子空間數位影像版權保護之浮水印技術：對稱與非對稱

Subspace Watermarking Method for Copyright Protection:Symmetric and Asymmetric

曾正男(Jengnan Tzeng)

指導教授 ： 陳宜良

共同指導教授 ： 黃文良(Wen-Liang Huang)

國立臺灣大學/理學院/數學研究所/博士(2004年)

https://doi.org/10.6342/NTU.2004.00681

摘要

對於保護數位影像資料，數位影像浮水印技術是一般公認有效的
保護方法。我們提供了一套浮水印技術，這套技術針對每一張受
保護的圖片計算最適合加入浮水印的空間。在此空間上我們分別
設計出對稱與非對稱的加密方式來保護影像。不論是對稱或是非
對稱的方法，保護影像的能力與錯誤判別的機率皆相似。我們提
供的方法可以提昇現有浮水印技術的保護能力。

關鍵字

浮水印 ； 非對稱性

並列摘要

The watermarking method has emerged as an important
tool for content tracing, authentication, and data hiding in
multimedia applications.
We propose a watermarking strategy in which the watermark of a host is selected from the robust

features of the estimated forged images of the host.
We introduce the concept of watermark space which is
obtained from Monte Carlo simulations of potential pirate attacks on the host image.
The subspace approach can be used for symmetric and asymmetric
watermarking scheme for copyright protection.
Both of them reveal the phenomena of a high detection probability and low false positive

probability.
In either scheme, significant efforts have been made to
explore the probability of successful hacking into our system.
The result shows our schemes sustain most known attacks.

並列關鍵字

Copyright protection ； projection attack ； asymmetric watermarking

參考文獻

[1] A. Adelsbach, S. Katzenbeisser, A. R. Sadeghi, Watermark detection with

9, pp. 266-278, 2003.

[2] M. Barni, F. Bartolini, T. Furon, A general framework for robust watermarking

security," Signal Processing, 83, pp. 2069-2084, 2003.

[3] W.Bender, D. Gruhl, and N. Morimoto, Techniques for data hiding," Proc.