目 录
1 课程设计目的..........................................................................................................1
2 课程设计要求..........................................................................................................2
3 数字水印技术基本原理..........................................................................................3
3.1 数字水印基本框架........................................................................................3
3.2 算法分类........................................................................................................3
3.2.1 DCT 法.................................................................................................4
3.2.2 其他方法..............................................................................................4
3.3 实际需要考虑的问题....................................................................................4
3.3.1 不可见性..............................................................................................4
3.3.2 鲁棒性..................................................................................................5
3.3.3 水印容量..............................................................................................5
3.3.4 安全性..................................................................................................5
4 基于 DCT 变换仿真................................................................................................6
4.1 算法原理........................................................................................................6
4.1.1 准备工作..............................................................................................6
4.1.2 选取 8*8 变换块..................................................................................7
4.1.3 边界自适应..........................................................................................7
4.1.4 DCT 变换与嵌入.................................................................................7
4.1.5 恢复空域..............................................................................................8
4.2 嵌入算法扩展................................................................................................8
4.2.1 RGB 彩色图像三个矩阵的划分.........................................................8
4.2.2 八色彩色水印......................................................................................8
4.3 水印的提取....................................................................................................9
4.4 仿真程序........................................................................................................9
5 结果分析................................................................................................................14
结束语..........................................................................................................................16
参考文献......................................................................................................................17
