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» Sublinear Time Algorithms for Metric Space Problems
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PODS
2010
ACM
215views Database» more  PODS 2010»
15 years 11 months ago
An optimal algorithm for the distinct elements problem
We give the first optimal algorithm for estimating the number of distinct elements in a data stream, closing a long line of theoretical research on this problem begun by Flajolet...
Daniel M. Kane, Jelani Nelson, David P. Woodruff
ICCV
2007
IEEE
16 years 8 months ago
Globally Optimal Affine and Metric Upgrades in Stratified Autocalibration
We present a practical, stratified autocalibration algorithm with theoretical guarantees of global optimality. Given a projective reconstruction, the first stage of the algorithm ...
Manmohan Krishna Chandraker, Sameer Agarwal, David...
ACSC
2002
IEEE
15 years 11 months ago
Suffix Vector: Space- and Time-Efficient Alternative to Suffix Trees
Suffix trees are versatile data structures that are used for solving many string-matching problems. One of the main arguments against widespread usage of the structure is its spac...
Krisztián Monostori, Arkady B. Zaslavsky, H...
ICMLA
2008
15 years 7 months ago
A Bayesian Approach to Switching Linear Gaussian State-Space Models for Unsupervised Time-Series Segmentation
Time-series segmentation in the fully unsupervised scenario in which the number of segment-types is a priori unknown is a fundamental problem in many applications. We propose a Ba...
Silvia Chiappa
FAW
2009
Springer
118views Algorithms» more  FAW 2009»
15 years 9 months ago
Space-Query-Time Tradeoff for Computing the Visibility Polygon
Abstract. Computing the visibility polygon, VP, of a point in a polygonal scene, is a classical problem that has been studied extensively. In this paper, we consider the problem of...
Mostafa Nouri, Mohammad Ghodsi