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Paper Abstract and Keywords
Presentation 2012-12-13 14:00
High-Accuracy Clustering Using LDA for Fast Japanese Character Recognition
Takahiro Sasaki, Hideaki Goto (Tohoku Univ.) PRMU2012-73 HIP2012-62
Abstract (in Japanese) (See Japanese page) 
(in English) Recognizing text in natural scene images is very important to develop various systems such as an assis-
tant device for visually-impaired people.
Since computational resources are limited on such mobile devices, a fast and precise Optical Character Recognition(OCR) algorithm is needed.
In feature vector based OCR systems, Nearest Neighbor (NN) search is often used, and its speed improvement is quite important.
In this paper, we develop an OCR scheme with tree-based clustering technique with LDA (Linear Discriminant Analysis), and the second-order
candidate reduction by linear search in lower dimensional spaces.
The experimental results show that our proposed method runs 33 times faster than the conventional linear search, at mere 0.3% accuracy drop.
Keyword (in Japanese) (See Japanese page) 
(in English) Japanese character recognition / nearest neighbor search / real-time processing / classi cation tree / Linear Discriminant analysis / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 357, PRMU2012-73, pp. 19-24, Dec. 2012.
Paper # PRMU2012-73 
Date of Issue 2012-12-06 (PRMU, HIP) 
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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF PRMU2012-73 HIP2012-62

Conference Information
Committee PRMU HIP  
Conference Date 2012-12-13 - 2012-12-14 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To PRMU 
Conference Code 2012-12-PRMU-HIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High-Accuracy Clustering Using LDA for Fast Japanese Character Recognition 
Sub Title (in English)  
Keyword(1) Japanese character recognition  
Keyword(2) nearest neighbor search  
Keyword(3) real-time processing  
Keyword(4) classi cation tree  
Keyword(5) Linear Discriminant analysis  
1st Author's Name Takahiro Sasaki  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Hideaki Goto  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2012-12-13 14:00:00 
Presentation Time 30 
Registration for PRMU 
Paper # IEICE-PRMU2012-73,IEICE-HIP2012-62 
Volume (vol) IEICE-112 
Number (no) no.357(PRMU), no.358(HIP) 
Page pp.19-24 
#Pages IEICE-6 
Date of Issue IEICE-PRMU-2012-12-06,IEICE-HIP-2012-12-06 

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