1. Botanic Garden and Botanical Museum Berlin, Freie Universität Berlin, Königin-Luise-Str. Berlin, Germany
2. Fraunhofer-Institute of Optronics, System Technologies and Image Exploitation, Fraunhofer Str. Karlsruhe, Germany
3. Faculty I—Electrical Engineering and Information Technology, Hannover University of Applied Sciences and Arts, Ricklinger Stadtweg, Hannover, Germany