摘要
本文提出一种基于图像内容的数字水印嵌入方法及其盲检测方法。有意义的水印信息在经过水印密钥调制以后,在嵌入原图的DCT系数之前,首先要计算与原图待嵌入位置的相关性,以确定相应的嵌入强度,从而使嵌入的信息具有独特性。盲检测时只需要水印密钥和待测图像就可以恢复出嵌入的信息。使用这种方法可使水印在载体未被修改时的有效性达到100%。最后给出了部分用Matlab实现的程序。
A digital watermarking method based on image and it＇s oblivious detection is proposed in this paper. Before embedded into the lower frequency DCT coefficient of the image, the watermark obtain an arnold transform. By changing the embedding strength, the embedding information is unique. When detecting the watermark, we do not need the original image and original watermark. If the image is not modified, the validity of watermark can reach 100 %. At last a matlab program is provided.
出处
《北京广播学院学报（自然科学版）》
2005年第1期5-9,共5页
Journal of Beijing Broadcasting Institute(Science and Technology)
关键词
数字水印
DCT变换
盲检测
边信息
Digital Watermarking
DCT
Oblivious Detection
Side Information
