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大连91550部队,辽宁 大连,116023
收稿日期:2001-10-24,
修回日期:2002-03-11,
网络出版日期:2002-06-15,
纸质出版日期:2002-06-15
移动端阅览
李涛, 孟庆海, 徐彤. 一种改进的敏感数字水印技术[J]. 光学精密工程, 2002,(3): 253-256
LI Tao, MENG Qing-hai, XU Tong. Improved fragile watermark technique[J]. Editorial Office of Optics and Precision Engineering, 2002,(3): 253-256
首先介绍了数字水印的基本原理并对图像数字水印技术进行了总结
然后提出了一种改进的基于离散Haar小波变换和量化编码的敏感数字水印技术.针对原技术的缺陷
在改进技术中
离散Haar小波变换没有进行归一化处理;此外
对量化函数和水印嵌入公式进行了修改.理论和实验证明
这些改进使得该敏感数字水印技术可以更容易地实现
消除了原有的缺陷.最后
结合纠错编码技术提出了一种在验证水印时无需原水印信息的方法.
This paper firstly introduces the principle of watermark and summarizes the techniques of image watermark. Then an improved fragile watermark technique is presented
where Haar wavelet transform does not involve normalization
and quantization function is mended
watermark embedding equation is also improved. With these improvements
the watermark technique does work precisely. Using the error control code
fragile watermark detection can be done without original watermark.
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Stollnitz E J, DeRose T D, Salesin D H. Wavelets for Computer Graphics: A Primer, Part 1[A]. IEEE Computer Graphics and Applications[C].1995, 15 (3): 76-84.
Hwang R W.A Robust Algorithm for Information Hiding in Digital Pictures[EB/OL].http://nif.www.media.edu/Data Hiding/index.html.1999.
王新梅,肖国镇.纠错码[M]. 西安:西安电子科技大学出版社, 1991.
Bruce Schneier,吴世忠.应用密码学[M].北京:机械工业出版社,2000.
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