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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 33, No. 60 >


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Title: 適応量子化によるウェーブレット変換電子透かし
Other Titles: A Watermarking Scheme Based on Wavelet Transform Using Adaptive Quantization
Authors: 黒田, 英夫 / 上野, 洋平 / 藤村, 誠 / 前村, 葉子
Authors (alternative): Kuroda, Hideo / Ueno, Yohei / Fujimura, Makoto / Maemura, Yoko
Issue Date: Jan-2003
Citation: 長崎大学工学部研究報告 Vol.33(60) p.71-76, 2003
Abstract: Digital watermarking schemes need to have robustness to attacks, such as the processes of noise reduction and JPEG compression etc. From the viewpoint of the robustness, we paid attention to the low frequency areas LL_2 and LL_3 of wavelet transform in spite of the weakness of image quality degradation being easily visible. We propose a atermarking scheme based on the wavelet transform which uses an adaptive quantization methd for improvement of the image quality, and moreover, a determination method by majority occurrence for making the system robust to attacks. Simulation results show that the proposed methd have a good picture qualitv with robustness for JPEG attacks.
URI: http://hdl.handle.net/10069/5246
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 33, No. 60

Citable URI : http://hdl.handle.net/10069/5246

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