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ICPR
2004
IEEE
16 years 5 months ago
Systematic Static Shadow Detection
A systematic static shadow detection algorithm for color images is presented in this paper. The image is modeled by an undirected graph and the shadow detection is achieved throug...
Jian Yao, Zhongfei (Mark) Zhang
CPM
2004
Springer
87views Combinatorics» more  CPM 2004»
15 years 10 months ago
A Trie-Based Approach for Compacting Automata
We describe a new technique for reducing the number of nodes and symbols in automata based on tries. The technique stems from some results on anti-dictionaries for data compression...
Maxime Crochemore, Chiara Epifanio, Roberto Grossi...
AAIM
2007
Springer
123views Algorithms» more  AAIM 2007»
15 years 8 months ago
Efficient Algorithms for k -Disjoint Paths Problems on DAGs
Given an acyclic directed graph and two distinct nodes s and t, we consider the problem of finding k disjoint paths from s to t satisfying some objective. We consider four objectiv...
Rudolf Fleischer, Qi Ge, Jian Li, Hong Zhu
EMNLP
2007
15 years 6 months ago
Using Semantic Roles to Improve Question Answering
Shallow semantic parsing, the automatic identification and labeling of sentential constituents, has recently received much attention. Our work examines whether semantic role info...
Dan Shen, Mirella Lapata
ECML
2004
Springer
15 years 10 months ago
The Principal Components Analysis of a Graph, and Its Relationships to Spectral Clustering
This work presents a novel procedure for computing (1) distances between nodes of a weighted, undirected, graph, called the Euclidean Commute Time Distance (ECTD), and (2) a subspa...
Marco Saerens, François Fouss, Luh Yen, Pie...