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Magnetic resonance spectroscopy (MRS) is a non-invasive imaging modality for metabolite detection in different parts of the body (e.g. brain, liver, prostate, breast, kidney, skeletal muscle, and heart) for normal person as well as in various disorders. It aids in providing valuable information for both diagnosis as well as therapeutic monitoring. Though there has been tremendous progress in MRS signal...
In this paper a DCT based steganographic technique in frequency domain, termed as SADCT has been proposed for authentication of color images. The cover image transformed into the time domain using 8×8 mask in row major order using DCT resulting its corresponding frequency components. Highest frequency values are fetched from red and green components of transformed RGB matrix as watermark. Using a...
This paper presents a new steganographic technique which demonstrates the colour image authentication process in frequency domain based on the Discrete Fourier Transformation (DFT). Image authentication is done by hiding secrete message/image into the transformed frequency component of source image. The DFT is applied on sub-image block called mask of size 2 × 2 in row major order. Secrete message/image...
In this paper a DWT based frequency domain steganographic technique, termed as WTSIC has been proposed where the cover PPM image transform into the time domain through DWT, resulting four sub-image components as `Low resolution', `Horizontal orientation', `Vertical orientation' and `Diagonal orientation'. Secret message/image bits stream in varying positions are embedded in all three components and...
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