A JOINT SOURCE-CHANNEL CODING SCHEME FOR IMAGE-IN-IMAGE DATA HIDING
　

K. Solanki, O. Dabeer, B. S. Manjunath, U. Madhow, and S. Chandrasekaran
Dept. of Electrical and Computer Engineering
University of California at Santa Barbara
Santa Barbara, CA 93106
Email: {solanki, onkar, manj, madhow, shiv} @ece.ucsb.edu

Abstract

We consider the problem of hiding images in images. In addition
to the usual design constraints such as imperceptible host degrada-tion
and robustness in presence of variety of attacks, we impose the
condition that the quality of the recovered signature image should
be better if the attack is milder. We present a simple hybrid analog-digital
hiding technique for this purpose. The signature image is
compressed efficiently (using JPEG) into a sequence of bits, which
is hidden using a previously proposed digital hiding scheme. The
residual error between the original and compressed signature im-age
is then hidden using an analog hiding scheme. The results
show (perceptual as well as mean-square error) improvement as
the attack becomes milder.