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| 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 |
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| 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 |
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| 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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| Keyword(8) | |
| 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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