A digital watermarking algorithm based on wavelet transformation

In order to protect the digital media's copyright,a robust watermarking algorithm based on wavelet transformation is presented in this paper.The algorithm mainly applies the basic idea of embedded zero-trees wavelet.The watermark's embedding position is determined based on the zero-trees structure.Also,the intensity of embedment is calculated.The study result demonstrates that this algorithm is robust and imperceptibility.It can resist all kinds of normal attacks,especially much more robust for the JPEG loss compression and the sharpening treatment.This study results provides some valuable references for future authentication of digital media.