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Paper Abstract and Keywords
Presentation 2012-12-12 15:40
Distribution estimation of hyperparameters in Markov random field model
Yoshinori Ohno, Kenji Nagata (Univ. Tokyo), Hayaru Shouno (UEC), Masato Okada (Univ. Tokyo/RIKEN) NC2012-86
Abstract (in Japanese) (See Japanese page) 
(in English) Recent advances in measurement techniques allow us to obtain a large quantity of imaging data in various natural science fields. These data can be analyzed by Markov random field (MRF) models which have made progress in information science. We can estimate hyperparameters in our MRF model, which is a probabilistic one, by the framework of Bayesian inference. When our MRF model is applied to diffusion systems which often appear in the natural sciences, a hyperparameter is an important parameter which corresponds to the diffusion coefficient. Thus, in this study, we calculate not only a point estimate but also a distribution estimate of hyperparameters to evaluate estimation reliability. Besides, we discuss the dependence of estimation accuracy and reliability on the number of pixels in imaging data.
Keyword (in Japanese) (See Japanese page) 
(in English) Markov random field model / hyperparameter / distribution estimation / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 345, NC2012-86, pp. 55-60, Dec. 2012.
Paper # NC2012-86 
Date of Issue 2012-12-05 (NC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee NC MBE  
Conference Date 2012-12-12 - 2012-12-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Toyohashi University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NC 
Conference Code 2012-12-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Distribution estimation of hyperparameters in Markov random field model 
Sub Title (in English)  
Keyword(1) Markov random field model  
Keyword(2) hyperparameter  
Keyword(3) distribution estimation  
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1st Author's Name Yoshinori Ohno  
1st Author's Affiliation The University of Tokyo (Univ. Tokyo)
2nd Author's Name Kenji Nagata  
2nd Author's Affiliation The University of Tokyo (Univ. Tokyo)
3rd Author's Name Hayaru Shouno  
3rd Author's Affiliation The University of Electro-Communications (UEC)
4th Author's Name Masato Okada  
4th Author's Affiliation The University of Tokyo/RIKEN (Univ. Tokyo/RIKEN)
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Date Time 2012-12-12 15:40:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2012-86 
Volume (vol) vol.112 
Number (no) no.345 
Page pp.55-60 
#Pages
Date of Issue 2012-12-05 (NC) 


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