Welcome to the home page of Praktische Informatik IV
Prof. Dr. Wolfgang Effelsberg (emeritus)

Research Overview

The Lehrstuhl für Praktische Informatik IV does research in the area of Multimedia Systems. For many years we concentrated on algorithms for video analysis. We were among the first groups worldwide to develop text recognition algorithms for digital videos. Another topic of research was video abstraction where the system tries to automatically derive a short summary of a longer video. We have also worked on video repurposing: We designed new algorithms that map large-screen video to very small screens (e.g., on mobile phones) without losing relevant information. And we have designed and implemented an HDR (High Dynamic Range) video system. It takes multiple photos per video frame at different shutter speeds and composes them computationally into one optimally exposed frame, in real time. In the CamMark project we are developing a simulated video camcorder that can be taylored to the properties of a real camcorder and its recording context. We also have a project analysing user emotions in video clips and text messages. In the area of games we work on the procedural (i.e., algorithmic) generation of content.

Academic Staff

The research group currently has a post-doc and two PhD candidates.


Apart from advising Master's theses we do not teach anymore.

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