Digital watermarking algorithm based on phase and amplitude of DFT domain
一种基于离散傅立叶变换域相位和幅度的数字水印算法

A meaningful watermark was embedded into phase and amplitude components of block DFT of image seperately, then their robustnesses were compared under the same distortion. Combined with phase and amplitude components, a novel DFT domain watermarking algorithm was proposed. The watermark could be detected without the primitive image. Experiment results show that the algorithm is easy to realize and the watermarking is invisible, moreover, the algorithm is robust to JPEG compression, resizing, rotation, median filtering and noise perturbation.