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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

[en] MANY-TO-MANY FULLY CONVOLUTIONAL RECURRENT NETWORKS FOR MULTITEMPORAL CROP RECOGNITION USING SAR IMAGE SEQUENCES / [pt] RECONHECIMENTO DE CULTURAS AGRÍCOLAS UTILIZANDO REDES RECORRENTES A PARTIR DE SEQUÊNCIAS DE IMAGENS SAR

JORGE ANDRES CHAMORRO MARTINEZ 30 April 2020 (has links)
[pt] Este trabalho propõe e avalia arquiteturas profundas para o reconhecimento de culturas agrícolas a partir de seqüências de imagens multitemporais de sensoriamento remoto. Essas arquiteturas combinam a capacidade de modelar contexto espacial prórpia de redes totalmente convolucionais com a capacidade de modelr o contexto temporal de redes recorrentes para a previsão prever culturas agrícolas em cada data de uma seqüência de imagens multitemporais. O desempenho destes métodos é avaliado em dois conjuntos de dados públicos. Ambas as áreas apresentam alta dinâmica espaçotemporal devido ao clima tropical/subtropical e a práticas agrícolas locais, como a rotação de culturas. Nos experimentos verificou-se que as arquiteturas propostas superaram os métodos recentes baseados em redes recorrentes em termos de Overall Accuracy (OA) e F1-score médio por classe. / [en] This work proposes and evaluates deep learning architectures for multi-date agricultural crop recognition from remote sensing image sequences. These architectures combine the spatial modelling capabilities of fully convolutional networks and the sequential modelling capabilities of recurrent networks into end-to-end architectures so-called fully convolutional recurrent networks, configured to predict crop type at multiple dates from a multitemporal image sequence. Their performance is assessed over two publicly available datasets. Both datasets present highly spatio-temporal dynamics due to their tropical/sub-tropical climate and local agricultural practices such as crop rotation. The experiments indicated that the proposed architectures outperformed state of the art methods based on recurrent networks in terms of Overall Accuracy (OA) and per-class average F1 score.

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