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Paper Abstract and Keywords
Presentation 2015-03-12 14:10
Consideration of watermarking method embedding surrounding region of SIFT feature
Kouta Uchida, Masaki Kawamura (Yamaguchi Univ.) EMM2014-83
Abstract (in Japanese) (See Japanese page) 
(in English) We considered a watermarking method embedding surrounding regions of SIFT feature points. In digital watermarking, it is required to extract watermarks exactly from the image distorted by geometric attacks. The geometric attacks are the attacks such that the coordinate system of the image is distorted by scaling, clipping and so on. Since the coordinate system of the distorted image is out of alignment, it is difficult to extract watermarks. Therefore, watermarking methods by using scale invariant feature point should be explored. SIFT is one of scale invariant feature detectors. It can extract the feature points based on gradient in the image. For conventional method using SIFT, redetection ratio of SIFT feature points declines, since the watermarks are embedded into regions including SIFT feature points. To avoid negative influence of embedding watermarks, we proposed a watermarking method embedding surrounding regions of SIFT feature points. In decoder, a lot of watermarks can be extracted from detected SIFT feature points. The extracted watermarks have some errors. Therefore, we introduce majority voting. We compared the proposed method with the conventional method by using the redetection ratio of SIFT feature points and bit error rate of the watermarks. As the result, the proposed method can improve the redetection ratio. Also, our method can extract watermarks without errors from attacked stego images.
Keyword (in Japanese) (See Japanese page) 
(in English) digital watermark / SIFT / scaling / DCT / QIM / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 511, EMM2014-83, pp. 37-42, March 2015.
Paper # EMM2014-83 
Date of Issue 2015-03-05 (EMM) 
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)
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Conference Information
Committee EMM  
Conference Date 2015-03-12 - 2015-03-13 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To EMM 
Conference Code 2015-03-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Consideration of watermarking method embedding surrounding region of SIFT feature 
Sub Title (in English)  
Keyword(1) digital watermark  
Keyword(2) SIFT  
Keyword(3) scaling  
Keyword(4) DCT  
Keyword(5) QIM  
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1st Author's Name Kouta Uchida  
1st Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
2nd Author's Name Masaki Kawamura  
2nd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2015-03-12 14:10:00 
Presentation Time 90 minutes 
Registration for EMM 
Paper # EMM2014-83 
Volume (vol) vol.114 
Number (no) no.511 
Page pp.37-42 
#Pages 6 
Date of Issue 2015-03-05 (EMM) 

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