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 ›› 2011, Vol. 37 ›› Issue (22): 107-109. doi: 10.3969/j.issn.1000-3428.2011.22.033

• 安全技术 • 上一篇    下一篇

改进的大容量可逆数字水印嵌入算法

吕林涛,张 玺   

  1. (西安理工大学计算机科学与工程学院,西安 710048)
  • 收稿日期:2011-05-04 出版日期:2011-11-18 发布日期:2011-11-20
  • 作者简介:吕林涛(1955-),男,教授,主研方向:网络与信息安全,数字水印;张 玺,硕士研究生
  • 基金资助:
    陕西省自然科学研究计划基金资助项目(2010JK740)

Improved Large Capacity Reversible Digital Watermark Embedding Algorithm

LV Lin-tao, ZHANG Xi   

  1. (Faculty of Computer Science and Engineering, Xi’an University of Technology, Xi’an 710048, China)
  • Received:2011-05-04 Online:2011-11-18 Published:2011-11-20

摘要: 针对现有的差扩算法位置图难以压缩的问题,提出一种采用奇偶不变特性、和値不变特性、差值调节和块差扩相融合的可逆水印改进嵌入算法。该算法对宿主图像实施2×2的像素分块,采用横向扫描与纵向扫描相融合的方式嵌入水印。实验结果证明,该算法提高了可逆水印的嵌入容量,仅产生1/4宿主图像大小的位置图,具有较高的实用价值。

关键词: 可逆水印, 差扩算法, 奇偶不变特性, 和值不变特性, 差值调节

Abstract: To solve the problem that the position graph which can not be best compressed in the existing difference expansion authentications, this paper proposes a reversible image embedding authentication, which combines the Reversible Watermark based on Invariability and Adjustment on Pixel Pairs(RWIAPP) and block difference expansion method together. This algorithm separates the host graph to 2×2 pixel blocks, and scans each block in both transverse dimension and vertical dimension. Experimental results show that the proposed algorithm can not only improve the reversible embedding capacity, but also produces only 1/4 host image size drawing. Therefore, this algorithm has better practical value.

Key words: reversible watermark, difference expansion algorithm, odd-even invariant feature, summation invariant feature, Pairwise Difference Adjustment(PDA)

中图分类号: