CAJ | 학술논문

首先提出了一种简单的方框“模板”，并估计了该模板抵抗各种几何攻击的能力，在此基础上，一种小波域自适应的抗几何攻击水印算法被提出，该算法充分利用人眼视觉系统掩蔽特性，在DW T 域的低频子带中完成水印信息的嵌入工作，并利用所嵌入模板来估计和确定图像所经历的几何变换攻击。实验结果表明，所提出的算法不仅对常规的图像处理具有较强的鲁棒性，而且能够抵抗各类几何攻击，如平移、镜像、旋转、缩放和转置等，此外，该算法具有较好的不可感知性。
수선제출료일충간단적방광“모판”，병고계료해모판저항각충궤하공격적능력，재차기출상，일충소파역자괄응적항궤하공격수인산법피제출，해산법충분이용인안시각계통엄폐특성，재DW T 역적저빈자대중완성수인신식적감입공작，병이용소감입모판래고계화학정도상소경력적궤하변환공격。실험결과표명，소제출적산법불부대상규적도상처리구유교강적로봉성，이차능구저항각류궤하공격，여평이、경상、선전、축방화전치등，차외，해산법구유교호적불가감지성。
T his thesis first proposes a simple pane“template” ,makes estimation for template on resis‐ting all kinds of geometric attacks ,and proposes a self‐adaptive watermarking algorithm in DWT do‐main w hich robust to geometric distortion .In this algorithm ,according to the conceal quality of Hu‐man Visual System (HVS) ,a watermark was embedded in low band of DWT domain adaptively .It makes use of the template to estimate and confirm the geometric transformation of the image .The experimental results show that the algorithm is simple and efficient .T he proposed w atermarking al‐gorithm is imperceptible and robust against geometric distortions ,such as translating ,mirroring ,ro‐tating ,zooming and transposing .At the same time ,it is robust to general image attacks .