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计算机工程 ›› 2009, Vol. 35 ›› Issue (11): 134-136. doi: 10.3969/j.issn.1000-3428.2009.11.045

• 安全技术 • 上一篇    下一篇

基于离散小波变换和边缘掩蔽的盲水印算法

苏庆堂,张英俐,李 涛,李洪国   

  1. (鲁东大学现代教育技术教学部,烟台 264025)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-06-05 发布日期:2009-06-05

Blind Watermark Algorithm Based on DWT and Edge Mask

SU Qing-tang, ZHANG Ying-li, LI Tao, LI Hong-guo   

  1. (Department of Modern Education Technology and Teaching, Ludong University, Yantai 264025)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-05 Published:2009-06-05

摘要: 针对图像低频区域嵌入水印后图像质量下降问题,提出一种新的基于小波变换和边缘掩蔽的盲水印算法。该算法依据人眼视觉系统的屏蔽特性和图像的部分特征决定水印的强度,利用边缘掩蔽技术决定水印在图像低频区域的嵌入和提取位置。实验结果表明,该算法实现了水印的隐形性,对常见的图像处理操作具有较强的鲁棒性。

关键词: 盲水印, 离散小波变换, 边缘掩蔽, 人眼视觉系统

Abstract: A new blind watermark algorithm based on Discrete Wavelet Transform(DWT) and edge mask is proposed to resolve the problem that the subjective image quality is degraded when watermark is embedded into low frequency area. The watermark strength is determined according to masking property in Human Visual System(HVS) and some characters of image, and the watermark location is identified by the technology of edge mask. Experimental results show that the algorithm is invisible and robust against common image processing.

Key words: blind watermark, Discrete Wavelet Transform(DWT), edge mask, Human Visual System(HVS)

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