摘要
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,PSNR≥39.2dB,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.
In this paper,a new HVS（human visible system）model in NSCT（nonsubsampled contourlet transform）domain was established,and a print-scan resilient watermarking algorithm was proposed based on the model.The watermarking image generated through conjugating method substituted the subband of NSCT with the largest quantization value of HVS model.The experiments showed that the proposed scheme could be resilient to print-scan attack with good performance of invisibility of human vision（PSNR≥39.2 dB）and large embedding capacity1/4×（M-2）×（M-2）bits.This method may be useful to some occasions which ask for the watermarking algorithm being resilient to print-scan process.
作者
罗鹏
LUO Peng(Department of Electronic Technology,Engineering University of Arm Police Force, Xi＇ an 710086, Shaanxi, China)
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2018年第2期150-154,共5页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金资助项目(61402531)
关键词
人类视觉系统
NSCT
抗打印扫描
数字水印
HVS （human visible system）
NSCT （nonsubsampled contourlet transform）
print-scan resilient
watermarking
