Abstract:A digital watermarking technology means that imperceptibly embedding a specifically signal (the watermark) into multimedia data such as image,text,video and audio by a certain proposed algorithm in order to protect multimedia data and authentication.According to the digital image watermarking technology,two embedding algorithms based on DWT and corresponsive distilling algorithms are studied.The result of the experiment shows that two embedding algorithms are effective and the first distilling algorithm can achieve better fusion performance than the other one.