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Paper Abstract and Keywords
Presentation 2010-11-18 14:30
An improvement of correction for lens distortion in information retrieval from printed image by using cellular phones with cameras
Hiroshi Kudo, Takafumi Shono, Mitsuji Muneyasu, Yoshiko Hanada (Kansai Univ.) CAS2010-71 CST2010-44
Abstract (in Japanese) (See Japanese page) 
(in English) The information retrieval from the printed image by using a cellular phone attracts much attention. In this paper, we propose an improvement for the correction method of the lens distortion in capturing the image with the cellular phone. In the conventional method, a distortion coefficient has been determined based on the line based correction of radial distortion. This method has directly applied each candidate of the distortion coefficient in the predefined range to the captured image and the correctness of the applied distortion coefficient has been verified. However, many processing time should be required because of a lot of verified points. Therefore, to improve the processing speeds, the golden section search method for the estimation of the distortion coefficients is adopted. Moreover we propose an improvement method for the better accuracy of the estimation of the distortion coefficients. In the proposed method, all sides of the image are used for the correction. The experimental result shows the reduction of the processing time and the estimation accuracy of the distortion coefficient.
Keyword (in Japanese) (See Japanese page) 
(in English) watermark / lens distortion / golden section method / printed image / estimation of distortion coefficient / / /  
Reference Info. IEICE Tech. Rep., vol. 110, Nov. 2010.
Paper #  
Date of Issue 2010-11-11 (CAS, CST) 
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 CAS2010-71 CST2010-44

Conference Information
Committee MSS CAS  
Conference Date 2010-11-18 - 2010-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Graphs, Petri Nets, Neural Networks, etc 
Paper Information
Registration To MSS 
Conference Code 2010-11-CST-CAS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An improvement of correction for lens distortion in information retrieval from printed image by using cellular phones with cameras 
Sub Title (in English)  
Keyword(1) watermark  
Keyword(2) lens distortion  
Keyword(3) golden section method  
Keyword(4) printed image  
Keyword(5) estimation of distortion coefficient  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Hiroshi Kudo  
1st Author's Affiliation Kansai Univeristy (Kansai Univ.)
2nd Author's Name Takafumi Shono  
2nd Author's Affiliation Kansai Univeristy (Kansai Univ.)
3rd Author's Name Mitsuji Muneyasu  
3rd Author's Affiliation Kansai Univeristy (Kansai Univ.)
4th Author's Name Yoshiko Hanada  
4th Author's Affiliation Kansai Univeristy (Kansai Univ.)
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Speaker Author-1 
Date Time 2010-11-18 14:30:00 
Presentation Time 25 minutes 
Registration for MSS 
Paper # CAS2010-71, CST2010-44 
Volume (vol) vol.110 
Number (no) no.283(CAS), no.284(CST) 
Page pp.37-40 
#Pages 4 
Date of Issue 2010-11-11 (CAS, CST) 

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