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EPANDING THE CONTENT OF AN OUTLINE using notes.pptx
Matlab reversible data hiding with optimal value transfer
1. REVERSIBLE DATA HIDING WITH OPTIMAL VALUE TRANSFER
ABSTRACT:
In reversible data hiding techniques, the values of host data are modified according to some
particular rules and the original host content can be perfectly restored after extraction of the
hidden data on receiver side. In this paper, the optimal rule of value modification under a
payload-distortion criterion is found by using an iterative procedure, and a practical reversible
data hiding scheme is proposed. The secret data, as well as the auxiliary information used for
content recovery, are carried by the differences between the original pixel-values and the
corresponding values estimated from the neighbors.
The estimation errors are modified according to the optimal value transfer rule. Also, the host
image is divided into a number of pixel subsets and the auxiliary information of a subset is
always embedded into the estimation errors in the next subset. A receiver can successfully
extract the embedded secret data and recover the original content in the subsets with an inverse
order. This way, a good reversible data hiding performance is achieved.
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