TUB @ MediaEval 2014 Visual Privacy Task: Reversible Scrambling on Foreground Masks
Sebastian Schmiedeke, Pascal Kelm, Lutz Goldmann, Thomas Sikora · 2014
This paper describes our participation in the Visual Privacy Task of MediaEval 2014, which aims to obscure human oc-currence in image sequences. As a result the recorded person should be unrecognisable, but if needed the obscured areas can be recovered. We use an approach which models the background and pseudo-randomly scrambles pixels within disjunct foreground areas. This technique is reversible and preserves the colour characteristic of each area. So, colour-based approaches will still be able to automatically distin-guish between differently dressed individuals. The evalua-tions of our results show that the privacy aspect got a high score in all three evaluation streams. The level of intelli-gibility and the pleasantness of our approach is below the average, since scrambling results in lower ‘aesthetic ’ images. 1.