基于DCT变换的数字水印信息安全研究
Research of Digital Watermarking Information Security Based on DCT -Transform
摘要
为了有效保护多媒体信息的版权，研究利用离散余弦变换（discrete cosine transform，简称DCT）的算法对整个数字水印图像进行数字变换，将水印加载在中低频分量上以保护原多媒体信息，对数字水印图像的嵌入、提取和攻击进行鲁棒性测试，试验表明该方法不仅可以从攻击后的图像中完整提取水印，而且水印的鲁棒性及抗攻击性较好，可经受一定程度的有损信号处理和一般的数字几何变换，有较强的推广价值。
Abstract
In order to protect the copyright of the multi-media information effectively, this paper proposed a digital watermarking algorithm based on DCT- transform in an image．The watermark is embedded in the middle-frequency part of the host image to protect the original multi-media information to realize the embedded, extracted and attacked tests on the digital watermark. The simulation results show that we can remarkably extract the hiding watermark and the algorithm can achieve good robustness with common signal distortion or geometric distortion and the quality of the watermarked image is guaranteed.关键词
数字水印/离散余弦变换（DCT）/置乱序列/鲁棒性Key words
Digital Watermark/Discrete Cosine transform (DCT)/Scramble Sequence/Robust引用本文复制引用
张银娟,王永科.基于DCT变换的数字水印信息安全研究[EB/OL].(2012-04-20)[2026-04-12].http://www.paper.edu.cn/releasepaper/content/201204-300.学科分类
电子技术应用
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