Color Image Watermarking Using Local Quaternion Fourier Spectral Analysis


We propose a watermarking scheme for color images based on local quaternion Fourier spectral analysis (LQFSA).The merits of the proposed scheme include: 1) Quaternion Fourier transform is defined in a 4D vector space and thus provides a larger embedding scope for watermark than conventional monochannel transformation techniques. 2) We improve the imperceptibility of watermark with regard to human color vision properties through LQFSA. 3) We introduce invariant feature transform (IFT) and geometric correction scheme so as to enhance the robustness to extensive attacks, which is another essential factor to evaluate a watermarking scheme. 4) We adopt the nearestneighborhood search to ensure the correctness of watermark extraction. Extensive experiments on the Stirmark platform validate the aforementioned merits.

2008 IEEE International Conference on Multimedia and Expo
Li Song
Li Song
Professor, IEEE Senior Member

Professor, Doctoral Supervisor, the Deputy Director of the Institute of Image Communication and Network Engineering of Shanghai Jiao Tong University, the Double-Appointed Professor of the Institute of Artificial Intelligence and the Collaborative Innovation Center of Future Media Network, the Deputy Secretary-General of the China Video User Experience Alliance and head of the standards group.