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TKDE
2008
158views more  TKDE 2008»
14 years 10 months ago
Hierarchical Clustering of Time-Series Data Streams
This paper presents a time series whole clustering system that incrementally constructs a tree-like hierarchy of clusters, using a top-down strategy. The Online Divisive-Agglomera...
Pedro Pereira Rodrigues, João Gama, Jo&atil...
CGF
2004
113views more  CGF 2004»
14 years 10 months ago
Coherent Hierarchical Culling: Hardware Occlusion Queries Made Useful
We present a simple but powerful algorithm for optimizing the usage of hardware occlusion queries in arbitrary complex scenes. Our method minimizes the number of issued queries an...
Jirí Bittner, Michael Wimmer, Harald Piring...
PRL
2002
94views more  PRL 2002»
14 years 9 months ago
A hierarchical tag-graph search scheme with layered grammar rules for spontaneous speech understanding
It has always been difficult for language understanding systems to handle spontaneous speech with satisfactory robustness, primarily due to such problems as the fragments, disflue...
Bor-shen Lin, Berlin Chen, Hsin-Min Wang, Lin-Shan...
SIGIR
2002
ACM
14 years 9 months ago
Effective collection metasearch in a hierarchical environment: global vs. localized retrieval performance
We compare standard global IR searching with user-centric localized techniques to address the database selection problem. We conduct a series of experiments to compare the retriev...
Jack G. Conrad, Changwen Yang, Joanne S. Claussen
TIP
2002
102views more  TIP 2002»
14 years 9 months ago
Hierarchical watermarking for secure image authentication with localization
Several fragile watermarking schemes presented in the literature are either vulnerable to vector quantization (VQ) counterfeiting attacks or sacrifice localization accuracy to impr...
Mehmet Utku Celik, Gaurav Sharma, Eli Saber, A. Mu...