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Paper Abstract and Keywords
Presentation 2008-07-25 15:20
The Use of Hadamard Matrix as a Secret Key in Digital Image Watermarking
Keita Hamano, Masayoshi Nakamoto, Takao Hinamoto (Hiroshima Univ.) SIP2008-88 WBS2008-26
Abstract (in Japanese) (See Japanese page) 
(in English) Digital watermarking is a copyright protection method by embedding watermark data in the digital contents. In this work, we propose the correlation based image watermark method in which the watermark data is embedded in the Hadamard transform domain. In general, the number of Hadamard matrices is quite a few. So we keep a Hadamard matrix as a secret key of watermark and can prove the copyright of the digital contents. Also, we show the design method of key sequence which is more robust against attack such as JPEG compression and Gaussian noise by using simulated annealing (SA) method. Finally, we show the robustness of the proposed watermarking method against JPEG compression.
Keyword (in Japanese) (See Japanese page) 
(in English) Digital watermarking / Copyright protection / Digital signature / Hadamard transform / simulated annealing method / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 164, SIP2008-88, pp. 67-72, July 2008.
Paper # SIP2008-88 
Date of Issue 2008-07-18 (SIP, WBS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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)
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Conference Information
Committee SIP WBS  
Conference Date 2008-07-24 - 2008-07-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Hiroshima Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIP 
Conference Code 2008-07-SIP-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The Use of Hadamard Matrix as a Secret Key in Digital Image Watermarking 
Sub Title (in English)  
Keyword(1) Digital watermarking  
Keyword(2) Copyright protection  
Keyword(3) Digital signature  
Keyword(4) Hadamard transform  
Keyword(5) simulated annealing method  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Keita Hamano  
1st Author's Affiliation Hiroshima University (Hiroshima Univ.)
2nd Author's Name Masayoshi Nakamoto  
2nd Author's Affiliation Hiroshima University (Hiroshima Univ.)
3rd Author's Name Takao Hinamoto  
3rd Author's Affiliation Hiroshima University (Hiroshima Univ.)
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Speaker Author-1 
Date Time 2008-07-25 15:20:00 
Presentation Time 25 minutes 
Registration for SIP 
Paper # SIP2008-88, WBS2008-26 
Volume (vol) vol.108 
Number (no) no.164(SIP), no.166(WBS) 
Page pp.67-72 
#Pages 6 
Date of Issue 2008-07-18 (SIP, WBS) 

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