• DocumentCode
    2014432
  • Title

    Secure image databases through distributed source coding of SIFT descriptors

  • Author

    Nambiar, Athira M. ; Tagliasacchi, Marco ; Magli, Enrico

  • Author_Institution
    Inst. Super. Tecnico (IST), Lisbon, Portugal
  • fYear
    2012
  • fDate
    17-19 Sept. 2012
  • Firstpage
    130
  • Lastpage
    135
  • Abstract
    The adoption of distributed databases calls for storing data at two or more sites, in order to address application-specific requirements including, e.g., redundancy, data locality, and so on. When visual data (including images, videos and their corresponding descriptors) need to be stored, synchronization across different sites might require significant bandwidth resources. In this paper we explore the use of distributed source coding to encode local SIFT descriptors extracted from static images. The key tenet is to exploit, at the decoder side, the correlation between matching pairs of descriptors extracted, respectively, from the out-of-date and up-to-date image. Preliminary results show that a coding efficiency gain up to 1 bit/descriptor can be achieved in the case of ideal lossless coding. In the case of distributed source coding with LDPC codes, a practical average gain of 0.19 bit/descriptor is observed.
  • Keywords
    image coding; parity check codes; security of data; visual databases; LDPC codes; SIFT descriptors; application-specific requirements; data locality; distributed databases; distributed source coding; lossless coding; matching descriptor pairs; secure image databases; static images; Correlation; Decoding; Distributed databases; Encoding; Joints; Protocols; Image coding; distributed databases; multimedia databases;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Multimedia Signal Processing (MMSP), 2012 IEEE 14th International Workshop on
  • Conference_Location
    Banff, AB
  • Print_ISBN
    978-1-4673-4570-5
  • Electronic_ISBN
    978-1-4673-4571-2
  • Type

    conf

  • DOI
    10.1109/MMSP.2012.6343428
  • Filename
    6343428