一种新的图像灰度数字水印嵌入算法

A New Watermarking Algorithm With Gray-Level Image Watermarks

提出了一种基于Haar小波变换的图像水印嵌入算法 ,通过利用各层小波系数间的特点 ,并通过对图像水印本身的信息选择构造了适用于所提算法的伪码水印 ,有效地增强了算法的隐蔽性与鲁棒性 ,从而即使在图像质量受到严重损害时仍能提取出足够信息 ,辨别出原图像水印的存在。

A method of embedding a gray-level digital image watermark into an image based on Haar wavelet transform is proposed in this paper. Especially, through pre-selecting of the original watermark image, we construct a kind of special sequence called pseudo-code watermark. The simulations show that the proposed techniques are successfully tolerant to improve the invisibility and robustness of the algorithm as against the traditional gray-level watermark methods.