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Empirical investigation into the correlation between vignetting effect and the quality of sensor pattern noise
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Li, Chang-Tsun and Satta, R. (2012) Empirical investigation into the correlation between vignetting effect and the quality of sensor pattern noise. IET Computer Vision, Volume 6 (Number 6). pp. 560-566. doi:10.1049/iet-cvi.2012.0044 ISSN 1751-9632.
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Official URL: http://dx.doi.org/10.1049/iet-cvi.2012.0044
Abstract
The sensor pattern noise (SPN) is a unique attribute of the content of images that can facilitate identification of source digital imaging devices. Owing to its potential in forensic applications, it has drawn much attention in the digital forensic community. Although much work has been done on the applications of the SPN, investigations into its characteristics have been largely overlooked in the literature. In this study, the authors aim to fill this gap by providing insight into the characteristic dependency of the SPN quality on its location in images. They have observed that the SPN components at the image periphery are not reliable for the task of source camera identification, and tend to cause higher false-positive rates. Empirical evidence is presented in this work. The authors suspect that this location-dependent SPN quality degradation has strong connection with the so-called ‘vignetting effect’, as both exhibit the same type of location dependency. The authors recommend that when image blocks are to be used for forensic investigations, they should be taken from the image centre before SPN extraction is performed in order to reduce false-positive rate.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||
Journal or Publication Title: | IET Computer Vision | ||||
Publisher: | The Institution of Engineering and Technology | ||||
ISSN: | 1751-9632 | ||||
Official Date: | 2012 | ||||
Dates: |
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Volume: | Volume 6 | ||||
Number: | Number 6 | ||||
Page Range: | pp. 560-566 | ||||
DOI: | 10.1049/iet-cvi.2012.0044 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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