作者投稿和查稿 主编审稿 专家审稿 编委审稿 远程编辑

计算机工程 ›› 2009, Vol. 35 ›› Issue (9): 155-157. doi: 10.3969/j.issn.1000-3428.2009.09.054

• 安全技术 • 上一篇    下一篇

基于提升方案的harr小波变换图像水印算法

李百良,徐大诚   

  1. (苏州大学电子信息学院,苏州 215006)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-05-05 发布日期:2009-05-05

Image Watermark Algorithm for harr Wavelet Transform Based on Lifting Scheme

LI Bai-liang, XU Da-cheng   

  1. (School of Electronics & Information, Soochow University, Suzhou 215006)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-05-05 Published:2009-05-05

摘要: 提出一种基于提升方案的harr小波变换的图像水印算法。该算法将水印图像通过m序列实现图像的置乱,与经过小波变换后的载体图像的低频系数值按位进行异或得到需要的密钥,原始图像由小波反变换得到。实验结果证明,该图像水印算法对图像的旋转、压缩、噪声、滤波、剪切等攻击具有较好的鲁棒性。

关键词: 数字水印图像, m序列, 离散小波变换, 提升方案

Abstract: This paper proposes a harr wavelet transform Image watermark algorithm based on lifting scheme. In the algorithm, the watermark is performed a m-sequence transform. It generates the secret key by performing the exclusive-or operation of watermark and the low frequency coefficient of the host image after discrete wavelet transform. After inversing discrete wavelet transform, the host image is obtained. Experimental results demonstrate that the watermark algorithm has good robustness against the attacks such as rotation, image compression, noise addition, filtering, clipping and other image processing.

Key words: digital watermark image, m-sequence, Discret Wavelet Transform(DWT), lifting scheme

中图分类号: