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In this paper a DCT based gray scale image authentication technique in frequency domain, termed as AINCDCT has been proposed. The cover image transformed into the spectral domain through 2 × 2 mask in row major order using nonconventional DCT, resulting corresponding frequency components. Higher frequency components having less energy, replaced by secret bits using secret key and a hash function....
Image steganography is the art of hiding information onto the cover image. In this paper a Genetic Algorithm based color image authentication/data hiding technique through steganographic approach, in frequency domain using Discrete Fourier Transform (DFT) termed as GASFD, has been proposed. 2×2 masks are taken from the source image in row major order where DFT is used to transform original image (cover...
This paper deals with a novel steganographic technique which demonstrates the colour image authentication technique in frequency domain based on the Discrete Fourier Transform (DFT). The DFT is applied on sub-image block called mask of size 2 × 2 for frequency components of corresponding spatial component. This transforms process done from beginning to end mask in row major order of the carrier image...
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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