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| Presentation | 2009-09-24 10:55 Detection Method for Digital Watermark with Dual-Sided Correlation Tomotaka Harano, Masayoshi Nakamoto, Hideaki Kadota, Shuichi Ohno (Hiroshima Univ.)  CAS2009-26 NLP2009-62 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The watermark systems should be robust against common image processing operations, such as noise adding and JPEG compression. The correlation-based watermark systems are known as robust against common image processing operations. However, the correlation is usually one-sided correlation, so when the correlation between the discrete cosine transform (DCT) coefficients of original image and key sequence is negative value, it makes the robustness weak. In this paper, we propose the two-sided correlation based image watermark methods. In this method, we take into account the negative correlation in the detection process. By using this method, if the correlation between the DCT coefficients and key sequence is negative value, the robustness of the watermark is retained. Finally, we show the numerical example to illustrate the effectiveness of the proposed watermark systems. From the simulation results, we can see the robustness against JPEG compression, Gaussian noise and cropping is improved. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Digital watermarking / Copyright protection / Digital signature / Discrete cosine transform / Dual-sided correlation / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 199, CAS2009-26, pp. 13-18, Sept. 2009. | |
| Paper # | CAS2009-26 | |
| Date of Issue | 2009-09-17 (CAS, NLP) | |
| 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 | CAS2009-26 NLP2009-62 |
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| Conference Information | |
| Committee | CAS NLP |
| Conference Date | 2009-09-24 - 2009-09-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hiroshima Univ. Higashi Senda Campus |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | CAS |
| Conference Code | 2009-09-CAS-NLP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Detection Method for Digital Watermark with Dual-Sided Correlation |
| Sub Title (in English) | |
| Keyword(1) | Digital watermarking |
| Keyword(2) | Copyright protection |
| Keyword(3) | Digital signature |
| Keyword(4) | Discrete cosine transform |
| Keyword(5) | Dual-sided correlation |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tomotaka Harano |
| 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 | Hideaki Kadota |
| 3rd Author's Affiliation | Hiroshima University (Hiroshima Univ.) |
| 4th Author's Name | Shuichi Ohno |
| 4th Author's Affiliation | Hiroshima University (Hiroshima Univ.) |
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| Speaker | Author-1 |
| Date Time | 2009-09-24 10:55:00 |
| Presentation Time | 25 minutes |
| Registration for | CAS |
| Paper # | CAS2009-26, NLP2009-62 |
| Volume (vol) | vol.109 |
| Number (no) | no.199(CAS), no.200(NLP) |
| Page | pp.13-18 |
| #Pages | 6 |
| Date of Issue | 2009-09-17 (CAS, NLP) |
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