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EXPLOITING PRNU AND LINEAR PATTERNS IN FORENSIC CAMERA ATTRIBUTION UNDER COMPLEX LENS DISTORTION CORRECTION

Citation Author(s):
Andrea Montibeller, Fernando Pérez-González
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
Categories:
 

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.

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