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Paper Abstract and Keywords
Presentation 2012-11-17 14:20
A model of view prediction in three dimensional object recognition
Toru Ueno, Nobuhiko Asakura, Takafumi Sasaoka, Toshio Inui (Kyoto Univ.) NC2012-70
Abstract (in Japanese) (See Japanese page) 
(in English) Previous studies have identified two processes for view-invariant 3-D object recognition. One is a view-based process that uses the 2-D image features of an object from a particular viewpoint, and the other is a structural-description process that includes verification of the spatial relations between distinct parts of the object. The view-based process requires generalization from stored view information to novel views. In this study, we model the mechanism of view generalization as a form of view prediction, and propose a neural network based on the generalized radial basis function (GRBF) network. The input of the network is a pair of 2-D views of a paper-clip object. These views are separated by a 10 degree rotation along the vertical axis. We trained the network to output a view of the same object after a further 10 degree rotation. Following training, the network was capable of predicting rotated views not only for a set of training objects but also for untrained objects. We then introduced a feedback loop from the output to the input, in order to investigate whether the network could predict views with larger rotations. The prediction error increased with the amount of rotation, but a prediction accuracy of about 80% was still achieved with rotations of up to 30 degrees. We demonstrated that the accuracy as a function of rotations is consistent with the human performance in the recognition experiment using paper-clip objects reported in the previous study.
Keyword (in Japanese) (See Japanese page) 
(in English) Object recognition / Mental rotation / GRBF neural network / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 298, NC2012-70, pp. 51-56, Nov. 2012.
Paper # NC2012-70 
Date of Issue 2012-11-09 (NC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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 MBE NC  
Conference Date 2012-11-16 - 2012-11-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) BCI/BMI, NC and MBE 
Paper Information
Registration To NC 
Conference Code 2012-11-MBE-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A model of view prediction in three dimensional object recognition 
Sub Title (in English)  
Keyword(1) Object recognition  
Keyword(2) Mental rotation  
Keyword(3) GRBF neural network  
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1st Author's Name Toru Ueno  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Nobuhiko Asakura  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Takafumi Sasaoka  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Toshio Inui  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2012-11-17 14:20:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2012-70 
Volume (vol) vol.112 
Number (no) no.298 
Page pp.51-56 
#Pages
Date of Issue 2012-11-09 (NC) 


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