Colored Steganography Implementation Scheme of Images using Transform Technique
T. C. Manjunath · International Journal of Computer Applications · 2010
This paper presents a conceptual view of the digital steganography & exploits the use of a host data to hide a piece of information that is hidden directly in media content, in such a way that it is imperceptible to a human observer, but easily detected by a computer. The principal advantage of this is that the content is inseparable from the hidden image. Steganography has long been a means of secure communication. Security is achieved by camouflaging the secret message. The main application of steganography includes that military application where military organizations use unobtrusive communications. The steganography means in military applications include Spread Spectrum and Meteor Scatter radio which gives various combinations of resistances to detection. Other applications include medical safety, indexing of voice mails, etc. The wavelet domain is growing up very quickly. Wavelets have been effectively utilized as a powerful tool in many diversified fields, including approximation theory, signal processing, physics, astronomy and image processing. Integer wavelet transforms that map integers to integers allow perfect reconstruction of the original image. Hence, an algorithm that embeds the message bit stream into the LSB’s of the integer wavelet coefficients of true cover image is presented. The algorithm presented here also applies a pre-processing step on the cover image to adjust saturated pixel components in order to recover the embedded message without loss. Simulation results showed the high invisibility of the model even with large message size. The simulation results presented here shows the effectiveness of the method presented.