基于可视密码的数字水印版权保护系统的设计与实现

Design and Implementation of a Copyright Protection System Based on Digital Watermarking with Visual Cryptography

摘要: 数字作品的拷贝较为容易，倘若多方拥有版权的数字作品在多用户合作之间，若其版权问题处理不当，势必会引起各种矛盾和商业纠纷等问题。设计一种结合可视密码、数字水印的图片版权保护方案，在不破坏视觉效果的前提下可以实现验证版权所有者。利用可视密码技术将版权信息图片加密为多份密码文件，用数字水印算法将其中一张密码图片以不可见水印嵌入版权图片中。还原时，采用水印提取技术提取出密码图，结合不少于权限值密码图恢复出原始版权信息图片来验证版权信息。

Abstract: It is easy to copy digital works. When the copyright of a digital work is owned by multiple parties, the copyright issue that is not handled correctly will certainly cause various conflicts and commercial disputes. In this case, the copyright protection method that uses images containing visual cryptography and digital watermarks emerges. This method can verify the copyright owner without compromising visual effects. The visual cryptography technology is used to encrypt copyright information images as multiple cryptography files. Then a password image is embedded into the copyright image as an invisible watermark by the digital watermark algorithm. To restore and verify the copyright information, the watermark extract technology is used to extract original copyright information images from cryptography images whose quantity cannot be less than the threshold.