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Paper Abstract and Keywords
Presentation 2015-09-08 14:50
Model Selection from the q-Exponential Distribution for Constructing an Organ Point Distribution Model
Mitsunori Yamada, Hidekata Hontani, Hiroshi Matsuzoe (NIT) MI2015-54
Abstract (in Japanese) (See Japanese page) 
(in English) The authors propose a method that selects an appropriate distribution model for accurately representing statistics of the shape of an organ with a PDM (Point Distribution Model).
Normal distributions are widely employed for representing the statistical models in PDMs because the normal distributions have small number of parameters to be estimated and because the normal distributions make the inference for the registration of the models easier.
A set of training data often includes some data of which Mahalanobis distances from the mean are much larger than those of the other data and the values of the estimated parameters can be inaccurate when such the data are included if you employ the normal distribution for the model representation.
The authors employ a $q$-exponential distribution in order to handle this problem.
The $q$-exponential distribution includes the normal distribution and the student-t distribution.
Given a set of training data, the proposed method selects an appropriate distribution from the $q$-exponential ones for each region of a target organ in order to represent the statistical model of the target organ accurately.
Using the proposed method for constructing a statistical model of the liver, the authors found that distributions with longer tails were selected in the regions that faced the inside of the body.
Keyword (in Japanese) (See Japanese page) 
(in English) Point Distribution Model(PDM) / Model Selection / q-exponential distribution / AIC / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 218, MI2015-54, pp. 31-34, Sept. 2015.
Paper # MI2015-54 
Date of Issue 2015-09-01 (MI) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 MI  
Conference Date 2015-09-08 - 2015-09-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. of Electro-communications 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Machine learning and its application to medical image processing 
Paper Information
Registration To MI 
Conference Code 2015-09-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Model Selection from the q-Exponential Distribution for Constructing an Organ Point Distribution Model 
Sub Title (in English)  
Keyword(1) Point Distribution Model(PDM)  
Keyword(2) Model Selection  
Keyword(3) q-exponential distribution  
Keyword(4) AIC  
1st Author's Name Mitsunori Yamada  
1st Author's Affiliation Nagoya Institute of Technology (NIT)
2nd Author's Name Hidekata Hontani  
2nd Author's Affiliation Nagoya Institute of Technology (NIT)
3rd Author's Name Hiroshi Matsuzoe  
3rd Author's Affiliation Nagoya Institute of Technology (NIT)
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Speaker Author-1 
Date Time 2015-09-08 14:50:00 
Presentation Time 25 minutes 
Registration for MI 
Paper # MI2015-54 
Volume (vol) vol.115 
Number (no) no.218 
Page pp.31-34 
Date of Issue 2015-09-01 (MI) 

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