Phase Watermarking Algorithm using Hybrid Multi-Polarity Hadamard Transform

Authors:
Bogdan J. Falkowski
Affiliations:
School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore, Singapore 639798
Venue:
Journal of Mathematical Imaging and Vision
Year:
2008

Citing 6
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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.