[WM]: image watermarking using phase components of FFT

[Tan Hong <tanhong822@yahoo.com>]

Hi watermarkers,
   
  Regarding to image watermarking techniques in frequency domain using FFT, I found that there are lots of algorithms for embedding
on the magnitude coefficients of FFT, but just a few papers for the phase ones, although phase is more important than amplitude. I
know two papers using phase FFT: one was by Ruanaidh 1996 and the other using phase modulation by Alturki 2000.
   
  I wonder if any of you can recommend me other papers/algorithms that make use of the phase of FFT for image watermarking? I'd like
to discuss on this.
   
  Thanks in advance.



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