In this paper, we propose a method for detecting
digital processing of video such as compositing. Our
method is based on a realistic model of charge coupled
device (CCD) sensor noise. It allows the identification
of an object that has been composited with an image.
This is accomplished through the comparison of local
characteristics of noise. These characteristics should
be constant for an image captured by one camera. However, when an element captured with a different camera
is composited with an image, the local noise characteristics of the foreign element can help us identify it.
Experimental results validate our model.