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Auflistung nach Autor:in "Richard, David"

1 - 2 von 2
  • Konferenzbeitrag
    A coupled multitemporal UAV-based LiDAR and multispectral data approach to model dry biomass of maize
    (43. GIL-Jahrestagung, Resiliente Agri-Food-Systeme, 2023) Rettig, Robert; Storch, Marcel; Wittstruck, Lucas; Ansah, Christabel; Bald, Richard Janis; Richard, David; Trautz, Dieter; Jarmer, Thomas
    The presented approach attempts to highlight the capabilities of a data fusion approach that combines UAV LiDAR (RIEGL – miniVUX-1UAV) and multispectral data (Micasense – Altum) to assess the dry above ground biomass (AGB) for maize. The combined acquisition of both LiDAR and multispectral data not only supports estimates of AGB when fusing them, but also helps to evaluate phenological stage-specific modelling differences on the individual sensor data. A multiple linear regression was applied on the multisensorial UAV data from two appointments in 2021. The resulting R² of 0.87 and RMSE of 14.35 g/plant for AGB was then transferred to AGB in dt/ha.
  • Konferenzbeitrag
    Towards selective hoeing depending on evaporation from the soil
    (43. GIL-Jahrestagung, Resiliente Agri-Food-Systeme, 2023) Manss, Christoph; von Szadkowski, Kai; Bald, Janis; Richard, David; Scholz, Christian; König, Daniel; Ruckelshausen, Arno
    This paper presents how to generate an artificial dataset to test different hoeing rules. Therefore, images that have been obtained on two days of a field trial are analysed to infer weed and crop sizes. Then, weather data from 2021 and 2022 is gathered from open-source data for 100 synthetically generated fields. The generated dataset is then used to test hoeing rules that are conditioned to keep as much moisture in the soil as possible. The analysis with these hoeing rules indicates that much less hoeing would be applied if the proposed hoeing rules are used.