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Color-decoupled photo response non-uniformity for digital image forensics
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Li, Chang-Tsun and Li, Yue. (2012) Color-decoupled photo response non-uniformity for digital image forensics. IEEE Transactions on Circuits and Systems for Video Technology, Vol.22 (No.2). pp. 260-271. ISSN 1051-8215
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Official URL: http://dx.doi.org/10.1109/TCSVT.2011.2160750
Abstract
The last few years have seen the use of photo response non-uniformity noise (PRNU), a unique fingerprint of imaging sensors, in various digital forensic applications such as source device identification, content integrity verification, and authentication. However, the use of a color filter array for capturing only one of the three color components per pixel introduces color interpolation noise, while the existing methods for extracting PRNU provide no effective means for addressing this issue. Because the artificial colors obtained through the color interpolation process are not directly acquired from the scene by physical hardware, we expect that the PRNU extracted from the physical components, which are free from interpolation noise, should be more reliable than that from the artificial channels, which carry interpolation noise. Based on this assumption we propose a couple-decoupled PRNU (CD-PRNU) extraction method, which first decomposes each color channel into four sub-images and then extracts the PRNU noise from each sub-image. The PRNU noise patterns of the sub-images are then assembled to get the CD-PRNU. This new method can prevent the interpolation noise from propagating into the physical components, thus improving the accuracy of device identification and image content integrity verification.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software |
| Divisions: | Faculty of Science > Computer Science |
| Journal or Publication Title: | IEEE Transactions on Circuits and Systems for Video Technology |
| Publisher: | IEEE |
| ISSN: | 1051-8215 |
| Date: | February 2012 |
| Volume: | Vol.22 |
| Number: | No.2 |
| Page Range: | pp. 260-271 |
| Identification Number: | 10.1109/TCSVT.2011.2160750 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/42364 |
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