280 search results - page 24 / 56 » Approximate nearest neighbors using sparse representations |
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ORL
2011
14 years 4 months ago
2011
We derive a convex relaxation for cardinality constrained Principal Component Analysis (PCA) by using a simple representation of the L1 unit ball and standard Lagrangian duality. ...
MMM
2009
Springer
15 years 6 months ago
2009
Springer
Abstract. In this paper we address the task of image categorization using a new similarity measure on the space of Sparse Multiscale Patches (SMP). SMPs are based on a multiscale t...
ICIP
2004
IEEE
15 years 11 months ago
2004
IEEE
The dictionary approach to signal and image processing has been massively investigated in the last two decades, proving very attractive for a wide range of applications. The effec...
CORR
2010
Springer
14 years 9 months ago
2010
Springer
In this paper we show how the complexity of performing nearest neighbor (NNS) search on a metric space is related to the expansion of the metric space. Given a metric space we loo...
ISVD
2007
IEEE
15 years 3 months ago
2007
IEEE
Three strategies are presented for developing a knowledge-based statistical contact potential from computationally hydrated proteins that may be useful in studies of protein foldi...