Abstract
In this paper, we demonstrated the feasibility of embedding
unperceivable code sequence by modulating dot gains through
laser intensity modulation for halftone images. From a
communication systems point of view, a printer and a document
scanner form the physical layer of a communication channel,
where information can be hidden in halftone images and reliably
transmitted and extracted. In the proposed approach, we will
leverage our previous results in embedding unperceivable banding
signals to halftone images and develop an integrated embedding
and detection algorithm to embed and extract information with
high payload capacity. Specifically, we will characterize the
embedding capacity and detection rate associated with the
proposed algorithm. Preliminary experimental results will be
presented.
