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Paper Abstract and Keywords
Presentation 2021-12-03 13:50
A Proposal of Shadow Removal from Document Image Based on Background Estimation Employing Median Filter
Sota Imahayashi, Mashiho Mukaida, Shuma Takeda, Eiji Uchino, Noriaki Suetake (Yamaguchi Univ.) SIS2021-26
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, the smartphone cameras are used more frequently as a method of capturing the text information from paper documents. When a shadow appears in the captured document image, it is difficult to detect and recognize characters because the color of the characters and the color of the shadows are similar. For this reason, many methods have been proposed to remove shadow from document image. However, these methods produce artifacts in the borders of the shadow areas, and this makes difficult to detect characters. In this paper, we propose an effective method to remove the shadows. The proposed method employs median filter to estimate background image and removes shadows. The effectiveness of the proposed method is confirmed by various experiments.
Keyword (in Japanese) (See Japanese page) 
(in English) Document image / Shadow removal method / Morphological operations / Median filter / Background image / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 284, SIS2021-26, pp. 26-31, Dec. 2021.
Paper # SIS2021-26 
Date of Issue 2021-11-26 (SIS) 
ISSN 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)
Download PDF SIS2021-26

Conference Information
Committee SIS  
Conference Date 2021-12-03 - 2021-12-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIS 
Conference Code 2021-12-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Proposal of Shadow Removal from Document Image Based on Background Estimation Employing Median Filter 
Sub Title (in English)  
Keyword(1) Document image  
Keyword(2) Shadow removal method  
Keyword(3) Morphological operations  
Keyword(4) Median filter  
Keyword(5) Background image  
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Keyword(8)  
1st Author's Name Sota Imahayashi  
1st Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
2nd Author's Name Mashiho Mukaida  
2nd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
3rd Author's Name Shuma Takeda  
3rd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
4th Author's Name Eiji Uchino  
4th Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
5th Author's Name Noriaki Suetake  
5th Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2021-12-03 13:50:00 
Presentation Time 25 minutes 
Registration for SIS 
Paper # SIS2021-26 
Volume (vol) vol.121 
Number (no) no.284 
Page pp.26-31 
#Pages
Date of Issue 2021-11-26 (SIS) 


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