Reversible Data Hiding on Textures Combining Patch Based and Pixel Based Sampling

Abstract: This Texture steganography is a developing area of image steganography. Data hiding in images leads to distortion in image and hence revealing its presence. In such a case it is more suitable to use texture images a cover images as distortion have less effect on texture images. New texture synthesis methods are evolving where as it is triggering the development of new data hiding algorithms using texture images. Reversible algorithms enable the recovery of sample texture from the stego texture. This texture synthesis process re-samples a small texture image in order to synthesize a new texture image with a similar local appearance and arbitrary size. Data hiding is done by incorporating pixel based and patch based sampling of textures. The patch based samples are pasted on to a plane work bench and thus offers a reference platform with reference to which the message oriented texture synthesis using pixel based samples is done. It offers three advantages: first of all reversibility of source texture which is not usually a feature of pixel based texture synthesis, secondly improved data embedding capacity to texture synthesis using patch based sampling and finally improved continuity and local appearance of output images. Keywords: Texture, texture synthesis, texture steganography, mask image.