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Using DCT Features for Printing Technique and Copy Detection

Christian Schulze, Marco Schreyer, Armin Stahl, Thomas Breuel

Advances in Digital Forensics V , Vol: 306 , 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.

Show BibTex:

@inbook {
       abstract = {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.},
       number = {}, 
       month = {}, 
       year = {2009}, 
       title = {Using DCT Features for Printing Technique and Copy Detection}, 
       journal = {}, 
       volume = {306}, 
       pages = {95-106}, 
       publisher = {Springer, Boston}, 
       author = {Christian Schulze, Marco Schreyer, Armin Stahl, Thomas Breuel}, 
       keywords = {Printing technique and copy detection, discrete cosine transformation},
       url = {http://www.springer.com/computer/information+systems/book/978-3-642-04154-9}
}