Journal of Applied Sciences ›› 2018, Vol. 36 ›› Issue (2): 393-410.doi: 10.3969/j.issn.0255-8297.2018.02.017

• Special Issue: Information Security of Multimedia Contents • Previous Articles    

Robust Watermarking of RGB Image Against Geometric Attacks

LI Jing-xuan, XIANG Shi-jun   

  1. College of Information Science and Technology, Jinan University/College of Cyber Security, Guangzhou 510632, China
  • Received:2018-01-31 Online:2018-03-31 Published:2018-03-31

Abstract:

In this paper, a robust watermarking algorithm based on RGB image is proposed for anti-geometric attacks by optimizing R, G and B channels. Firstly, the pixels in G and B channels of an image are expanded twice and three times, respectively. After that, the image is fltered by a Gaussian low-pass flter so that its mean and histogram can be used for watermark embedding. Comparing with the watermarking algorithm without pixel expanding in G and B channels, the proposed pixel-expanded algorithm shows stronger robustness. Furthermore, we embed the same number of bits into R,G and B channels for robustness testing, and the experimental results with 100 RGB images show that the strategy to expand the pixels in G and B channels is benefcial to improve the robustness of histogram-based watermarking for anti-geometric attacks.

Key words: geometric attacks, robust watermarking, RGB images, histogram

CLC Number: