Digital watermarking algorithms based on curvelet transform

This paper proposes a watermarking algorith m based on curvelet transform .Considering the characteristics of Human Visual System (HVS), the algorithm extract the embedding field of one image using curvelet transforms. Then the watermark is embedded the embedding field. A scheme for detect and recovering rotation attacks is applied before watermark detection. Experimental results show that our algorithm is quite robust under attacks like rotation cropping noise adding etc.