一种基于Slantlet变换的盲水印嵌入算法

A Blind Watermarking Algorithm Based on Slantlet Transform

为了保护数字版权,有效抵抗各种攻击,提出一种基于Slantlet变换的盲水印嵌入算法。不同于常见的基于离散小波变换(DWT)的数字水印技术,该方案先对原始图像进行8×8分块并进行Slantlet变换,再从低频近似区域中选择一个嵌入位嵌入水印。通过计算嵌入位相邻元素的平均值,并比较每个嵌入位数值和平均值的大小关系,计算得到密钥,利用密钥实现了水印的盲检测。实验结果表明,提出的盲水印算法不但具有较好的保真度,而且对于各种几何攻击和噪声攻击具有较强的鲁棒性。

In order to protect the digital copyright and resist various attacks, a new blind watermarking Algorithm based on Slantlet transform is proposed. Unlike the common discreet wavelet transform based watermarking techniques, this scheme divides the whole image into 8 x 8 blocks, and then take every blocks with Slantlet transform, selects an embedded position of low frequency approximation region to add watermarking. By calculating the average of all the embedded position value, and comparing each embedded position value with average value, getting the key which is used to realize the blind detection. Experiments show the blind watermarking algorithm is proposed in this paper not only has good fidelity, but also has good robustness to various geometric attacks and noise attacks.