A Digital Watermark Algorithm Based on Discrete Wavelet Transformation

Journal of Liaoning Petrochemical University ›› 2007, Vol. 27 ›› Issue (1): 63-66.

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A Digital Watermark Algorithm Based on Discrete Wavelet Transformation

School of Science , Liaoning University of Petroleum &Chemical Technology ,Fushun Liaoning 113001 , P. R. China

Received:2006-10-10 Published:2007-03-20 Online:2017-07-05

基于小波变换的数字水印算法

姜凤利

辽宁石油化工大学理学院, 辽宁抚顺113001

作者简介:姜凤利(1980 —), 男, 辽宁大连市, 硕士。

Abstract

Abstract:

　In order to ensure the concealment and robustness of watermark, a dig ital image watermark algorithm based on DWT was proposed . Firstly , the watermark was encrypted by Arnold scratch and Logistic chaotic system in order to enhance the security of watermark system. And then comparing HVS , transforming coefficients of DWT were elected , and watermark was embedded by changing transforming coefficients. The experiment results show that the algorithm has a good robustness for some image processing operations such as clipping , median filtering , noise , and JPEG compression.

Key words: Digital watermark , , Chaotic sequences, , Wavelet transformation, , Secret key

摘要： 　为保证水印的不可见性和鲁棒性, 提出了一种有效的基于水印DWT 的数字图像水印算法。该算法首先利用Arnold 置乱和Logistic 混沌系统对水印进行加密, 增强水印系统的安全性。然后结合人类视觉系统选取DWT 变换系数, 并通过对系数的改变实现水印的嵌入。实验结果表明, 该算法对剪切、中值滤波、噪声、JPEG 压缩等操作具有较强的鲁棒性。

关键词: 数字水印, 　混沌序列, 　小波变换, 　密钥

JIANG Feng - li. A Digital Watermark Algorithm Based on Discrete Wavelet Transformation[J]. Journal of Liaoning Petrochemical University, 2007, 27(1): 63-66.

姜凤利. 基于小波变换的数字水印算法[J]. 辽宁石油化工大学学报, 2007, 27(1): 63-66.

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A Digital Watermark Algorithm Based on Discrete Wavelet Transformation

基于小波变换的数字水印算法

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