摘要
结合Logistic映射及混合光学双稳模型,提出一种新的复合混沌加密算法用于医学图像水印加密,并将加密后的水印嵌入医学图像小波域的NROI中。实验证明,复合混沌映射极大地增强了系统的安全性,所提出的盲检测算法在保护ROI的同时提高了水印抗JPEG压缩的鲁棒性,并对篡改、剪切、滤波等均具有良好的鲁棒性和透明性。
A new mixed chaotic encryption algorithm is proposed to encrypt the gray watermark which includes the important pathology information, and then embeds it into the NROI of DWT domain of the host image. The experimental results show that the mixed chaotic mapping enormously enhances the security of the system and the proposed blind algorithm can protect the ROI and survive successfully in JPEG compression, cropping, filtering, etc.
出处
《电讯技术》
2008年第1期56-59,共4页
Telecommunication Engineering
基金
湖南省信息产业厅资助项目(8972020)
关键词
图像处理
复合混沌系统
小波变换
数字水印
ROI
盲检测
image processing
mixed chaotic system
wavelet transform
digital watermarking
ROI
blind detection
