数字水印是解决多媒体数据版权保护问题的有效手段之一 .分析了一般水印方案应该具备的条件 ,结合传统加密技术、扩频通信技术与图像处理技术提出一种新颖的图像水印方案 .对水印图像进行失真压缩及低通滤波等处理时 ,该方案产生的水印具有稳健性 ,可以直接推广到其他媒体数据上 .仿真结果证明了这种水印的有效性及稳健性 . Digital watermarking is one of the most effective methods to solve the problem of copyright protection of multimedia data.This paper analyzes the conditions that a general watermarking scheme should have, proposes a novel image watermarking scheme based on traditional encryption, spread spectrum communication and image processing technology, The watermark generated by this scheme is robust when it is processed, such as distortion compression and low-pass filtering, and can be directly extended to other media data.The simulation results prove the effectiveness and robustness of this watermark.