Abstract: Distinguishing the kind of sensor which has acquired a digital image could be crucial in many scenarios where digital forensic techniques are called to give answers. In this paper a new methodology which permits to determine if a digital photo has been taken by a camera or has been scanned by a scanner is proposed. Such a technique exploits the specific geometrical features of the sensor pattern noise introduced by the sensor in both cases and by resorting to a frequency analysis can infer if a periodicity is present and consequently which is the origin of the digital content. Experimental results are presented to support the theoretical framework.

  publisher    = {Springer Verlag},
  author       = {Roberto Caldelli and Irene Amerini and Francesco Picchioni},
  url          = {http://www.springerlink.com/content/p8vk1252l5t07012/},
  series       = {Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering},
  volume       = {8},
  year         = {2009},
  editor       = {Matthew Sorell},
  address      = {Berlin, Heidelberg},
  title        = {Distinguishing between camera and scanned images by means of frequency analysis},
  booktitle    = {Forensics in Telecommunications, Information and Multimedia, Second International Conference, e-Forensics 2009, Adelaide, Australia, January 19--21, 2009, Revised Selected Papers},