Adaptive digital watermarking algorithm
一种新颖的自适应水印算法

Currently,there are many DWT(Discrete Wavelet Transform) based watermarking algorithms,but few of them discuss the issue in association with fractal image coding in wavelet domain.A new algorithm proposed by us can adaptively select locality to insert digital watermark to get better quality for image with watermarking and enhance the security of watermarking system,according to the characteristics of HVS(Human Visual System) and fractal image coding error.This algorithm performs well especially in low-resolution picture.The experimental results show that the algorithm makes watermark better invisible and robust,and keeps lower positive error ratio as well.