Reversible Palette Image Steganography Based on De-clustering and Predictive Coding

Steganographic technology acts as the important role which defends information security in the network. The information could be hidden in multimedia object. Even if transmitted in an unsafe channel, the information is invisible by human visual system to maintain security. This paper presents a reversible palette image steganography based on de-clustering and predictive coding. The information is embedded into the image during compression encoding. It does not only solve problems encountered in interception and theft over Internet. The proposed method reforms the drawback of distortion of other schemes. When retrieving the information from stego-image, the original image also can be recovered. The proposed method is robust and useful for keeping transmission secure.