A Blind Image Watermarking Algorithm Based on Dissymmetrical Fractional Fourier Transform
Jin Yang · Journal of Shanxi Normal University · 2006
By utilizing the character of dissymmetrical fractional fourier transform and combine the algorithm advantage of space domain and domain,it presents a blind image watermarking algorithm.Firstly the carrier image is dissymmetrical fractional fourier transformed with different order in the row and columns direction.Then with LSB algorithm,the original watermarking is embed in the lower frequency coefficient matrix of fractional fourier domain of order.The final watermarking image is obtained by inversely transforming the joint spectra.This algorithm mitigate the illogicality between the robustness and invisibility and enhance the watermarking security.Experiment results showed that this watermarking image has better performance of invisibility and anti-attack of noise.