entities. Mathematically, they are tensors in the three-dimensional Euclidean space. In the research of diffusion magnetic resonance imaging, convex optimization problems are formed where higher order positive semi

On the Nash equilibria in decentralized parallel interference channels

by Luca Rose, Samir M. Perlaza - in IEEE Workshop on Game Theory and Resource Allocation for 4G , 2011
"... Abstract—In this paper, the 2-dimensional decentralized parallel interference channel (IC) with 2 transmitter-receiver pairs is modelled as a non-cooperative static game. Each transmitter is assumed to be a fully rational entity with complete information on the game, aiming to maximize its own indiv ..."
Abstract - Cited by 15 (11 self) - Add to MetaCart
Abstract—In this paper, the 2-dimensional decentralized parallel interference channel (IC) with 2 transmitter-receiver pairs is modelled as a non-cooperative static game. Each transmitter is assumed to be a fully rational entity with complete information on the game, aiming to maximize its own

NEW PROXIMITY-PRESERVING ORDERINGS FOR SPATIAL DATA

by Alan Saalfeld
"... This paper presents new methods for ordering vertices or edges in a tree (connected acyclic graph). The new orderings are called tree-orders; they can be constructed in linear time; and they are fully characterized by a useful proximity-preserving property called branch-recursion. The paper describe ..."
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describes how tree-ordering techniques can be applied to find orderings for other types of spatial entities: ordering points in the plane, ordering points in higher dimensional spaces, ordering vertices of any graph, ordering edges of any graph, ordering line segments in two-dimensional networks, ordering

Distributed Spatial Database for use with 3D Graphics Engines

by David A. Heitbrink, Sam K. Makki, Demetrios Kazakos
"... Abstract:- Many modern applications employ a spatial database system to perform management of the large amount of spatial or non linear data. These systems are employed in both real-time and non-real time applications, such as GPS/GIS systems, video games, and scientific databases. Most of these app ..."
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of these applications are three dimensional, but some can be extended to higher dimensions. The goal is to distribute the responsibilities of a real time three dimensional game server over multiple servers. By distributing the game server we can split the responsibilities of a single server among many servers

Representation, Optimization and Compression of High Dimensional Data

by Krasimir Kolarov - World Multiconference on Systemics, Cybernetics and Informatics SCI’98/ ISAS’98 , 1998
"... The exponential growth of available computing power opens the door for new capabilities in modeling the objects in the high dimensional real world that we live in. Traditionally we have manipulated data defined on simple entities such as the real line (e.g. audio), a rectangle in the plane (e.g. ima ..."
Abstract - Cited by 1 (1 self) - Add to MetaCart
The exponential growth of available computing power opens the door for new capabilities in modeling the objects in the high dimensional real world that we live in. Traditionally we have manipulated data defined on simple entities such as the real line (e.g. audio), a rectangle in the plane (e

New Perspectives on the Aharonov-Bohm Effect

by Mostafa E. El Demery , 2013
"... The Aharonov-Bohm effect is a quantum mechanical effect, that is, has no classical counterpart. The effect was predicted in 1959 in a seminal paper of Y. Aharonov and D. Bohm [AB59] in which they demonstrated that a beam of electrons is affected by the existence of the electric/magnetic field even t ..."
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that fields do have non-local features, i.e. action at a distance. Others have claimed that topological effects may interpret the effect in which potentials are modeled as connections in higher-dimensional fiber bun-dle geometries. The most recent argument has been proposed by Vaidman [Vai12] who claimed

Efficient Computation of Multivariate Barrier Crossing Probability and Its Applications in Credit Risk Models

by Joonghee Huh, Adam Kolkiewicz , 2006
"... In this paper we consider computational methods of finding exit probabilities for a class of multivariate stochastic processes. While there is an abundance of results for one-dimensional processes, for multivariate processes one has to relay on approximations or simulation methods. We adopt a Large ..."
Abstract - Cited by 4 (0 self) - Add to MetaCart
demonstrate that our method works better than other existing methods. We mainly focus on a 3-dimensional process, but our framework is extendible to higher dimensions. We present two applications of the proposed method in credit risk modelling. Firstly, we show that we can efficiently estimate the default
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