Using DCT Features for Printing Technique and Copy Detection

Christian Schulze, Marco Schreyer, Armin Stahl, Thomas Breuel
In: Gilbert Peterson, Sujeet Shenoi (eds.) Advances in Digital Forensics V volume 306, IFIP Advances in Information and Communication Technology, Pages 95-106, Springer, Boston, 2009


The ability to discriminate between original documents and their photocopies poses a problem when conducting automated forensic examinations of large numbers of confiscated documents. This paper describes a novel frequency domain approach for printing technique and copy detection of scanned document images. Tests using a dataset consisting of 49 laser-printed, 14 inkjet-printed and 46 photocopied documents demonstrate that the approach outperforms existing spatial domain methods for image resolutions exceeding 200 dpi. An increase in classification accuracy of approximately 5% is achieved for low scan resolutions of 300 dpi and 400 dpi. In addition, the approach has the advantage of increased processing speed.



@inbook{ SCHU2009,
	Title = {Using DCT Features for Printing Technique and Copy Detection},
	Author = {Christian Schulze and Marco Schreyer and Armin Stahl and Thomas Breuel},
	Editor = {Gilbert Peterson, Sujeet Shenoi},
	BookTitle = {Advances in Digital Forensics V},
	Year = {2009},
	Series = {IFIP Advances in Information and Communication Technology},
	Publisher = {Springer},
	Publisher = {306},
	Pages = {95-106}

Last modified:: 30.08.2016