Research of image-adaptive watermarking algorithm based on wavelet transform

This paper proposed an image-adaptive watermarking algorithm based on wavelet transform.At first,scrambled a digital image used as watermark.Next,decomposed the original image by discrete wavelet transform,and in accordance with the characteristics of human visual system,wavelet decomposition in the low-frequency domain,used methods which average of adjacent domain instead of single wavelet decomposition coefficients to estimate and quantitative,adaptively embedded watermarking in wavelet coefficients of low-frequency domain.At last,the simulation experimental results show that the algorithm for a variety of conventional image processing has good robustness,compare with algorithm of Shao Ya-fei,et al,it has better coordination in watermarking capacity,invisibility,robustness.