The Binary Phase Only Filter as an Image Watermark

Abstract

We describe our new method for watermarking digital images. Our work is motivated by the study of phase only filters in Fourier optics. In this paper we concentrate on grey scale images, even though our method works for color also. We take the discrete Fourier transform of an image and determine a signature based upon a binary phase-only filter (BPOF). We replace certain frequency magnitudes with this BPOF. This serves as the basis for our watermark. We may also insert additional side information and our method prevents spoofing of the watermark. Our method survives JPEG compression so that the watermark survives to pass various correlation tests. Our watermarking scheme is used for authentication purposes.

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Document Details

Document Type
Technical Report
Publication Date
Jan 12, 2004
Accession Number
ADA465428

Entities

People

  • Farid Ahmed
  • Ira S. Moskowitz

Organizations

  • The Catholic University of America

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Authentication
  • Compression
  • Computer Simulations
  • Cryptography
  • Detection
  • Detectors
  • Discrete Fourier Transforms
  • Filters
  • Frequency
  • Frequency Domain
  • Information Operations
  • Military Research
  • Numbers
  • Pattern Recognition
  • Statistics

Fields of Study

  • Computer science

Readers

  • Cybersecurity.
  • Image Processing and Computer Vision.