Authors
Tong Qiao, Florent Retraint, Rémi Cogranne,
Title
Source Camera Device Identification Based on Raw Images
In
Proc. of IEEE International conf. on Image Processing (ICIP)
Pages
1–5
Publisher
IEEE
Year
2015
Indexed by
Abstract
This paper investigates the problem of identifying the source imag- ing device of the same model for a natural raw image. The approach is based on the Poissonian-Gaussian noise model which can accu- rately describe the distribution of the given image. This model re- lies on two parameters considered as unique fingerprint to identify source cameras of the same model. The identification is cast in the framework of hypothesis testing theory. In an ideal context where all model parameters are perfectly known, the Likelihood Ratio Test (LRT) is presented and its performance is theoretically established. The statistical performance of LRT serves as an upper bound of the detection power. For a practice use, when the image parameters are unknown and camera parameters are known, a detector based on es- timation of those parameters is designed. Numerical results on sim- ulated data and real natural raw images highlight the relevance of our proposed approach.
Affiliations
Offprint