A semi-fragile watermarking algorithm for authenticating 2D engineering graphics based on log-polar transformation

Fei Peng, Re Si Guo, Chang Tsun Li, Min Long

    Research output: Book chapter/Published conference paperChapter

    Abstract

    A semi-fragile watermarking algorithm for authenticating 2D engineering graphics based on log-polar coordinates mapping is proposed. Firstly, the coordinates of vertices of entities are mapped to the log-polar coordinate system to obtain the invariance of translation, scaling and rotation. Then the watermark is embedded in the mantissa of the real-valued log-polar coordinates via bit substitution. Theoretical analysis and experimental results show that the proposed algorithm is not only robust against incidental operations such as rotation, translation and scaling, but can also detect and locate malicious attacks such as entity modification, entity addition/deletion.

    Original languageEnglish
    Title of host publicationInformation Security and Digital Forensics - First International Conference, ISDF 2009, Revised Selected Papers
    Pages11-18
    Number of pages8
    Volume41 LNICST
    DOIs
    Publication statusPublished - 2010
    Event1st International Conference on Information Security and Digital Forensics, ISDF 2009 - London, United Kingdom
    Duration: 07 Sep 200909 Sep 2009

    Publication series

    NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering
    Volume41 LNICST
    ISSN (Print)1867-8211

    Conference

    Conference1st International Conference on Information Security and Digital Forensics, ISDF 2009
    Country/TerritoryUnited Kingdom
    CityLondon
    Period07/09/0909/09/09

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