METHOD AND APPARATUS FOR IDENTIFYING AN IMAGING DEVICE

摘要

Techniques for identifying whether an image is derived from a camera or imaging device, and/or from which camera, or imaging device, an image derives are provided. The imaging device's reference noise pattern, a unique stochastic characteristic of all common digital imaging sensors, including CCD, CMOS (Foveon X3), and JFET is analyzed. The measured or inferred noise pattern of two images may be extracted and then cross correlated, with a high correlation being consistent with a common imager. Various preprocessing techniques may be used to improve tolerance to various types of image transform. It is also possible to perform the analysis without explicit separation of inferred image and inferred noise.