39 search results - page 6 / 8 » Constructing Optimal Wavelet Synopses |
TIT
2002
14 years 9 months ago
2002
We consider a two-dimensional problem of positron emission tomography where the random mechanism of the generation of the tomographic data is modeled by Poisson processes. The goa...
SIGMOD
1998
ACM
15 years 1 months ago
1998
ACM
Query optimization is an integral part of relational database management systems. One important task in query optimization is selectivity estimation, that is, given a query P, we ...
IJCV
2007
14 years 9 months ago
2007
Orthogonal and biorthogonal wavelets became very popular image processing tools but exhibit major drawbacks, namely a poor resolution in orientation and the lack of translation inv...
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ICDE
2004
IEEE
15 years 11 months ago
2004
IEEE
Twig queries represent the building blocks of declarative query languages over XML data. A twig query describes a complex traversal of the document graph and generates a set of el...
CORR
2010
Springer
14 years 9 months ago
2010
Springer
In this paper we characterize and construct novel oversampled filter banks implementing fusion frames. A fusion frame is a sequence of orthogonal projection operators whose sum can...