Sciweavers

31 search results - page 1 / 7
» Hierarchically compressed wavelet synopses
Sort
View
VLDB
2009
ACM
142views Database» more  VLDB 2009»
14 years 11 months ago
Hierarchically compressed wavelet synopses
Dimitris Sacharidis, Antonios Deligiannakis, Timos...
DCC
2007
IEEE
14 years 10 months ago
Nonuniform Compression in Databases with Haar Wavelet
Data synopsis is a lossy compressed representation of data stored into databases that helps the query optimizer to speed up the query process, e.g. time to retrieve the data from ...
S. Chen, A. Nucci
SSDBM
2003
IEEE
95views Database» more  SSDBM 2003»
14 years 4 months ago
A Quad-Tree Based Multiresolution Approach for Two-dimensional Summary Data
In many application contexts, like statistical databases, scientific databases, query optimizers, OLAP, and so on, data are often summarized into synopses of aggregate values. Su...
Francesco Buccafurri, Filippo Furfaro, Domenico Sa...
JCP
2007
118views more  JCP 2007»
13 years 10 months ago
Dynamic Nonuniform Data Approximation in Databases with Haar Wavelet
Abstract— Data synopsis is a lossy compressed representation of data stored into databases that helps the query optimizer to speed up the query process, e.g. time to retrieve the...
Su Chen, Antonio Nucci
CORR
2006
Springer
146views Education» more  CORR 2006»
13 years 11 months ago
The Haar Wavelet Transform of a Dendrogram
While there is a very long tradition of approximating a data array by projecting row or column vectors into a lower dimensional subspace the direct approximation of a data matrix ...
Fionn Murtagh