Fraunhofer Institute FIRST, Department IDA, Kekulèstr. 7, 12489 Berlin, Germany. Soeren.Sonnenburg@first.fraunhofer.de|Fraunhofer Institute FIRST, Department IDA, Kekulèstr. 7, 12489 Berlin, Germany. Soeren.Sonnenburg@first.fraunhofer.de|Fraunhofer Institute FIRST, Department IDA, Kekulèstr. 7, 12489 Berlin, Germany. Soeren.Sonnenburg@first.fraunhofer.de|Fraunhofer Institute FIRST, Department IDA, Kekulèstr. 7, 12489 Berlin, Germany. Soeren.Sonnenburg@first.fraunhofer.de