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» Indeterminacy and Rough Approximation
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COMPGEOM
2011
ACM
13 years 6 days ago
Persistence-based clustering in riemannian manifolds
We present a clustering scheme that combines a mode-seeking phase with a cluster merging phase in the corresponding density map. While mode detection is done by a standard graph-b...
Frédéric Chazal, Leonidas J. Guibas,...
SIAMCOMP
1998
125views more  SIAMCOMP 1998»
13 years 8 months ago
Free Bits, PCPs, and Nonapproximability-Towards Tight Results
This paper continues the investigation of the connection between probabilistically checkable proofs (PCPs) and the approximability of NP-optimization problems. The emphasis is on p...
Mihir Bellare, Oded Goldreich, Madhu Sudan
PODC
2006
ACM
14 years 2 months ago
Object location using path separators
We study a novel separator property called k-path separable. Roughly speaking, a k-path separable graph can be recursively separated into smaller components by sequentially removi...
Ittai Abraham, Cyril Gavoille
EUROCRYPT
2005
Springer
14 years 2 months ago
Reducing Complexity Assumptions for Statistically-Hiding Commitment
We revisit the following question: what are the minimal assumptions needed to construct statistically-hiding commitment schemes? Naor et al. show how to construct such schemes bas...
Iftach Haitner, Omer Horvitz, Jonathan Katz, Chiu-...
FGR
2004
IEEE
218views Biometrics» more  FGR 2004»
14 years 10 days ago
Affine Correspondence Based Head Pose Estimation for a Sequence of Images by Using a 3D Model
This paper proposes a method of determining human head poses from a sequence of images. The main idea is to use some features in a 3D head model to generate a virtual fronto-paral...
Guoyuan Liang, Hongbin Zha, Hong Liu