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Paper Abstract and Keywords
Presentation 2023-01-26 10:20
Proposal of Watermarking Method with Magnification Ratio Estimation Using Pilot Signal
Rinka Kawano, Masaki Kawamura (Yamaguchi Univ.) EMM2022-63
Abstract (in Japanese) (See Japanese page) 
(in English) Resistance to attacks is required for watermarking methods.Conventional methods used error-correcting codes and spread spectrum to correct errors in the watermark.Also, embedding in the frequency domain and using SIFT feature points have been used to reduce errors.If the type and intensity of the attacks are identified, errors can be further reduced.There are several types of attacks, including scaling, rotating, clipping, etc.It is necessary to develop resistance to different types of attacks.Thus, we focus on the scaling resistance of watermarks and propose a method to estimate the magnification ratio using a grid of pilot signals.As the stego-image is magnified or reduced, the grid interval of the pilot signal also changes.Thus, the magnification ratio can be estimated from the grid intervals.Therefore, we propose a watermarking method introducing a pilot signal into the method using SIFT feature points and the DFT domain.At extraction, the watermarks are extracted using the magnification ratio estimated by the pilot signal.The accuracy of the magnification ratio estimated by our method was evaluated in terms of the relative error of the ratio.The bit error rate of watermark was compared between the proposed method and the cases where the magnification ratio was either unknown or known.The results showed that the proposed method could reduce the errors of the watermarks by the estimated magnification ratio.
Keyword (in Japanese) (See Japanese page) 
(in English) watermarking method / SIFT feature points / discrete Fourier transform / pilot signal / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 368, EMM2022-63, pp. 13-18, Jan. 2023.
Paper # EMM2022-63 
Date of Issue 2023-01-19 (EMM) 
ISSN 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 EMM2022-63

Conference Information
Committee EMM  
Conference Date 2023-01-26 - 2023-01-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Sense of Presence, Universal Media, Digital Entertainment, etc. 
Paper Information
Registration To EMM 
Conference Code 2023-01-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Proposal of Watermarking Method with Magnification Ratio Estimation Using Pilot Signal 
Sub Title (in English)  
Keyword(1) watermarking method  
Keyword(2) SIFT feature points  
Keyword(3) discrete Fourier transform  
Keyword(4) pilot signal  
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1st Author's Name Rinka Kawano  
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 2023-01-26 10:20:00 
Presentation Time 25 minutes 
Registration for EMM 
Paper # EMM2022-63 
Volume (vol) vol.122 
Number (no) no.368 
Page pp.13-18 
#Pages 6 
Date of Issue 2023-01-19 (EMM) 

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