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SODA
2007
ACM
106views Algorithms» more  SODA 2007»
13 years 8 months ago
Embedding metrics into ultrametrics and graphs into spanning trees with constant average distortion
This paper addresses the basic question of how well can a tree approximate distances of a metric space or a graph. Given a graph, the problem of constructing a spanning tree in a ...
Ittai Abraham, Yair Bartal, Ofer Neiman
ICIAP
2007
ACM
14 years 7 months ago
Transformation invariant SOM clustering in Document Image Analysis
In this paper, we propose the combination of the Self Organizing Map (SOM) and of the tangent distance for effective clustering in Document Image Analysis. The proposed model (SOM...
Simone Marinai, Emanuele Marino, Giovanni Soda
ERCIMDL
2007
Springer
119views Education» more  ERCIMDL 2007»
14 years 1 months ago
Exploring Digital Libraries with Document Image Retrieval
In this paper, we describe a system to perform Document Image Retrieval in Digital Libraries. The system allows users to retrieve digitized pages on the basis of layout similaritie...
Simone Marinai, Emanuele Marino, Giovanni Soda
SODA
2007
ACM
123views Algorithms» more  SODA 2007»
13 years 8 months ago
Region-fault tolerant geometric spanners
We introduce the concept of region-fault tolerant spanners for planar point sets, and prove the existence of region-fault tolerant spanners of small size. For a geometric graph G ...
Mohammad Ali Abam, Mark de Berg, Mohammad Farshi, ...
SODA
2007
ACM
127views Algorithms» more  SODA 2007»
13 years 8 months ago
Line-of-sight networks
Random geometric graphs have been one of the fundamental models for reasoning about wireless networks: one places n points at random in a region of the plane (typically a square o...
Alan M. Frieze, Jon M. Kleinberg, R. Ravi, Warren ...