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UAV-based, high resolution, NIR-sensitive cameras offer the advantage of a detailed top-down perspective, with high-contrast images ideally suited for detecting Alternaria solani lesions. A field experiment was conducted with 8 plots housing 256 infected plants which were monitored 6 times over a 16-day period with a UAV. A modified RGB camera, sensitive to NIR, was combined with a superzoom lens to obtain ultra-high-resolution images with a spatial resolution of 0.3 mm\/px. More than 15,000 lesions were annotated with points in two full size images corresponding to 1250 cropped tiles of 256 by 256 pixels. A deep learning U-Net model was trained to predict the density of Alternaria solani lesions for every pixel. In this way, density maps were calculated to indicate disease hotspots as a guide for the farmer.<\/jats:p>","DOI":"10.3390\/rs14246232","type":"journal-article","created":{"date-parts":[[2022,12,9]],"date-time":"2022-12-09T03:23:49Z","timestamp":1670556229000},"page":"6232","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Ultra-High-Resolution UAV-Based Detection of Alternaria solani Infections in Potato Fields"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3372-2627","authenticated-orcid":false,"given":"Ruben","family":"Van De Vijver","sequence":"first","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"}]},{"given":"Koen","family":"Mertens","sequence":"additional","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1476-1356","authenticated-orcid":false,"given":"Kurt","family":"Heungens","sequence":"additional","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"}]},{"given":"David","family":"Nuyttens","sequence":"additional","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5167-4871","authenticated-orcid":false,"given":"Jana","family":"Wieme","sequence":"additional","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"},{"name":"UAV Research Centre, Ghent University, 9000 Ghent, Belgium"}]},{"given":"Wouter H.","family":"Maes","sequence":"additional","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"},{"name":"UAV Research Centre, Ghent University, 9000 Ghent, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5096-9475","authenticated-orcid":false,"given":"Jonathan","family":"Van Beek","sequence":"additional","affiliation":[{"name":"Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), 9820 Merelbeke, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7875-107X","authenticated-orcid":false,"given":"Ben","family":"Somers","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Earth and Environmental Sciences, 3001 Leuven, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5849-4301","authenticated-orcid":false,"given":"Wouter","family":"Saeys","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Biosystems, MeBioS, 3001 Leuven, Belgium"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,9]]},"reference":[{"key":"ref_1","unstructured":"FAO (2022, November 20). 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