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ICASSP
2011
IEEE
12 years 11 months ago
Unsupervised vocabulary discovery using non-negative matrix factorization with graph regularization
In this paper, we present a model for unsupervised pattern discovery using non-negative matrix factorization (NMF) with graph regularization. Though the regularization can be appl...
Meng Sun, Hugo Van hamme
MICS
2008
72views more  MICS 2008»
13 years 7 months ago
Dynamic Multi-level Overlay Graphs for Shortest Paths
Multi-level overlay graphs represent a speed-up technique for shortest paths computation which is based on a hierarchical decomposition of a weighted directed graph G. They have b...
Francesco Bruera, Serafino Cicerone, Gianlorenzo D...
IPPS
2007
IEEE
14 years 2 months ago
Advanced Shortest Paths Algorithms on a Massively-Multithreaded Architecture
We present a study of multithreaded implementations of Thorup’s algorithm for solving the Single Source Shortest Path (SSSP) problem for undirected graphs. Our implementations l...
Joseph R. Crobak, Jonathan W. Berry, Kamesh Maddur...
WDAG
2000
Springer
112views Algorithms» more  WDAG 2000»
13 years 11 months ago
More Lower Bounds for Weak Sense of Direction: The Case of Regular Graphs
A graph G with n vertices and maximum degree G cannot be given weak sense of direction using less than G colours. It is known that n colours are always sufficient, and it was conje...
Paolo Boldi, Sebastiano Vigna
ICPR
2008
IEEE
14 years 2 months ago
Video denoising via discrete regularization on graphs
We present local and nonlocal algorithms for video denoising based on discrete regularization on graphs. The main difference between video and image denoising is the temporal redu...
Mahmoud Ghoniem, Youssef Chahir, Abderrahim Elmoat...