Image-adaptive public watermarking technique based on DWT
基于小波变换的图像自适应公开水印技术

A robust image-adaptive public watermarking technique based on discrete wavelet transform(DWT) was proposed in this paper.By taking full advantage of the masking characteristics of the human visual system(HVS),a binary watermark was embedded into the host image by modifying different wavelet subbands coefficients that were corresponded.The blind watermark was realized as the original image don't be needed when extracting watermark.Modifying some parameters could get a best point.The experimental results show that the proposed algorithm provides higher embedding capacity and robust to common image processing operations and geometric distortions.So a conclusion can be made that the proposed technique is practical.