NDLI: C7. A multi-level information hiding integrating wavelet-based texture analysis of block partition difference images

Content Provider	IEEE Xplore Digital Library
Author	Youssef, S.M. Elfarag, A.A. Raouf, R.
Copyright Year	2012
Description	Author affiliation: College of Engineering and Technology, Arab Academy for Science and technology (AAST), Alex, Egypt (Youssef, S.M.; Elfarag, A.A.; Raouf, R.)
Abstract	An efficient steganographic method is proposed for embedding secret messages into gray scale and RGB colored images. In this paper, a wavelet domain steganography model is adopted for hiding a large amount of data with high security, good invisibility and no loss of secret message. The information is embedded in those areas of the host image that contains high texture to reduce visibility of the embedded information in the host image. The qualified significant wavelet coefficients and their texture and sensitivity to gray value variations across different coarse scales (level 1, level 2 and level 3 wavelet decompositions) are utilized to determine the positions and the magnitudes to adaptively embed the secret message. The highly textured areas near the edges in high frequency subbands in the wavelet domain are considered. The transformed cover image is divided into number of joint non-overlapping N × N blocks in each layer (R, G, and B layers). A difference value is calculated from the values of the adjacent pixels in each block, producing the partitioned difference image (PDI). The selection of the range intervals is based on the characteristics of human vision's sensitivity to gray value variations from smoothness to contrast. The number of bits which can be embedded in each block varies and is decided by the width of the range to which the difference value of the two pixels and block histogram peak (Pk) belongs to. The embedded secret message can be extracted from the resulting stegno-image and the original cover image is reversed. The proposed model will produce a high-capacity image steganography technique with acceptable level of imperceptibility and distortion in the cover image and high level of overall security. This solution is independent of the nature of the data to be hidden and produces a stego image with minimum degradation. Experimental results show the feasibility of the proposed methods. Various statistics attacks were also conducted to collect related data to show the security of the method.
Starting Page	203
Ending Page	210
File Size	942727
Page Count	8
File Format	PDF
ISBN	9781467318846
e-ISBN	9781467318877
DOI	10.1109/NRSC.2012.6208525
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-10
Publisher Place	Egypt
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Discrete cosine transforms Security Wavelet transforms Educational institutions Frequency domain analysis Indexes wavelet transform Message hiding difference image embedding
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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