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Blind digital watermarking in PDF documents using Spread Transform Dither Modulation

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Abstract

In this paper, a blind digital watermarking scheme for Portable Document Format (PDF) documents is proposed. The proposed method is based on a variant Quantization Index Modulation (QIM) method called Spread Transform Dither Modulation (STDM). Each bit of the secret message is embedded into a group of characters, more specifically in their x-coordinate values. The method exhibits experiments of two opposite objectives: transparency and robustness, and is motivated to present an acceptable distortion value that shows sufficient robustness under high density noises attacks while preserving sufficient transparency.

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Author notes

  1. Ahmad W. Bitar

    Present address: SONDRA/CentraleSupélec, Plateau du Moulon, 3 rue Joliot-Curie, F-91190, Gif-sur-Yvette, France

Authors and Affiliations

  1. Université Antonine, Hadat-Baabda, Lebanon

    Ahmad W. Bitar & Rony Darazi

  2. Université de Franche Comté, Belfort, France

    Jean-François Couchot & Raphaël Couturier

Authors
  1. Ahmad W. Bitar
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  2. Rony Darazi
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  3. Jean-François Couchot
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  4. Raphaël Couturier
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Correspondence to Ahmad W. Bitar.

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Bitar, A.W., Darazi, R., Couchot, JF. et al. Blind digital watermarking in PDF documents using Spread Transform Dither Modulation. Multimed Tools Appl 76, 143–161 (2017). https://doi.org/10.1007/s11042-015-3034-2

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  • DOI: https://doi.org/10.1007/s11042-015-3034-2

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