Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture

Abstract In the last decade there has been an exponential growth of research activity on the identification of correlations between vegetational indices elaborated by UAV imagery and productive and vegetative parameters of the vine. However, the acquisition and analysis of spectral data require cost...

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Autores principales:	Alessandro Matese, Salvatore Filippo Di Gennaro
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1bfc1dc0b8424bfcb269950494602550
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spelling	oai:doaj.org-article:1bfc1dc0b8424bfcb2699504946025502021-12-02T14:06:11ZBeyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture10.1038/s41598-021-81652-32045-2322https://doaj.org/article/1bfc1dc0b8424bfcb2699504946025502021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81652-3https://doaj.org/toc/2045-2322Abstract In the last decade there has been an exponential growth of research activity on the identification of correlations between vegetational indices elaborated by UAV imagery and productive and vegetative parameters of the vine. However, the acquisition and analysis of spectral data require costs and skills that are often not sufficiently available. In this context, the identification of geometric indices that allow the monitoring of spatial variability with low-cost instruments, without spectral analysis know-how but based on photogrammetry techniques with high-resolution RGB cameras, becomes extremely interesting. The aim of this work was to evaluate the potential of new canopy geometry-based indices for the characterization of vegetative and productive agronomic parameters compared to traditional NDVI based on spectral response of the canopy top. Furthermore, considering grape production as a key parameter directly linked to the economic profit of farmers, this study provides a deeper analysis focused on the development of a rapid yield forecast methodology based on UAV data, evaluating both traditional linear and machine learning regressions. Among the yield assessment models, one of the best results was obtained with the canopy thickness which showed high performance with the Gaussian process regression models (R2 = 0.80), while the yield prediction average accuracy of the best ML models reached 85.95%. The final results obtained confirm the feasibility of this research as a global yield model, which provided good performance through an accurate validation step realized in different years and different vineyards.Alessandro MateseSalvatore Filippo Di GennaroNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alessandro Matese Salvatore Filippo Di Gennaro Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture
description	Abstract In the last decade there has been an exponential growth of research activity on the identification of correlations between vegetational indices elaborated by UAV imagery and productive and vegetative parameters of the vine. However, the acquisition and analysis of spectral data require costs and skills that are often not sufficiently available. In this context, the identification of geometric indices that allow the monitoring of spatial variability with low-cost instruments, without spectral analysis know-how but based on photogrammetry techniques with high-resolution RGB cameras, becomes extremely interesting. The aim of this work was to evaluate the potential of new canopy geometry-based indices for the characterization of vegetative and productive agronomic parameters compared to traditional NDVI based on spectral response of the canopy top. Furthermore, considering grape production as a key parameter directly linked to the economic profit of farmers, this study provides a deeper analysis focused on the development of a rapid yield forecast methodology based on UAV data, evaluating both traditional linear and machine learning regressions. Among the yield assessment models, one of the best results was obtained with the canopy thickness which showed high performance with the Gaussian process regression models (R2 = 0.80), while the yield prediction average accuracy of the best ML models reached 85.95%. The final results obtained confirm the feasibility of this research as a global yield model, which provided good performance through an accurate validation step realized in different years and different vineyards.
format	article
author	Alessandro Matese Salvatore Filippo Di Gennaro
author_facet	Alessandro Matese Salvatore Filippo Di Gennaro
author_sort	Alessandro Matese
title	Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture
title_short	Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture
title_full	Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture
title_fullStr	Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture
title_full_unstemmed	Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture
title_sort	beyond the traditional ndvi index as a key factor to mainstream the use of uav in precision viticulture
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1bfc1dc0b8424bfcb269950494602550
work_keys_str_mv	AT alessandromatese beyondthetraditionalndviindexasakeyfactortomainstreamtheuseofuavinprecisionviticulture AT salvatorefilippodigennaro beyondthetraditionalndviindexasakeyfactortomainstreamtheuseofuavinprecisionviticulture
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Beyond the traditional NDVI index as a key factor to mainstream the use of UAV in precision viticulture

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