a reversible data hiding method by histogram shifting in high quality medical images author: li-chin...
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A reversible data hiding method by histogram shifting in high quality medical images
Author: Li-Chin Huang, Lin-Yu Tseng, Min-Shiang HwangSource: The Journal of Systems and Software, 2013 Reporter: Min-Hao Wu
Introduction 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.)
Reversible data hiding, which is also called lossless data hiding
Reversible data hiding techniques can be classed into three groups data compression (VQ) pixel-value difference expansion (DE) histogram-based scheme
Introduction (cont.) DE is one kind of integer wavelet trans
form proposed by Tian high-capacity and low-distortion reversi
ble watermarking redundancy in digital images by expand
ing the difference between the two neigh- boring pixel pairs to achieve a high-capacity and low-distortion reversible watermarking
Introduction (cont.) Histogram shifting is another technique ap
plied in reversible watermarking schemes In 2006 Ni proposed a zero and a peak point of i
mage histogram to embed messages. In 2011 Luo proposed exploits the high correlati
on among image block pixels to produce a difference histogram and embedded secret data by a multi-level histogram shifting mechanism.
Proposed scheme Reversible data hiding in medical image
(1) well-suited for high quality medical images, (2) without salt-and-pepper, (3) applicable to medical image with smooth sur
face, (4) well-suited sparse histogram of intensity lev
els, (5) free location map, (6) ability of adjusting data embedding capacity,
PSNR and Inter-Slice PSNR.
Proposed scheme (cont.)
http://140.134.50.88/report/counter.php?arg=1782:report/data/report/2013-3-21/A%20reversible%20data%20hiding%20method%20by%20histogram%20shifting%20in%20high%20quality%20medical%20images(for%20print).pdf
Proposed scheme (cont.)
The strategy of data embedding where k is threshold and ˛ is difference value.
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