2,723 research outputs found
Improved Watermarking Scheme Using Decimal Sequences
This paper presents watermarking algorithms using d-sequences so that the
peak signal to noise ratio (PSNR) is maximized and the distortion introduced in
the image due to the embedding is minimized. By exploiting the cross
correlation property of decimal sequences, the concept of embedding more than
one watermark in the same cover image is investigated.Comment: 7 pages, 10 figure
A constructive and unifying framework for zero-bit watermarking
In the watermark detection scenario, also known as zero-bit watermarking, a
watermark, carrying no hidden message, is inserted in content. The watermark
detector checks for the presence of this particular weak signal in content. The
article looks at this problem from a classical detection theory point of view,
but with side information enabled at the embedding side. This means that the
watermark signal is a function of the host content. Our study is twofold. The
first step is to design the best embedding function for a given detection
function, and the best detection function for a given embedding function. This
yields two conditions, which are mixed into one `fundamental' partial
differential equation. It appears that many famous watermarking schemes are
indeed solution to this `fundamental' equation. This study thus gives birth to
a constructive framework unifying solutions, so far perceived as very
different.Comment: submitted to IEEE Trans. on Information Forensics and Securit
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