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Paper Abstract and Keywords
Presentation 2010-03-16 16:35
A Proposal of Low-resolution Character Recognition Method by Super-resolution based on Frame Selection
Ataru Okura, Daisuke Deguchi (Nagoya Univ.), Tomokazu Takahashi (Gifu shotoku Gakuen Univ.), Ichiro Ide, Hiroshi Murase (Nagoya Univ.) PRMU2009-324 HIP2009-209
Abstract (in Japanese) (See Japanese page) 
(in English) Portable cameras such as compact digital cameras and cell-phone cameras are widely used.
This trend increases the demand for character recognition techniques using them as input devices.
It is difficult to recognize characters accurately when we capture an image of a large area of a document and recognize characters in it,
because both the resolution and the quality of each character image become low.
In this report, we propose a method for recognizing very low-resolution characters by integrating information from multiple low-resolution character images in a video captured by a hand-held camera.
In particular, a super-resolution based on frame selection reconstructs high-resolution character images from multiple low-resolution character images.
The low-resolution frames to be used for super-resolution are selected so that the distorted frames should be excluded.
Then, an input character from multiple super-resoluted character images is recognized by a multi-frame-based subspace method.
The effectiveness of the proposed method was confirmed from results of experiment on actual captured character images.
Keyword (in Japanese) (See Japanese page) 
(in English) Character recognition / Super-resolution / Low-resolution character / Subspace method / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 470, PRMU2009-324, pp. 537-542, March 2010.
Paper # PRMU2009-324 
Date of Issue 2010-03-08 (PRMU, HIP) 
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)
Download PDF PRMU2009-324 HIP2009-209

Conference Information
Committee PRMU HIP  
Conference Date 2010-03-15 - 2010-03-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Kagoshima Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To PRMU 
Conference Code 2010-03-PRMU-HIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Proposal of Low-resolution Character Recognition Method by Super-resolution based on Frame Selection 
Sub Title (in English)  
Keyword(1) Character recognition  
Keyword(2) Super-resolution  
Keyword(3) Low-resolution character  
Keyword(4) Subspace method  
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1st Author's Name Ataru Okura  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Daisuke Deguchi  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Tomokazu Takahashi  
3rd Author's Affiliation GIfu Shotoku Gakuen University (Gifu shotoku Gakuen Univ.)
4th Author's Name Ichiro Ide  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
5th Author's Name Hiroshi Murase  
5th Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker Author-1 
Date Time 2010-03-16 16:35:00 
Presentation Time 25 minutes 
Registration for PRMU 
Paper # PRMU2009-324, HIP2009-209 
Volume (vol) vol.109 
Number (no) no.470(PRMU), no.471(HIP) 
Page pp.537-542 
#Pages 6 
Date of Issue 2010-03-08 (PRMU, HIP) 

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