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Paper Abstract and Keywords
Presentation 2007-10-26 11:00
A Study on Optimal Binarization and Distortion-Tolerant Recognition of Color Characters in Scene Images
Minoru Yokobayashi, Toru Wakahara (Hosei Univ.) PRMU2007-110
Abstract (in Japanese) (See Japanese page) 
(in English) The proposed method of optimal binarization of color characters in scene images is based on selection of one optimal projection axis in the RGB color space using Otsu’s criterion and decision between figure and background using the black-white ratio along the image periphery and common characteristics of characters. Regarding distortion-tolerant recognition of binarized characters we compare our global affine transformation (GAT) correlation method against the well-known tangent distance. Experiments are made on a total of 698 character images extracted from the ICDAR 2003 robust OCR dataset, and we discuss the state-of-the-art and remaining problems. Also, against rotation ranging from -45 degrees to +45 degrees as applied to template images the GAT correlation method is found to be much robuster than the tangent distance.
Keyword (in Japanese) (See Japanese page) 
(in English) Optimal binarization / Otsu's criterion / Distortion-tolerant matching / Tangent distance / GAT correlation / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 281, PRMU2007-110, pp. 105-110, Oct. 2007.
Paper # PRMU2007-110 
Date of Issue 2007-10-18 (PRMU) 
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 PRMU2007-110

Conference Information
Committee PRMU  
Conference Date 2007-10-25 - 2007-10-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Hotel Matsushima Daikansou 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To PRMU 
Conference Code 2007-10-PRMU 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Optimal Binarization and Distortion-Tolerant Recognition of Color Characters in Scene Images 
Sub Title (in English)  
Keyword(1) Optimal binarization  
Keyword(2) Otsu's criterion  
Keyword(3) Distortion-tolerant matching  
Keyword(4) Tangent distance  
Keyword(5) GAT correlation  
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Keyword(8)  
1st Author's Name Minoru Yokobayashi  
1st Author's Affiliation Hosei University (Hosei Univ.)
2nd Author's Name Toru Wakahara  
2nd Author's Affiliation Hosei University (Hosei Univ.)
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Speaker Author-1 
Date Time 2007-10-26 11:00:00 
Presentation Time 25 minutes 
Registration for PRMU 
Paper # PRMU2007-110 
Volume (vol) vol.107 
Number (no) no.281 
Page pp.105-110 
#Pages 6 
Date of Issue 2007-10-18 (PRMU) 

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