Authors: S. Uma Maheswari; D. Jude Hemanth
Addresses: Department of ECE, Karunya University, Coimbatore, India ' Department of ECE, Karunya University, Coimbatore, India
Abstract: Steganography is the art of hiding high sensitive information in digital image, text, video or audio. In this paper, we propose a frequency domain steganography method operating in the discrete ripplet transform (DRT). We engage the advantage of ripplet transform, which represent the image at different scales and different directions and in additional to this, it efficiently represents the images with edges. In this method, the most significant coefficients of DRT are selected to embed the secret data. The proposed method has the following advantages: a) imperceptibility of the stego image is increased because the secret data is hidden in the most significant coefficients; b) we employ the scrambling method to enhance the security. The experimental result demonstrates that peak signal-to-noise (PSNR) ratio of stego image generated by this method versus the cover image is guaranteed to be average of 47.56 dB. PSNR is much higher than that of all data hiding techniques reported in the literature.
Keywords: steganography; data hiding; information security; discrete ripplet transform; DRT; QR codes; imaging systems; frequency domain; stego images; peak SNR; signal-to-noise ratio; PSNR.
International Journal of Reasoning-based Intelligent Systems, 2015 Vol.7 No.1/2, pp.130 - 135
Received: 03 Feb 2015
Accepted: 29 Mar 2015
Published online: 31 Jul 2015 *