IDENTIFICATION OF ACQUISITION DEVICES FROM DIGITAL IMAGES

摘要

In an identification method, an analysis region in a test digital image is identified and values of a test parameter at a grid of locations in the analysis region are determined. A reference model of fixed pattern noise is associated with the test image. The reference model has an array of values of the test parameter for fixed pattern noise of a reference image acquisition device. A two or more dimensional similarity measure is calculated between the grid and at least a corresponding portion of the array.