Detector polarization scheme for fragile, semi-fragile and hybrid digital watermarking

This paper introduces a detector polarization scheme in a turbo coded implementation which allows a digital watermarking technique to operate in either fragile, semi-fragile or robust modes with a single watermark embedding. A computer simulation is implemented based on the concepts developed in our previous work, where is presented a new methodology for the design and analysis of digital watermarking systems which, from an information theoretic point of view, incorporates robustness and fragility. Simulation results supports this methodology and allowed us to improve the discussion on the polarization scheme.