基于嵌入定位的改进RRW算法

An improvement algorithm of RRW based on the location of embedding

基于嵌入定位的改进RRW算法是通过结合嵌入点的定位,对原始鲁棒参考水印算法进行改进,使得水印更加隐蔽和安全。该算法主要先将载体图像进行3层小波变换,确定各细节子带中将要嵌入水印的小波系数,对照行扫描后的水印信号,然后按鲁棒参考水印算法进行嵌入。实验结果表明算法对常见图像处理操作、有损压缩、裁剪、挤压、像素移位等几何变换有较高的鲁棒性,且有较高的安全性、有效性和透明性。

In order to making the watermarking be more secret and safe, an improvement algorithm of robust reference watermarking is proposed on the base of the location of embedding. Firstly, the wavelet coefficients in which the watermark signal will embed of every detail-band are selected in discrete wavelet transform （DWT）. At the same time, the watermark signal is rearranged into a row scanning order. Finally, the watermark is embedded in the corresponding of the signal sequence according to the robust reference watermarking algorithm. The experimental results show that the proposed algorithm is safe, effective and robust to common image processing operations and some geometric distortions such as cropping, pinching, pixel-shift, and so on.