Performance Analys
Performance Analysis of Watermarking Medical Images
A. Umaamaheshvari*,
K. Thanushkodi**
*AP/ECE/SSEC/Anna
University Regional Center/ Coimbatore, PO box 641104, Tamilnadu, INDIA
Tel: +91-94-8647-6293 E-mail: [email protected]
**Director/
ACET/Kinathukadavu, India
Abstract: Multimedia and communication technology
has paved new ways for the storage, access and distribution of medical data in
digital format. Conversely, these developments have introduced new risks for
unsuitable deployment of medical information flowing in open networks, provided
the effortlessness with which digital content can be manipulated. It is
renowned that the integrity and confidentiality of medical data is a serious
topic for ethical and legal reasons. Medical images need to be kept intact in
any condition and prior to any operation as well need to be checked for
integrity and verification. Watermarking is a budding technology that is
capable of assisting this aim. In recent times, frequency domain watermarking
algorithms have gained immense importance due to their widespread use. This
paper describes an effective frequency domain watermarking scheme for verifying
the integrity and authenticity of medical images. The proposed watermarking
scheme makes use of hybrid transform, which combined Discrete Cosine Transform
(DCT) and Discrete Wavelet Transform (DWT). Initially, the original image is
decomposed using hybrid transform. Subsequently, the watermark embedding and
extraction are performed in frequency domain using the presented scheme. The
proposed method is tested for different types of Attacks and is compared with
existing methods.
[A. Umaamaheshvari, K. Thanushkod. Performance Analysis of Watermarking Medical Images. Life Sci J2013;10(1):2653-2660] (ISSN:1097-8135). http://www.lifesciencesite.com.
Keywords: Daubechies 4 wavelet transform, Digital Watermarking, discrete cosine transform (DCT), discrete wavelet transform (DWT).
