Our owncontributions are presented in chapter four. We presented a new idea about digital watermarking that it is called a combining watermarking in frequency domain for static image.
在第四章中我们提出了一种新的水印方案：多分辨率复合数字水印方案，复合水印方案结合了在图像高频部分和低频部分分别嵌入不同水印的优点，水印嵌入时在如何划分图像的低频和高频部分提出了根据图像能量分布特征来确定划分点的思想。
参考来源 - 多级小波分解的复合数字水印技术·2,447,543篇论文数据，部分数据来源于NoteExpress
在学习和分析了已有的水印算法后，我们将重点放在研究复合水印嵌入技术的实现上。
After studying and analyzing the disadvantages of the previous algorithms in digital watermarking, we focus our work on the researching and implementation of the combining watermarking technology.
提出一种同时嵌入鲁棒性水印和易损性水印的复合型数字水印算法。
Embedding robust watermark and fragile watermark in one image simultaneously, an algorithm of compound, adaptive digital watermarking was presented.
提出了一种改进的复合型水印嵌入方法，引入了通信中的纠错编码技术，在很大程度上增强了鲁棒水印的鲁棒性。
Then error correction coding method is presented and discussed in detail to overcome the disadvantage, so the performance of the communication system is greatly improved.
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