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EXPLOITING PRNU AND LINEAR PATTERNS IN FORENSIC CAMERA ATTRIBUTION UNDER COMPLEX LENS DISTORTION CORRECTION
- Citation Author(s):
- Submitted by:
- Andrea Montibeller
- Last updated:
- 31 May 2023 - 2:20pm
- Document Type:
- Presentation Slides
- Document Year:
- 2023
- Event:
- Presenters:
- Andrea Montibeller
- Paper Code:
- 1917
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More complex and ever more common lens distortion correction post-processing is seriously hampering state-of-the-art camera attribution techniques. In this paper, we show that
the two main existing techniques, namely PRNU (Photo Response Non-Uniformity)-based and linear-pattern-based, can be successfully combined to improve performance. Moreover, we introduce a novel method that is able to correctly invert adaptive distortion correction transformations by successively maximizing the peak-to-correlation energy (PCE) and the linear-pattern energy for much more reliable camera attribution. A novel validation procedure to quickly discard mismatch test images is also proposed. Finally, we show
how great reductions in running time can be achieved by using a GPU for interpolation, resampling, and PCE computation. The code is available at https://github.com/AMontiB/PSLR.