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Journal of Mathematical Imaging and Vision

, Volume 30, Issue 1, pp 13–21 | Cite as

Phase Watermarking Algorithm using Hybrid Multi-Polarity Hadamard Transform

  • Bogdan J. Falkowski
Article

Abstract

In this paper, a robust phase watermarking algorithm for still images is presented where the watermark information is conveyed in the phase spectrum in the transform domain. Phase watermarking algorithm that uses multi-polarity Walsh-Hadamard and Complex Hadamard transform is developed. The robustness of presented algorithm is investigated by its uniqueness, JPEG encoding, image resizing, dithering noise distortions, sharpening, cropping and successive watermarking.

Keywords

Unified complex Hadamard transform Multi-polarity complex Hadamard transform Multi-polarity Walsh-Hadamard transform Phase watermarking Spectral techniques 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.School of Electrical & Electronic EngineeringNanyang Technological UniversitySingaporeSingapore

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