Blind Watermarking Algorithm Based on Contourlet Transform

Contourlet transform is one of the multiscale and multidirection analysis methods,which can efficiently represent contours and textures in images.Blind watermarking algorithm based on Contourlet Transform is proposed.The watermark can be extracted from the watermarked image without the original image.Experimental results show the proposed algorithm has good transparency and is very robust to common image processing and geometric attacks.