CAJ | 학술논문

提出了一种基于原始图像的Tchebichef矩实现的几何攻击不变性第二代盲水印算法,利用原始图像的Tchebichef矩估计图像可能经历的几何攻击的参数来还原图像,其中,原始图像的Tchebichef矩可作为水印检测器的密钥.水印嵌入过程结合人类视觉系统的特性,且可在任何图像变换域中实现,给出了小波域的一种实现方法.水印检测过程采用独立分量分析技术不仅可以检测到水印而且可以提取水印,实现了真正意义上的盲检测.实验结果表明,该水印算法对于通用水印测试软件Stirmark提供的各种攻击具有很好的鲁棒性.
제출료일충기우원시도상적Tchebichef구실현적궤하공격불변성제이대맹수인산법,이용원시도상적Tchebichef구고계도상가능경력적궤하공격적삼수래환원도상,기중,원시도상적Tchebichef구가작위수인검측기적밀약.수인감입과정결합인류시각계통적특성,차가재임하도상변환역중실현,급출료소파역적일충실현방법.수인검측과정채용독립분량분석기술불부가이검측도수인이차가이제취수인,실현료진정의의상적맹검측.실험결과표명,해수인산법대우통용수인측시연건Stirmark제공적각충공격구유흔호적로봉성.
In this approach, a rotation, scaling and translation invariant blind second generation watermarking technique is proposed using Tchebichef moments of the original image to estimate the geometric distortion parameters of the corrupted watermarked images. The Tchebichef moments of original image can be used as private key of watermark extraction process. The characteristics of the human visual system are incorporated into the watermark embedding, and the embedding process can be performed in any image domain, including spatial and transform domain. A method in DWT domain is proposed in this paper. Independent Component Analysis is adopted by watermark detector so that the watermark can be correctly extracted but not merely detected. The experimental results show that this method has a good robustness to attacks produced by the popular watermarking test software Stirmark.