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PVLDB
2008
154views more  PVLDB 2008»
13 years 7 months ago
Indexing land surface for efficient kNN query
The class of k Nearest Neighbor (kNN) queries is frequently used in geospatial applications. Many studies focus on processing kNN in Euclidean and road network spaces. Meanwhile, ...
Cyrus Shahabi, Lu-An Tang, Songhua Xing
ICDE
2008
IEEE
182views Database» more  ICDE 2008»
14 years 9 months ago
SpaceTwist: Managing the Trade-Offs Among Location Privacy, Query Performance, and Query Accuracy in Mobile Services
In a mobile service scenario, users query a server for nearby points of interest but they may not want to disclose their locations to the service. Intuitively, location privacy may...
Man Lung Yiu, Christian S. Jensen, Xuegang Huang, ...
VLDB
2005
ACM
106views Database» more  VLDB 2005»
14 years 1 months ago
Adaptive Stream Filters for Entity-based Queries with Non-Value Tolerance
We study the problem of applying adaptive filters for approximate query processing in a distributed stream environment. We propose filter bound assignment protocols with the obj...
Reynold Cheng, Ben Kao, Sunil Prabhakar, Alan Kwan...
PSIVT
2007
Springer
170views Multimedia» more  PSIVT 2007»
14 years 1 months ago
Markov Random Fields and Spatial Information to Improve Automatic Image Annotation
Content-based image retrieval (CBIR) is currently limited because of the lack of representational power of the low-level image features, which fail to properly represent the actual...
Carlos Hernández-Gracidas, Luis Enrique Suc...
AVBPA
2005
Springer
312views Biometrics» more  AVBPA 2005»
14 years 1 months ago
Evaluation of Biometric Identification in Open Systems
This paper concerns the generalizability of biometric identification results from small-sized closed systems to larger open systems. Many researchers have claimed high identificati...
Michael Gibbons, Sungsoo Yoon, Sung-Hyuk Cha, Char...