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TMI
2008
142views more  TMI 2008»
13 years 10 months ago
Wavelet Based Noise Reduction in CT-Images Using Correlation Analysis
Abstract-- The projection data measured in computed tomography (CT) and, consequently, the slices reconstructed from these data are noisy. We present a new wavelet based structurep...
Anja Borsdorf, Rainer Raupach, Thomas Flohr, Joach...
JSYML
2007
100views more  JSYML 2007»
13 years 10 months ago
Combinatorial principles weaker than Ramsey's Theorem for pairs
We investigate the complexity of various combinatorial theorems about linear and partial orders, from the points of view of computability theory and reverse mathematics. We focus ...
Denis R. Hirschfeldt, Richard A. Shore
ETT
2002
128views Education» more  ETT 2002»
13 years 10 months ago
Geographical and temporal characteristics of inter-POP flows: View from a single pop
In this paper, we study traffic demands in an IP bacbkone, identify the routes used by these demands, and evaluate traffic granularity levels that are attractive for improving the...
Supratik Bhattacharyya, Christophe Diot, Nina Taft...
JEA
1998
133views more  JEA 1998»
13 years 10 months ago
A New Deterministic Parallel Sorting Algorithm with an Experimental Evaluation
We introduce a new deterministic parallel sorting algorithm based on the regular sampling approach. The algorithm uses only two rounds of regular all-to-all personalized communica...
David R. Helman, Joseph JáJá, David ...
TVCG
2002
132views more  TVCG 2002»
13 years 10 months ago
Hierarchical Pixel Bar Charts
Simple presentation graphics are intuitive and easy-to-use, but only show highly aggregated data. Bar charts, for example, only show a rather small number of data values and x-y-pl...
Daniel A. Keim, Ming C. Hao, Umeshwar Dayal