基于HVS和关系的DCT域彩色图像水印方案  

Color image watermarking scheme based on HVS and relationship in DCT domain

作　　者：熊祥光[1] 王端理[1] 

机构地区：[1]贵州师范大学数学与计算机科学学院,贵州贵阳550001

出　　处：《计算机工程与科学》2014年第2期311-316,共6页Computer Engineering & Science

基　　金：贵州省科学技术厅;贵州师范大学联合科技基金资助项目(黔科合J字LKS[2011]7号)

摘　　要：提出了一种基于人类视觉系统和关系的离散余弦变换域水印技术。首先对二值水印图像进行混沌加密和Arnold置乱处理;其次对载体彩色图像的每一分量进行8×8分块的离散余弦变换;最后根据每一分块的亮度和纹理掩蔽特性和水印图像的像素取值来自适应调整选定位置的离散余弦变换系数的大小关系以嵌入水印。实验表明,提出的算法具有较好的透明性和抵抗攻击的能力,且在红色分量嵌入的水印比在蓝色或绿色分量嵌入的水印对滤波、有损压缩攻击等具有更好的鲁棒性。与同类算法相比,提出的算法具有更好的性能。A novel watermarking technique based on human visual system(HVS)and relationship is proposed in the discrete cosine transform(DCT)domain.Firstly,the binary watermarking image is processed by chaotic encryption and Arnold scrambling.Secondly,each component of the original color image is subdivided into blocks of size 8×8and is performed by DCT transform.Finally,according to the brightness and texture masking features of each sub-block and the watermarking pixel values,the relationship of the selected DCT coefficients is adaptively adjusted to embed the watermarking.Experiments show that the proposed algorithm has good transparency and the ability to resist a variety of attacks and the embedded watermarking in red component is more robust against compression and additive noise et al.than the embedded watermarking in the blue or green component.Compared with similar algorithms,the proposed algorithm has better performance.

关 键 词：彩色图像水印 离散余弦变换 人类视觉系统 关系 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]