1. Institute for Separation and Process Technology, Clausthal University of Technology, Leibnizstr. 15, 38678 Clausthal-Zellerfeld, Germany
2. Department of Embedded Intelligent Systems, Fraunhofer Institute for Optronics, Systems Engineering and Image Exploitation IOSB, Am Vogelherd 90, 98693 Ilmenau, Germany
3. Faculty of Electrical Engineering, Schmalkalden University of Applied Sciences, Blechhammer 9, 98574 Schmalkalden, Germany
4. Department for Agricultural Sciences, Georg-August-University Göttingen, Gutenbergstraße 33, 37075 Göttingen, Germany