Digital watermarking for still image based n discrete fractional fourier transform

摘要

Presents a digital watermarking technique based on discrete fractional Fourier transform (DFRFT), discusses the transformation of the original image by DFRFT, and the modification of DFRFT coefficients of the original image by the information of watermark, and concludes from experimental results that the proposed tech- nique is rbout to lossy compression attack.