Statistical amplitude scale estimation for quantization-based watermarking

  title={Statistical amplitude scale estimation for quantization-based watermarking},
  author={Ivo D. Shterev and Reginald L. Lagendijk and Richard Heusdens},
  booktitle={Security, Steganography, and Watermarking of Multimedia Contents},
Quantization-based watermarking schemes are vulnerable to amplitude scaling. Therefore the scaling factor has to be accounted for either at the encoder, or at the decoder, prior to watermark decoding. In this paper we derive the marginal probability density model for the watermarked and attacked data, when the attack channel consists of amplitude scaling followed by additive noise. The encoder is Quantization Index Modulation with Distortion Compensation. Based on this model we obtain two… CONTINUE READING
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