On the robustness of Harris detector in image watermarking attacks

G. A. Papakostas, E. D. Tsougenis, D. E. Koulouriotis, V. D. Tourassis

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This paper investigates the misplacement issue presented on the detection of feature points by using the well-known Harris detector, under several watermarking attacks. Harris detector, as a powerful tool in finding image's points of high importance, called "interest points", has been widely used to locate specific image portions where watermarks are embedded, according to some watermarking insertion procedure. Although Harris detector constitutes a significant part of a typical feature-based watermarking process, no work dealing with its performance under certain attacks has been reported yet. This work studies the accuracy of Harris detector in finding the feature points, which define the watermarked regions of attacked images, firstly as an individual processing module and secondly as a part of a feature-based watermarking methodology. Detailed theoretical analysis followed by appropriate simulation experiments has shown that the incorporation of the Harris detector into the watermarking procedure presents misplacement issues that can lead the watermarking algorithm to unreliable results. In the way of decreasing these misplacement errors, a novel algorithm that extracts more stable interest points, with promising performance is also proposed.

Original languageEnglish
Pages (from-to)4394-4407
Number of pages14
JournalOptics Communications
Volume284
Issue number19
DOIs
Publication statusPublished - Sep 1 2011

Keywords

  • Error analysis
  • Feature-based watermarking attacks
  • Harris detector
  • Image watermarking

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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