随着数字化多媒体信息的广泛应用，数字媒体的信息安全、版权认证问题日益突出。近年来，为有力打击盗版和保护数字产品的版权，数字水印技术在多媒体认证上的应用得到很大的推广。本代码用MATLAB进行水印的生成与提取。-With the extensive application of digital multimedia information, digital media, information security, copyright authentication issues have become increasingly prominent. In recent years, in order to effectively crack down on piracy and copyright protection of digital products, digital watermarking technology in the multimedia certification has been greatly promoted. This code is generated using MATLAB and watermark extraction.