Wavelet pave the trio travel for a secret mission - A stego vision

Abstract

Image steganography is a rapidly developing field with immense applications to offer high data security. There are two types' or rather two domains in which image steganography has been achieved, spatial and frequency domain. Spatial domain steganography focuses on embedding of the payload on the LSB bits of the pixels on the image, while frequency domain steganography focuses on the transformation of the image pixels using various transform algorithms and then embedding data in the transformed pixels. The most commonly used transform mechanism is the IWT (Integer Wavelet Transform) because of the obvious reason that it yields integer coefficients which are very easy to work with. This paper elucidates the use of Haar Integer Wavelet Transform for Constant and Adaptive number of bit embedding method. Both types are analyzed and finally the method with the highest embedding capacity with high PSNR is adjudged best. © 2012 Springer-Verlag.