68 search results - page 9 / 14 » Wavelet-Based Histograms for Selectivity Estimation |
EDBT
2006
ACM
15 years 9 months ago
2006
ACM
Current methods for selectivity estimation fall into two broad categories, synopsis-based and sampling-based. Synopsis-based methods, such as histograms, incur minimal overhead at ...
97
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BTW
2009
Springer
15 years 2 months ago
2009
Springer
: Cost-based optimizers in relational databases make use of data statistics to estimate intermediate result cardinalities. Those cardinalities are needed to estimate access plan co...
102
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EDBT
2002
ACM
15 years 9 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
73
Voted
ICIP
2007
IEEE
15 years 11 months ago
2007
IEEE
We present a method to compute the steganographic capacity for images, with odd-even based hiding in the quantized discrete cosine transform domain. The method has been generalize...
ACCV
2006
Springer
15 years 3 months ago
2006
Springer
We present a fast and robust method for moving object tracking directly in the compressed domain using features available in MPEG videos. DCT domain background subtraction in Y pla...