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中文摘要：
本文提出了一种基于共轭对称列率复数哈达码变换（CS-SCHT）的鲁棒水印算法.在水印嵌入时,选择图像的CS-SCHT系数幅度作为水印载体,同时设计一种新的人眼视觉系统改善含水印图像的不可见性.检测时,运用Kolmogorov-Smirno方法估计系数幅度的近似分布.然后根据该分布构造局部最优检测器.实验表明该变换适合于水印领域,新检测器具有良好的鲁棒性,且人眼视觉系统能够改善含水印图像的视觉质量.
英文摘要：
A new robust watermarking algorithm based on conjugate symmetric sequency-ordered complex Hadamard transform（CS-SCHT） is proposed in this paper.At the phase of embedding,the magnitude of the CS-SCHT coefficients of host image is selected as support of watermark,and a new human visual system is designed to improve the invisibility of marked image.Kolmogorov-Smirno method is used to estimate the approximate distribution of the coefficients＇ magnitude,and then a locally optimal detector is constructed based on the approximate distribution.Experimental results show that the CS-SCHT is suitable for watermark application,and the proposed detector and human visual system can provide good performance.
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