A Robust Data Hiding Scheme for Images Using DFT

Mahalingam Ramkumar, Ali N. Akansu and A Ayd n Alatan Department of Ele tri al and Computer Engineering New Jersey Institute of Te hnology New Jersey Center for Multimedia Resear h University Heights, Newark, NJ 07102 ABSTRACT We present a data hiding s heme for still images, in whi h only the magnitude of the DFT oeÆ ients are altered to embed the hidden information bits. We begin by identifying various omponents of a typi al data hiding s heme like the de omposition used, signature design, self-noise suppression and signaling. The nal hoi e of the omponents of the proposed data hiding s heme are well tailored by utilizing theoreti al reasonings and experimental observations. Performan e results show good robustness of the data hiding s heme for both JPEG and SPIHT image ompression.