Sciweavers

1632 search results - page 47 / 327
» Sublinear Time Algorithms for Metric Space Problems
Sort
View
PODS
2010
ACM
215views Database» more  PODS 2010»
15 years 8 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 5 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 8 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 4 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 7 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