A Secure Online Application Safeguarding Data with Stegnography based Watermarking
||International Journal of Computer Trends and Technology (IJCTT)||
|© 2014 by IJCTT Journal|
|Year of Publication : 2014|
|Authors : Swathi Voddi, Santhi Chavala, Prof.S.V.Achutha Rao|
Swathi Voddi, Santhi Chavala, Prof.S.V.Achutha Rao "A Secure Online Application Safeguarding Data with Stegnography based Watermarking". International Journal of Computer Trends and Technology (IJCTT) V18(1):21-25, Dec 2014. ISSN:2231-2803. www.ijcttjournal.org. Published by Seventh Sense Research Group.
Digital watermarking is the act of hiding information in multimedia data (images, audio or video), for the purposes of content protection or authentication. In digital watermarking, the secret information (usually in the form of a bit-stream), the watermark, is embedded into a multimedia data such as cover data in such a way that distortion of the cover data due to watermarking is almost negligible perceptually. Reversible data hiding enables the embedding of messages in a host image without any loss of host content and which is proposed for image authentication that if the watermarked image is deemed authentic so we can revert it to the exact copy of the original image before the embedding occurred. Reversible watermarking constitutes a class of fragile digital watermarking techniques that find application in authentication of medical and military imagery. In this techniques ensure that after watermark extraction and the original cover image can be recovered from the watermarked image pixel-by-pixel. We present an improved histogram-based reversible data hiding scheme based on prediction and sorting. This paper presents a novel reversible watermarking technique as an improved modification of the existing histogram bin shifting technique. And also we develop an optimal selection scheme for the “embedding point” grayscale value of the pixels hosting the watermark and take advantage of multiple zero frequency pixel values (if available) in the given image to embed the watermark. This technique improves the peak signal to noise ratio (PSNR) of the watermarked image compared to previously proposed histogram bin shifting techniques.
 Pasunuri Nagarju, Ruchira Naskar and Rajat Subhra Chakraborty “Improved Histogram Bin Shifting based Reversible Watermarking” on International Conference on Intelligent Systems and Signal Processing
 Ya-Fen Chang and Wei-Liang Tai “Histogram-based Reversible Data Hiding Based on Pixel Differences with Prediction and Sorting” on Histogram-based Reversible Data Hiding Based on Pixel Differences with Prediction and Sorting
 G.C. Langelaar, I. Setyawan, and R.L. Lagendijk “Watermarking digital image and video data,” IEEE Signal Process.
 Ruchira Naskar “Content Protection through Reversible Watermarking”.
Digital Image Watermarking, histogram bin shifting, reversible watermarking, Reversible data hiding, image authentication, lossless watermarking, data hiding, fragile watermarking.