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SIBGRAPI
2006
IEEE
15 years 12 months ago
A Computer-Assisted Colorization Algorithm based on Topological Difference
Region-based approaches to cel painting typically use shape similarity and topology relations between regions of consecutive animation frames. This paper presents a new colorizati...
Hedlena M. de A. Bezerra, Bruno Feijó, Luiz...
STOC
2006
ACM
113views Algorithms» more  STOC 2006»
15 years 12 months ago
Logarithmic hardness of the directed congestion minimization problem
We show that for any constant ε > 0, there is no Ω(log1−ε M)approximation algorithm for the directed congestion minimization problem on networks of size M unless NP ⊆ Z...
Matthew Andrews, Lisa Zhang
SAT
2004
Springer
85views Hardware» more  SAT 2004»
15 years 11 months ago
Visualizing the Internal Structure of SAT Instances (Preliminary Report)
Modern algorithms for the SAT problem reveal an almost tractable behavior on “real-world” instances. This is frequently contributed to the fact that these instances possess an ...
Carsten Sinz
ICDE
2006
IEEE
232views Database» more  ICDE 2006»
16 years 7 months ago
Dual Labeling: Answering Graph Reachability Queries in Constant Time
Graph reachability is fundamental to a wide range of applications, including XML indexing, geographic navigation, Internet routing, ontology queries based on RDF/OWL, etc. Many ap...
Haixun Wang, Hao He, Jeffrey Xu Yu, Jun Yang 0001,...
FOCS
1999
IEEE
15 years 10 months ago
Markovian Coupling vs. Conductance for the Jerrum-Sinclair Chain
We show that no Markovian Coupling argument can prove rapid mixing of the Jerrum-Sinclair Markov chain for sampling almost uniformly from the set of perfect and near perfect match...
V. S. Anil Kumar, H. Ramesh