摘要
文中提出了一种基于能量特性分块的小波域图像水印算法,采用JPEG2000静态图像压缩标准的变换核——Daubechies 9/7双正交小波进行小波变换,利用其三段低频小波系数之间的能量关系,将随机置乱的水印嵌入到图像中,并自适应调整嵌入强度因子。实验证明,该算法具有良好的不可见性和鲁棒性。
The image watermarking algorithm based on power characteristics block is proposed for copy protection of digital image. The image data is first converted to DWTdomain with Daubechies 9/7 used in JPGE2000, and then the low frequency coefficients are separated to blocks, Every block is separated to three, and use the power relations of the coefficients to embed the scrambled watermarking adaptively. Experimental results show the the proposed watermarking algorithm has good imperceptivity and robustness.
出处
《通信技术》
2007年第12期277-279,282,共4页
Communications Technology
基金
重庆市自然科学基金资助(基金号:CSTC
2007BB2105)
关键词
图像水印
能量特性
小波变换
自适应
置乱
image watermarking
power characteristic： discrete wavelet transform
adaptive
scramble
