Title :
Image Authentication Using Distributed Source Coding
Author :
Lin, Yao-Chung ; Varodayan, David ; Girod, Bernd
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
Abstract :
We present a novel approach using distributed source coding for image authentication. The key idea is to provide a Slepian-Wolf encoded quantized image projection as authentication data. This version can be correctly decoded with the help of an authentic image as side information. Distributed source coding provides the desired robustness against legitimate variations while detecting illegitimate modification. The decoder incorporating expectation maximization algorithms can authenticate images which have undergone contrast, brightness, and affine warping adjustments. Our authentication system also offers tampering localization by using the sum-product algorithm.
Keywords :
authorisation; decoding; expectation-maximisation algorithm; image coding; source coding; Slepian-Wolf encoded quantized image projection; affine warping; authentication data; decoder; distributed source coding; expectation maximization; illegitimate modification detection; image authentication; side information; tampering localization; Authentication; Brightness; Decoding; Image coding; Image reconstruction; Source coding; Transform coding; Distributed source coding; EM algorithm; image authentication; sum-product algorithm; Algorithms; Image Enhancement; Image Interpretation, Computer-Assisted; Information Storage and Retrieval; Pattern Recognition, Automated; Reproducibility of Results; Security Measures; Sensitivity and Specificity;
Journal_Title :
Image Processing, IEEE Transactions on
DOI :
10.1109/TIP.2011.2157515
