Sciweavers

Share
TIFS
2008

Determining Image Origin and Integrity Using Sensor Noise

8 years 11 months ago
Determining Image Origin and Integrity Using Sensor Noise
In this paper, we provide a unified framework for identifying the source digital camera from its images and for revealing digitally altered images using photo-response nonuniformity noise (PRNU), which is a unique stochastic fingerprint of imaging sensors. The PRNU is obtained using a Maximum Likelihood estimator derived from a simplified model of the sensor output. Both digital forensics tasks are then achieved by detecting the presence of sensor PRNU in specific regions of the image under investigation. The detection is formulated as a hypothesis testing problem. The statistical distribution of the optimal test statistics is obtained using a predictor of the test statistics on small image blocks. The predictor enables more accurate and meaningful estimation of probabilities of false rejection of a correct camera and missed detection of a tampered region. We also include a benchmark implementation of this framework and detailed experimental validation. The robustness of the proposed f...
Mo Chen, Jessica J. Fridrich, Miroslav Goljan, Jan
Added 15 Dec 2010
Updated 15 Dec 2010
Type Journal
Year 2008
Where TIFS
Authors Mo Chen, Jessica J. Fridrich, Miroslav Goljan, Jan Lukás
Comments (0)
books