Digital image encoding scheme using fractal approach

Image encoding algorithm is a state of art of information hiding using any image as shield. In this paper concept of steganography algorithm and various terms related are defined. The efficiency of the steganography algorithm is improved by using a novel fractal technique. Fractals are self-similar complex image and created by applying a set of affine transformation on image iteratively. In this paper, we propose to exploit the self-similarity present an image to determine the fractal regions. Location of the fractals region present in an image is used to hide information in that region. Proposed algorithm results into good quality coded image and visually it looks exactly like the cover image. This allows the user to hide information without letting the other unauthorized user realize that the image contains a secret message. In this paper, effectiveness of steganography algorithm is analyzed using the fractal technique on various types of images. Further proposed algorithm shows the effect of message size on the quality of coded image.