epfl pavel-korshunov-lightening

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  • Geometrical Privacy Protection Tool

    Pavel Korshunov Touradj Ebrahimi

    EPFL, Switzerland

  • Challenges Keep the balance between

    - Privacy and intelligibility- Privacy and appropriateness

    Make the protection reversible How to protect different regions?

    2

  • Reversible protection 1 Body

    silhouettes

    Warping protection

    3

  • Reversible protection 2 Faces and

    accessories

    Morphing protection

    4

    Standard face

    Face to protect

    Morphed result

    Use this face instead of the original

    Triangulation points

    Morphing parameters

    Algorithm

    Standard face

    Recovered

  • Making pleasant MorphFaces to smileysBackpackBag

    5

  • 6

  • 7

  • Evaluation results

    8

    51

    73.2

    23.6

    61.6 67.7

    40.7

    57.3 59.5

    46.3

    0102030405060708090

    100

    Privacy Intelligibility AppropriatenessCrowdsourcing Stakeholders Practitioners

  • Conclusions Privacy is high Intelligibility is OK Professional evaluators do not like it

    Who does not like a smiley?

    9