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Estimation of crop plant density at early mixed growth stages using UAV imageryDOI: 10.1186/s13007-019-0449-1 Keywords: Object-based image analysis, Plant phenotyping, Safflower, Seedling count, Unmanned aerial vehicle Abstract: Safflower field experiment. a 2017 field experiment design and layout with ground control point (GCP) distribution; the 2018 field experiment had a similar layout, b 3DR Solo UAV with a Sony QX1 digital RGB camera attached, c GCP, and d colour targe
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