Sciweavers

3932 search results - page 21 / 787
» Adaptive Index Structures
Sort
View
ICASSP
2011
IEEE
13 years 5 days ago
Structural similarity indices for high dynamic range imaging
In this paper, a structural similarity index is first proposed for two images with possibly different dynamic ranges and intensities as well as possibly small rotation and transl...
Zhengguo Li, Zijian Zhu, Susanto Rahardja
PODS
2009
ACM
130views Database» more  PODS 2009»
14 years 9 months ago
Secondary indexing in one dimension: beyond b-trees and bitmap indexes
Let be a finite, ordered alphabet, and consider a string x = x1x2 . . . xn n . A secondary index for x answers alphabet range queries of the form: Given a range [al, ar] , retu...
Rasmus Pagh, Srinivasa Rao Satti
PDP
2008
IEEE
14 years 2 months ago
Distributed Sparse Spatial Selection Indexes
Searching for similar objects in metric-space databases can be efficiently solved by using index data structures. A number of alternative sequential indexes have been proposed in...
Veronica Gil Costa, Mauricio Marín
ER
2009
Springer
111views Database» more  ER 2009»
14 years 3 months ago
A New Point Access Method Based on Wavelet Trees
Abstract. The development of index structures that allow ecient retrieval of spatial objects has been a topic of interest in the last decades. Most of these structures have been d...
Nieves R. Brisaboa, Miguel Rodríguez Luaces...
CIKM
2009
Springer
14 years 3 months ago
Inverted indexes vs. bitmap indexes in decision support systems
Bitmap indexes are widely used in Decision Support Systems (DSSs) to improve query performance. In this paper, we evaluate the use of compressed inverted indexes with adapted quer...
Truls A. Bjørklund, Nils Grimsmo, Johannes ...