A reversible data hiding
method by histogram shifting
in high quality medical images
Author: Li-Chin Huang, Lin-Yu
Tseng, Min-Shiang Hwang
Source: The Journal of Systems
and Software, 2013
Reporter: Min-Hao Wu
Outline
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Introduction
Proposed scheme
Experimental results
Conclusion
Introduction
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Most hospitals have already established the
electronic medical information to make
healthcare better, safer, and more efficient.
Over the Internet, digitized medical
information is very convenient to transmit
among patients, medical professionals, health
care providers, and institutes of medicine.
Data hiding plays an important role in
information security such as authentication,
fingerprinting, copy control, security, and
covert communication.
Introduction (cont.)
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Reversible data hiding, which is also
called lossless data hiding
Reversible data hiding techniques can
be classed into three groups
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data compression (VQ)
pixel-value difference expansion (DE)
histogram-based scheme
Introduction (cont.)
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DE is one kind of integer wavelet
transform proposed by Tian
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high-capacity and low-distortion reversible
watermarking
redundancy in digital images by
expanding the difference between the
two neigh- boring pixel pairs to achieve a
high-capacity and low-distortion reversible
watermarking
Introduction (cont.)
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Histogram shifting is another technique
applied in reversible watermarking schemes
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In 2006 Ni proposed a zero and a peak point of
image histogram to embed messages.
In 2011 Luo proposed exploits the high correlation
among image block pixels to produce a difference
histogram and embedded secret data by a multilevel histogram shifting mechanism.
Proposed scheme
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Reversible data hiding in medical image
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(1) well-suited for high quality medical images,
(2) without salt-and-pepper,
(3) applicable to medical image with smooth
surface,
(4) well-suited sparse histogram of intensity levels,
(5) free location map,
(6) ability of adjusting data embedding capacity,
PSNR and Inter-Slice PSNR.
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
http://140.134.50.88/report/counter.php?arg=1782:report/data/report/2013-321/A%20reversible%20data%20hiding%20method%20by%20histogram%20shifting%20in%20high%20qual
ity%20medical%20images(for%20print).pdf
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
Proposed scheme (cont.)
The strategy of data embedding where k is threshold and ˛ is difference value.
Proposed scheme (cont.)
Proposed scheme (cont.)
Experiment results
Experiment results (cont.)
Experiment results (cont.)
Conclusion
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Sign and unsign 16-bit depth high
quality medical images with dicom
format are tested on our algorithm.
well-suited for high quality medical
images and without salt-and-pepper.
the utilization rate and histogram shift
to solve underflow/overflow problem.