Open Access Open Access  Restricted Access Subscription or Fee Access

A Hybrid Transform for Robustness Enhancement of Watermarking of Medical Images

J. Samuel Manoharan, Kezi Selva Vijila

Abstract


Medical Images are an important class of Images especially in the case of Data Hiding, Watermarking. Numerous techniques are being contributed by researchers all over with increasing technological advancements and also threat of data tampering, trespassing and destruction of evidences. Since, Robustness is one of the important criteria for any robust watermarking methods, especially with medical images, we have made a humble effort to utilize various features of a hybrid transform comprising of Contourlet transform, the Singular Value Decomposition and Discrete Cosine Transform. The Watermarked Image has been tested against a number of aggressive Image processing operations resembling the attacks which might be Intentional or Unintentional and evaluation made in terms of two parameters namely the Peak signal to noise ratio (PSNR) and Correlation Coefficient (CC).

Full Text: PDF


Disclaimer/Regarding indexing issue:

We have provided the online access of all issues and papers to the indexing agencies (as given on journal web site). It’s depend on indexing agencies when, how and what manner they can index or not. Hence, we like to inform that on the basis of earlier indexing, we can’t predict the today or future indexing policy of third party (i.e. indexing agencies) as they have right to discontinue any journal at any time without prior information to the journal. So, please neither sends any question nor expects any answer from us on the behalf of third party i.e. indexing agencies.Hence, we will not issue any certificate or letter for indexing issue. Our role is just to provide the online access to them. So we do properly this and one can visit indexing agencies website to get the authentic information.