摘要
将彩色载体图像在YIQ空间的Y分量进行三级小波分解,将空域的水印信息的高低位分段处理,并用伪随机序列与水印信息各位分别异或进行加密,按照人类视觉特性分别以不同的权重嵌入载体图像的频域中.实验结果表明,在面对大信息量的彩色水印信息时,使用这种方法嵌入的水印信息具有良好的不可见性和安全性,同时鲁棒性良好,能够抵挡常见的滤波、剪切、加噪声及压缩等攻击方式.
The luminance Y in YIQ mode of the host image was decomposed into 3-level wavelets by discrete wavelet tranfform,the watermark information was devided into several different frequency parts,and pseudo-random sequence xor was used with each bit of the watermark information encrypted to embed the spatial domain information with different weight into the frequency domain of host image according to the human visual characteristics.Experimental results show that the color watermark embedded with the proposed method is of invisibility and security,and is robust against the common image processing such as filtering,cropping,noise addition,compression and so on.
出处
《上海理工大学学报》
CAS
北大核心
2010年第5期475-478,492,共5页
Journal of University of Shanghai For Science and Technology
基金
国家"863"高技术研究发展计划资助项目(2007AA11Z247)
上海市科学技术委员会资助项目(08201202100)
关键词
伪随机序列
YIQ颜色空间
人类视觉系统
小波变换
鲁棒性
pseudo-random sequence
YIQ color space
human visual system
discrete wavelet transform
robustness
