1. Department of Plant Sciences, Forschungszentrum Jülich GmbH, Institute of Bio- and Geosciences, Jülich, Germany
2. JB-Hyperspectral Devices GmbH, Düsseldorf, Germany
3. Department of Mathematics and Technology, Application Center for Machine Learning and Sensor Technology, Koblenz University of Applied Sciences, Remagen, Koblenz, Germany