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Robust Image Watermarking Using Discrete Wavelet Transform

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Author(s): Dhandapani Samiappan | Krishnan Ammasi

Journal: Journal of Computer Science
ISSN 1549-3636

Volume: 7;
Issue: 1;
Start page: 1;
Date: 2011;
Original page

Keywords: Digital watermarking | robustness | Discrete Wavelet Transform (DWT) | attacks | Least Significant Bits (LSB) | copyright protection | approximation | horizontal | Human Visual System (HVS)

ABSTRACT
Problem statement: Digital Watermarking have gained popularity in recent years as a means of protecting multimedia data from illegal copying and unlawful reproduction. It is mainly used for copyright protection of multimedia data. Approach: In this study an image watermarking algorithm which is blind (do not require the presence of host image for detection) and robust is proposed. Results: The proposed watermarking scheme embeds the watermark in the Discrete Wavelet Transform (DWT) domain. The watermark is a binary logo and is embedded in the subband of the wavelet decomposition. Conclusion: This watermarking scheme is robust to several attacks like JPEG compression, rotation, Gaussian filtering, median filtering, cropping, scaling, sharpening, Gaussian noise and salt and pepper noise.
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