摘要
该文利用小波变换,将图像从空域变换到小波域,结合树型结构性质选取相应的嵌入位置,并定义小波树的能量,根据小波系数的横向能量和纵向能量确定各层树上的嵌入强度,构造了一个非常实用的半脆弱水印认证算法。
Making advantage of the wavelet transform,the algorithmic changes the image from the airspace to the wavelet domain,combines the configuration of the tree model to select the corresponding embedded position,defines the energy of the wavelet tree,on the basis of the transverse and longitudinal energy to ensure the embedded intension,and constructs a very practical semi-fragile watermarking authentication arithmetic.The arithmetic includes the watermark image,carried image data pretreatment and the watermark embedding and extraction algorithm.
出处
《计算机安全》
2008年第11期28-30,共3页
Network & Computer Security
关键词
内容认证
半脆弱水印
离散小波变换
小波能量
Content Authentication
Semi-fragile Watermarking
Discrete Wavelet Transform
