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-  2018 

基于NSCT域HVS模型的抗打印扫描水印算法

Keywords: 人类视觉系统,NSCT,抗打印扫描,数字水印

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Abstract:

建立了新的NSCT(nonsubsampled contourlet transform)域人类视觉系统(human visible system,HVS)模型,在此基础上设计一种抗打印扫描算法.通过计算NSCT分解后的各个子带的HVS模型量化值,将全息共轭水印图替换HVS值最大的中频子带.实验结果表明,本文算法可以抵御一定程度的打印扫描攻击,具有较好的视觉掩蔽效果,PSNRS39.2 dB,实际水印嵌入容量为1/4×(M-2)×(M-2)bit.本文算法可以应用于对数字水印有抗打印扫描攻击需求的某些场合

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