caa a22 4500 445864613 CHVBK 20180317145454.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11119-010-9201-6 doi (NATIONALLICENCE)springer-10.1007/s11119-010-9201-6 Automatic identification of crop and weed species with chlorophyll fluorescence induction curves [Elektronische Daten] [Esa Tyystjärvi, Michael Nørremark, Heta Mattila, Mika Keränen, Marja Hakala-Yatkin, Carl-Otto Ottosen, Eva Rosenqvist] Automatic identification of crop and weed species is required for many precision farming practices. The use of chlorophyll fluorescence fingerprinting for identification of maize and barley among six weed species was tested. The plants were grown in outdoor pots and the fluorescence measurements were done in variable natural conditions. The measurement protocol consisted of 1s of shading followed by two short pulses of strong light (photosynthetic photon flux density 1700μmolm−2s−1) with 0.2s of darkness in between. Both illumination pulses caused the fluorescence yield to increase by 30-60% and to display a rapid fluorescence transient resembling transients obtained after long dark incubation. A neural network classifier, working on 17 features extracted from each fluorescence induction curve, correctly classified 86.7-96.1% of the curves as crop (maize or barley) or weed. Classification of individual species yielded a 50.2-80.8% rate of correct classifications. The best results were obtained if the training and test sets were measured on the same day, but good results were also obtained when the training and test sets were measured on different dates, and even if fluorescence induction curves measured from both leaf sides were mixed. The results indicate that fluorescence fingerprinting has potential for rapid field separation of crop and weed species. Springer Science+Business Media, LLC, 2010 Automatic plant species recognition nationallicence Chlorophyll a fluorescence nationallicence Fluorescence fingerprinting nationallicence Neural network nationallicence Pattern recognition nationallicence Tyystjärvi Esa Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut Nørremark Michael Department of Biosystem Engineering, Faculty of Agricultural Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark aut Mattila Heta Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut Keränen Mika Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut Hakala-Yatkin Marja Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut Ottosen Carl-Otto Institute of Horticulture, Faculty of Agricultural Sciences, Aarhus University, Kirstinebjergvej 10, 5792, Årslev, Denmark aut Rosenqvist Eva Institute of Agriculture and Ecology, Section of Crop Science, University of Copenhagen, Hojbakkegaard Allé 21, 2630, Taastrup, Denmark aut Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 546-563 1385-2256 12:4<546 2011 12 11119 https://doi.org/10.1007/s11119-010-9201-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-010-9201-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tyystjärvi Esa Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut NATIONALLICENCE 700 1- Nørremark Michael Department of Biosystem Engineering, Faculty of Agricultural Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark aut NATIONALLICENCE 700 1- Mattila Heta Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut NATIONALLICENCE 700 1- Keränen Mika Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut NATIONALLICENCE 700 1- Hakala-Yatkin Marja Molecular Plant Biology, Department of Biochemistry and Food Chemistry, University of Turku, 20014, Turku, Finland aut NATIONALLICENCE 700 1- Ottosen Carl-Otto Institute of Horticulture, Faculty of Agricultural Sciences, Aarhus University, Kirstinebjergvej 10, 5792, Årslev, Denmark aut NATIONALLICENCE 700 1- Rosenqvist Eva Institute of Agriculture and Ecology, Section of Crop Science, University of Copenhagen, Hojbakkegaard Allé 21, 2630, Taastrup, Denmark aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 546-563 1385-2256 12:4<546 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer