网络与信息安全学报 ›› 2017, Vol. 3 ›› Issue (12): 54-61.doi: 10.11959/j.issn.2096-109x.2017.00219

• 学术论文 • 上一篇    下一篇

图像四叉树剖分下的自适应数字水印算法

刘文星,陈伟(),刘渊   

  1. 江南大学数字媒体学院,江苏 无锡 214122
  • 出版日期:2017-12-01 发布日期:2018-01-12
  • 作者简介:刘文星(1994-),男,重庆人,江南大学本科生,主要研究方向为图像处理。|陈伟(1986-),男,江苏宝应人,博士,江南大学副教授,主要研究方向为图像处理。|刘渊(1967-),男,江苏无锡人,江南大学教授,主要研究方向为网络安全。
  • 基金资助:
    国家自然科学基金资助项目(61602213);国家科技支撑计划基金资助项目(2015BAH54F00)

Adaptive digital watermarking algorithm under image quad-tree partition

Wen-xing LIU,Wei CHEN(),Yuan LIU   

  1. School of Digital Media,Jiangnan University,Wuxi 214122,China
  • Online:2017-12-01 Published:2018-01-12
  • Supported by:
    The National Natural Science Foundation of China(61602213);The National Science and Technology Support Program(2015BAH54F00)

摘要:

提出了一种图像四叉树矩形剖分下的自适应数字水印算法。通过对原始图像在多个尺度上进行最小二乘多项式逼近,将图像进行非均匀剖分,并以四叉树结构的形式进行表达。该四叉树结构既实现了对原始图像的逼近,同时携带了图像的纹理结构信息。通过统计各子区域上的剖分网格数目,计算不同区域上水印嵌入的强度,从而实现自适应数字水印方案。实验结果表明,该算法具有良好的透明性和顽健性。

关键词: 图像剖分, 四叉树, 最小二乘, 水印

Abstract:

An adaptive digital watermarking algorithm based on image quad-tree partition was proposed.The original image was approximated by various least square polynomial patches at multiple scales and was organized by a quad-tree structure.At the same time,this representation also reflected the texture information of image.By calculating the watermark embedding intensity in different regions,an adaptive digital watermarking scheme based on the number of the refined meshes in each region was realized.The experiment results show that this algorithm has the good imperceptibility and robustness.

Key words: image partition, quad-tree, least square, watermarking

中图分类号: 

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