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Paper Abstract and Keywords
Presentation 2012-03-01 10:30
Automatic determination method of the threshold for print-type watermark detection
Akitaka Okou, Shinichiro Miyaoka (Tokyo Univ. of Tech.) SIS2011-55
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a watermarking method resistant to printing and capturing of images based on DCT. In the conventional method, for detection of watermarks embedded in the DCT region, it is necessary to determine the threshold. However the automatic determination method of the threshold has not been studied. Proposed method is a technique that can automatically determine this threshold by setting blocks expressing the threshold in the DCT region. We also consider the frequency band used for embedding watermarks. The conventional technique sets a limit on DCT region used for embedding watermarks to provide resistance to geometric transformations caused by the printing and capturing. If the deformation is compensated by applying the image registration, frequency band which were not used in the past study can be used for embedding watermarks. The experimental result clarified that the proposed method has the resistance to printing and capturing. It can also determine the threshold robustly.
Keyword (in Japanese) (See Japanese page) 
(in English) DCT / data embedding / Threshold Block Method / image registration / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 457, SIS2011-55, pp. 11-16, March 2012.
Paper # SIS2011-55 
Date of Issue 2012-02-23 (SIS) 
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)
Download PDF SIS2011-55

Conference Information
Committee SIS  
Conference Date 2012-03-01 - 2012-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Shibuya Satellite Class, Tokyo City Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Soft Computing, etc. 
Paper Information
Registration To SIS 
Conference Code 2012-03-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Automatic determination method of the threshold for print-type watermark detection 
Sub Title (in English)  
Keyword(1) DCT  
Keyword(2) data embedding  
Keyword(3) Threshold Block Method  
Keyword(4) image registration  
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1st Author's Name Akitaka Okou  
1st Author's Affiliation Tokyo University of Technology (Tokyo Univ. of Tech.)
2nd Author's Name Shinichiro Miyaoka  
2nd Author's Affiliation Tokyo University of Technology (Tokyo Univ. of Tech.)
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Speaker Author-1 
Date Time 2012-03-01 10:30:00 
Presentation Time 25 minutes 
Registration for SIS 
Paper # SIS2011-55 
Volume (vol) vol.111 
Number (no) no.457 
Page pp.11-16 
#Pages 6 
Date of Issue 2012-02-23 (SIS) 

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