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A Review of hybrid digital watermarking

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Author(s): Kusum Yadav #1 , Akhil Kaushik

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 7;
Start page: 3123;
Date: 2013;
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Keywords: Digital Watermarking | DWT | DCT | SVD.

ABSTRACT
With the advent of Internet, digital data has become so redundant and easily accessible across the globe, that numerous unauthorized users are taking its advantage and ripping the actual authors of the ownership over their digital content. Digital watermarking provides a way to protect the multimedia data, which is available through online resources. It facilitate in solving the problems associated with copy right protection, copy protection etc. The watermark should be robust in such a way that it is recoverable, even if a part of it is altered. There are different methods for embedding and extracting the watermark from the original image. In this paper three different methods of embedding and extracting the watermark have been discussed. The First method focuses on implementing watermarking technique through DWT(Discrete wavelet transformation) and SVD(Singular value displacement. Another methodology conferred uses the concept of superimposition using a secret key. The final scheme uses the concept of artificial neural network for digital watermarking. The comparison of above mentioned three techniques is done by considering effects of various types of attacks like cropping, rotation, filtering etc. against robustness of the watermarking approaches.

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