Journal of Xidian University ›› 2023, Vol. 50 ›› Issue (5): 118-131.doi: 10.19665/j.issn1001-2400.20221107

• Cyberspace Security • Previous Articles     Next Articles

Double adaptive image watermarking algorithm based on regional edge features

GUO Na1(),HUANG Ying2,3(),NIU Baoning1(),LAN Fangpeng1(),NIU Zhixian1(),GAO Zhuojie1()   

  1. 1. School of Information and Computer,Taiyuan University of Technology,Taiyuan 030026,China
    2. School of Artificial Intelligence,Beijing University of Posts and Telecommunications,Beijing 100089,China
    3. Institute of Automation,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2022-10-31 Online:2023-10-20 Published:2023-11-21
  • Contact: Ying HUANG,Baoning NIU E-mail:guo_n_a@163.com;niubaoning@tyut.edu.cn;ying.huang@ia.ac.cn;lfp424@163.com;niuniurose63@163.com;gzj0512@163.com

Abstract:

Local image watermarking is a hotspot technology which embeds watermark in a partial image and can resist cropping attacks.Existing local watermarking technology locates the embedded region by the feature points,which may be offset when attacks occur.Due to the obvious difference of the pixel near edges,if the region contains many edges,the offset will lead to excessive regional pixel error and fail the watermark extraction.To solve this problem,a double adaptive image watermarking algorithm based on regional edge features is proposed.First,a method to determine the embedding region is proposed,which uses a sliding window to choose embedding regions with few edges and good hiding ability by taking image features such as the edge,texture,etc.into account.Second,a double adaptive watermark embedding scheme is proposed,which is divided into blocks,with each block embedding 1-bit watermark information by modifying the pixel value.In the first coarse-grained adaptive scheme,the function between the embedding parameter and the number of edge pixels is established through linear regression analysis,and the embedding strength is adaptively adjusted by the function to enhance the robustness of blocks containing edges.In the second fine-grained adaptive scheme,the gaussian window is used to adaptively adjust the modifications of different pixels to improve the imperceptibility of the watermark.Experiments show that the proposed algorithm can effectively enhance the robustness of the watermark at the edge,and improve its imperceptibility.

Key words: image watermark, edge feature, imperceptibility, robustness, adaptive

CLC Number: 

  • TP309.7

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