基于非均匀B样条小波的图像水印算法

提出了一种基于非均匀B样条小波变换的数字水印嵌入与提取算法,并通过实验分析了其鲁棒性。由于利用非均匀B样条小波对图像进行分解可以得到小于原图的任意大小的低分辨子图,因而利用方法可以方便地嵌入小于载体图像的任意大小的二值水印,并可以盲提取。实验结果表明,该算法具有较强的抗各种常见攻击的鲁棒性。

Digital image watermarking algorithm based on non-uniform B-spline wavelets transformation

An algorithm for embedding and extracting watermark into digital images based on non-uniform B-spline wavelet transformation is presented,and the robustness is discussed by experiment.Because low resolution sub-image of arbitrary size that is smaller than original image can be acquired by non-uniform B-spline wavelet decomposition,any binary watermark image which is smaller than carrier one can be embedded conveniently,and can be extracted blindly.Experiments show that the algorithm is robust against common attacks.