By Chenglong Chen, Jiangqun Ni, Rongbin Huang, Jiwu Huang (auth.), Matthias Kirchner, Dipak Ghosal (eds.)
This publication includes the completely refereed post-conference lawsuits of the 14th details Hiding convention, IH 2012, held in Berkeley, CA, united states, in may perhaps 2012. The 18 revised complete papers provided have been conscientiously reviewed and chosen from quite a few submissions. The papers are geared up in topical sections on multimedia forensics and counter-forensics, steganalysis, information hiding in strange content material, steganography, covert channels, anonymity and privateness, watermarking, and fingerprinting.
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Additional info for Information Hiding: 14th International Conference, IH 2012, Berkeley, CA, USA, May 15-18, 2012, Revised Selected Papers
Image Proc. (2005) 4. : Self-similarity driven color demosaicking. IEEE Trans. on Image Processing 18(6), 1192–1202 (2009) 5. : Accurate detection of demosaicing regularity for digital image forensics. IEEE Trans. on Information Forensics and Security 4(4), 899–910 (2009) 6. : Synthesis of color ﬁlter array pattern in digital images. In: Proc. of SPIE-IS&T Electronic Imaging: Media Forensics and Security (2009) 7. : Counter-Forensics: Attacking Image Forensics. In: Digital Image Forensics. Springer (2012) 8.
The PSNR with respect to this reference image is taken as the quality metric Q(·), and C(·) comes from the identiﬁcation conﬁdence of the gradientbased algorithm reported by the 8-class pSVM. Since it is not always feasible to represent Q(Ip ) and C(Ip ) in a closed form, solving for the perturbation parameters θ1 and θ2 is a challenging optimization task. In this paper, we take a Monte-Carlo approach that applies Option 3 in Sec. 1 multiple times to perturb the image, and keep the result that satisﬁes the constraint on C(Ip ) with highest Q(Ip ).
D1 ). that for natural images Cd ≈ C−d and Cd ≈ C← d Symmetrization by sign means merging the bins Cd +C−d , while symmetrization −. by direction requires merging Cd + C← d For example, for T = 2 and m = 4, which are the parameters solely used in this paper, the original co-occurrence matrix, Cd , with (2 × 2 + 1)4 = 625 elements is reduced to 325 elements using the directional symmetry or 338 elements using the sign symmetry. When both symmetrizations are applied, the dimension is reduced to 169.
Information Hiding: 14th International Conference, IH 2012, Berkeley, CA, USA, May 15-18, 2012, Revised Selected Papers by Chenglong Chen, Jiangqun Ni, Rongbin Huang, Jiwu Huang (auth.), Matthias Kirchner, Dipak Ghosal (eds.)