Robust Watermarking in Multiresolution Walsh-Hadamard Transform

Details Robust Watermarking in Multiresolution Walsh-Hadamard Transform Robust Watermarking in Multiresolution Walsh-Hadamard Transform

2009-06-24

arxiv.org/abs/0906.4415v1

Proc. of IEEE International Advance Computing Conference (IACC 2009), Patiala, India, 6-7 March 2009, pp. 894-899

Computer Science

Cryptography and Security

6 Pages, 16 Figure, 2 Tables

Scientific paper

10.1109/IADCC.2009.4809134

In this paper, a newer version of Walsh-Hadamard Transform namely multiresolution Walsh-Hadamard Transform (MR-WHT) is proposed for images. Further, a robust watermarking scheme is proposed for copyright protection using MRWHT and singular value decomposition. The core idea of the proposed scheme is to decompose an image using MR-WHT and then middle singular values of high frequency sub-band at the coarsest and the finest level are modified with the singular values of the watermark. Finally, a reliable watermark extraction scheme is developed for the extraction of the watermark from the distorted image. The experimental results show better visual imperceptibility and resiliency of the proposed scheme against intentional or un-intentional variety of attacks.

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