Digital images are generated by different sensors, understanding which kind of sensor has acquired a certain image could be crucial in many application scenarios where digital forensic techniques operate. In this article a new methodology which permits to establish if a digital photo has been taken by a photo-camera or has been scanned by a scanner is presented. The specific geometrical features of the sensor pattern noise introduced by the sensor are investigated by resorting to a DFT (Discrete Fourier Transform) analysis and consequently the origin of the digital content is assessed. Experimental results are provided to witness the reliability of the proposed technique.
A DFT-Based Analysis to Discern Between Camera and Scanned Images / Amerini, Irene; Caldelli, Roberto; Picchioni, Francesco. - In: INTERNATIONAL JOURNAL OF DIGITAL CRIME AND FORENSICS. - ISSN 1941-6210. - 2:1(2010), pp. 21-29. [10.4018/jdcf.2010010102]
A DFT-Based Analysis to Discern Between Camera and Scanned Images
AMERINI, IRENE
;
2010
Abstract
Digital images are generated by different sensors, understanding which kind of sensor has acquired a certain image could be crucial in many application scenarios where digital forensic techniques operate. In this article a new methodology which permits to establish if a digital photo has been taken by a photo-camera or has been scanned by a scanner is presented. The specific geometrical features of the sensor pattern noise introduced by the sensor are investigated by resorting to a DFT (Discrete Fourier Transform) analysis and consequently the origin of the digital content is assessed. Experimental results are provided to witness the reliability of the proposed technique.File | Dimensione | Formato | |
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