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  4. Multi-Modal Mean-Fields via Cardinality-Based Clamping
 
conference paper

Multi-Modal Mean-Fields via Cardinality-Based Clamping

Baqué, Pierre
•
Fleuret, François
•
Fua, Pascal  
2017
30Th Ieee Conference On Computer Vision And Pattern Recognition (Cvpr 2017)
Conference on Computer Vision and Pattern Recognition (CVPR 2017)

Mean Field inference is central to statistical physics. It has attracted much interest in the Computer Vision community to efficiently solve problems expressible in terms of large Conditional Random Fields. However, since it models the posterior probability distribution as a product of marginal probabilities, it may fail to properly account for important dependencies between variables. We therefore replace the fully factorized distribution of Mean Field by a weighted mixture of such distributions, that similarly minimizes the KL-Divergence to the true posterior. By introducing two new ideas, namely, conditioning on groups of variables instead of single ones and using a parameter of the conditional random field potentials, that we identify to the temperature in the sense of statistical physics to select such groups, we can perform this minimization efficiently. Our extension of the clamping method proposed in previous works allows us to both produce a more descriptive approximation of the true posterior and, inspired by the diverse MAP paradigms, fit a mixture of Mean Field approximations. We demonstrate that this positively impacts real-world algorithms that initially relied on mean fields.

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Type
conference paper
DOI
10.1109/Cvpr.2017.458
Web of Science ID

WOS:000418371404042

Author(s)
Baqué, Pierre
Fleuret, François
Fua, Pascal  
Date Issued

2017

Publisher

Ieee

Publisher place

New York

Published in
30Th Ieee Conference On Computer Vision And Pattern Recognition (Cvpr 2017)
ISBN of the book

978-1-5386-0457-1

Total of pages

10

Series title/Series vol.

IEEE Conference on Computer Vision and Pattern Recognition

Start page

4303

End page

4312

Subjects

Mean-Fields

•

Inference

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CVLAB  
LIDIAP  
Event nameEvent placeEvent date
Conference on Computer Vision and Pattern Recognition (CVPR 2017)

Honolulu, Hawaii, USA

July 21-26, 2017

Available on Infoscience
June 30, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/138712
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