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ICASSP
2011
IEEE
13 years 5 days ago
Sparse coding and dictionary learning based on the MDL principle
The power of sparse signal coding with learned overcomplete dictionaries has been demonstrated in a variety of applications and fields, from signal processing to statistical infe...
Ignacio Ramírez, Guillermo Sapiro
ICC
2008
IEEE
134views Communications» more  ICC 2008»
14 years 2 months ago
Non-Differential DSTBCs for Partially-Coherent Cooperative Communication
— In a distributed space-time coding scheme, based on the relay channel model, the relay nodes co-operate to linearly process the transmitted signal from the source and forward t...
Jagadeesh Harshan, B. Sundar Rajan
CORR
2006
Springer
98views Education» more  CORR 2006»
13 years 8 months ago
Enabling user-driven Checkpointing strategies in Reverse-mode Automatic Differentiation
This paper presents a new functionality of the Automatic Differentiation (AD) Tool tapenade. tapenade generates adjoint codes which are widely used for optimization or inverse prob...
Laurent Hascoët, Mauricio Araya-Polo
CVPR
2010
IEEE
14 years 4 months ago
On Growth and Formlets: Sparse Multi-Scale Coding of Planar Shape
This paper presents a sparse representation of 2D planar shape through the composition of warping functions, termed formlets, localized in scale and space. Each formlet subjects t...
Timothy Oleskiw, James Elder, Gabriel Peyr
CVPR
2011
IEEE
13 years 3 months ago
Online Detection of Unusual Events in Videos via Dynamic Sparse Coding
Real-time unusual event detection in video stream has been a difficult challenge due to the lack of sufficient training information, volatility of the definitions for both norm...
Bin Zhao, Li Fei-Fei, Eric Xing