一种基于可逆小波变换的盲数字水印算法

本文简要介绍了可逆小波变换的构造方法，并提出一种新的基于可逆整数小波变换的盲数字水印算法。水印的嵌入与提取都在密钥控制之下，水印的检测不需要原图的参与，从而实现盲水印。该算法运算复杂度低，不需要传统小波变换的边界延拓；大部分运算为整数运算，可同址运算，易于硬件实现。实验证明，该算法对JPEG压缩、去噪声、裁剪、对比度调节、明暗度调节、滤波等图像操作具有较强的鲁棒性。

A New Blind Watermarking Algorithm Based on Reversible Integer-to-Integer Wavelet Transform

A novel blind watermarking algorithm is proposed, which is based on the reversible integer-to-integer wavelet transform. A brief introduction to the Lifting scheme and the steps for constructing reversible integer-to-integer wavelet transform is made. Based on the Lifting scheme, the algorithm has a much lower computing complexity and a much higher computing speed. It needs less memory and easy to be implemented with hardware. It needs no boundary extension, which is necessary to the traditional wavelet transform. Both the embedding and detecting processes are under the control of keys. The algorithm remains robust as for the JPEG compression, denoising, clipping, filtering, and the contrast and luminance adjustment.