摘要
提出了一种可实现盲检测的相位密钥型傅立叶计算全息(CGH)数字水印方法,在生成数字水印傅立叶全息图的参考光中,加入经改进后的G-S迭代算法生成的二维相位密钥。理论分析和实验结果表明,由于该相位密钥的频谱分布为位置和强度不同的一系列δ函数,因而能够避免提取过程中宿主图像的频谱和水印共轭像对水印图像提取产生的干扰,从而能在保证水印质量和加密性能的条件下实现盲检测。
A Fourier CGH digital watermarking method using phase-key for blind detection was reported.A two-dimensional phase-key that was generated by the improved G-S iterative algorithm was added in the reference waves,which was used to generate the CGH of the mark image.Theoretic analysis and the computer simulations show that the spectrum of the phase-key is composed of a series of δ functions with different parameters,so the spectrum of the host image and the conjugate image are separated from the mark image in ...
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2009年第8期1077-1081,共5页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(60577017
60777007)
关键词
数字水印
计算全息(CGH)
盲检测
相位密钥
G-S算法
digital watermarking
computer generate hologram（CGH）
blind detection
phase-key
G-S algorithm
