UNIZA @ Mediaeval 2014 Visual Privacy Task: Object Transparency Approach

This paper describes our approach for the Visual Privacy Task (VPT) of the MediaEval 2014. Video privacy filtering based on privacy-sensitive-object transparency is proposed. The background (hidden behind the object) is estimated by median filtering over time sequence of pixel values. We focus only on the areas labeled as high privacy sensitive (i.e. face). Low and medium privacy areas were rather untouched to keep the most of information about person activities. Despite of simplicity of the proposed method it gives promising performance. The performance is at or slightly above the average among the VPT participants.