摘要
提出了一种基于HVS的小波域彩色图像水印算法。首先将彩色载体图像由RGB彩色空间转换为YIQ彩色空间,选取Y分量进行多级小波分解,通过修改中频系数,将水印信息分成两部分,分别嵌入到三级水平细节子带和垂直细节子带中。在系数的选择上利用了人眼的视觉特性,使得水印信息嵌入到图像中比较暗的区域。实验证明,嵌入水印后的图像具有很好的不易觉察性,并且对JPEG压缩、图像添加高斯噪声、中值滤波和对比度增强等常见图像处理操作具有很强的鲁棒性。
The scheme that embeds image data invisibly into a color image was proposed based on human visual model. The color image was transformed from YIQ color space into RGB color space, and then we select the Y part to insert the watermark. The wavelet coefficients were selected based on HVS, and then the coefficients were modified to embed the watermark. It was shown with experiments that it not only gets the transparency, but also has good robustness to JPEG compression, additive noise and filter etc.
出处
《电子测量技术》
2006年第5期63-65,95,共4页
Electronic Measurement Technology
关键词
数字水印
小波变换
色彩空间
人类视觉系统
digital waterrnarking
wavelet transform
color space
human visual system
