Audrey Jolivot

Audrey Jolivot
Cirad - La recherche agronomique pour le développement | CIRAD · Département Scientifique Environnements et Sociétés (ES)

About

24
Publications
5,562
Reads
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283
Citations
Citations since 2016
13 Research Items
277 Citations
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20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060

Publications

Publications (24)
Chapter
Full-text available
Principles and functioning of thermal imaging Acquisition process with TIR UAV TIR images (pre-)processing Analyzing TIR images acquired by UAV Challenges and limits
Chapter
The book serves as a handbook and guideline for the application of UAV-based remote sensing. Data acquisition, processing and interpretation was explained in-depth, and was correlated by a variety of practical examples and case studies. Open Access book available at: https://www.wbg-wissenverbindet.de/shop/42282/uavs-for-the-environmental-sciences
Article
Full-text available
The availability of crop type reference datasets for satellite image classification is very limited for complex agricultural systems as observed in developing and emerging countries. Indeed, agricultural land use is very dynamic, agricultural censuses are often poorly georeferenced and crop types are difficult to interpret directly from satellite i...
Technical Report
Full-text available
Ce rapport technique a été produit sous la coordination de Camille Jahel, de l'unité de recherche Tetis du CIRAD. Le territoire des Niayes, dont est issu la plus grande partie des produits maraichers du Sénégal, fait face à une diminution du niveau de sa nappe superficielle et à une réduction des terres agricoles, notamment du fait de l’urbanisat...
Preprint
Full-text available
The availability of crop type reference datasets for satellite image classification is very limited for complex agricultural systems as observed in developing and emerging countries. Indeed, agricultural land use is very dynamic, agricultural census are often poorly georeferenced, and crop types are difficult to photo-interpret directly from satell...
Presentation
Since the Sahelian population livelihood relies mainly on agropastoral activities, accurate information on biomass productivity dynamics and the underlying drivers are needed to manage a wide range of issues such as food security. This study aims to contribute to a better understanding of these drivers in rangeland and cropland, both at the Sahel a...
Article
Les images thermiques ont de nombreuses applications dans le domaine agronomique, notamment pour informer sur la réponse des plantes au stress hydrique. La miniaturisation des caméras thermiques permet aujourd'hui de les installer sur des drones. Cependant, les caméras thermiques miniaturisées embarquées à bord de drones n'ont pas de système de con...
Article
A wide range of environmental and societal issues such as food security policy implementation requires accurate information on biomass productivity and its underlying drivers at both regional and local scales. While many studies in West Africa are conducted with coarse resolution earth observation data, few have tried to relate vegetation trends to...
Article
Full-text available
Water stress assessment can be performed by analyzing thermal images taken onboard Unmanned Aerial Vehicles (UAVs). This study focuses on the acquisition and data extraction of high-resolution UAV-sensed thermal images. The datasets obtained, through computation of spectral indices and image classification, allowed to assess the response to drought...
Article
Full-text available
Numerous agronomical applications of remote sensing have been proposed in recent years, including water stress assessment at field by thermal imagery. The miniaturization of thermal cameras allows carrying them onboard the unmanned aerial vehicles (UAVs), but these systems have no temperature control and, consequently, drifts during data acquisitio...
Book
Water stress assessment can be performed by analyzing thermal images taken onboard Unmanned Aerial Vehicles (UAVs). This study focuses on the acquisition and data extraction of high-resolution UAV-sensed thermal images. The datasets obtained, through computation of spectral indices and image classification, allowed to assess the response to drought...
Conference Paper
Full-text available
La cartographie des paysages passe généralement par la combinaison d’informations environnementales et d’informations sur les activités humaines. La qualité de la carte paysagère résultante dépend fortement de l’expertise et de la méthode utilisée, ainsi que de la qualité des données qui ont servi à son élaboration. Les séries temporelles d’images...
Article
Full-text available
Accurate cropland maps at the global and local scales are crucial for scientists, government and nongovernment agencies, farmers and other stakeholders, particularly in food-insecure regions, such as Sub-Saharan Africa. In this study, we aim to qualify the crop classes of the MODIS Land Cover Product (LCP) in Sub-Saharan Africa using FAO (Food and...
Article
The use of sensors for irrigation in orchard scheduling provides fundamental information to save water, as it integrates the various terms of the water balance: effective rainfall, irrigation efficiency, useful reserve of soil, percolation losses or capillary rises from deep layers inaccessible to the roots. In theoretical calculations (hydric bala...
Book
Full-text available
UMR AGAP - équipe AFEF - Architecture et fonctionnement des espèces fruitières(Edited by Pablo Gonzalez-de-Santos and Angela Ribeiro)
Book
The use of sensors for irrigation in orchard scheduling provides fundamental information to save water, as it integrates the various terms of the water balance: effective rainfall, irrigation efficiency, useful reserve of soil, percolation losses or capillary rises from deep layers inaccessible to the roots. In theoretical calculations (hydric bala...
Book
Precision irrigation requires frequent information on crop conditions spatial and temporal variability. Image-based remote sensing is one promising techniques for precision irrigation management. In this study, we investigated the use of broad band multispectral (visible, near infrared and thermal infrared bands) and thermal airborne imagery for th...
Book
Thermal infrared images can be used to estimate vegetation water content of the plant and thus to locally adapt (precision agriculture) and globally adjust (sustainable management of water resources) irrigation water quantities. Thermal imaging cameras using micro-bolometer sensors loaded on light aerial vehicles are suitable to produce thermal ima...

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Archived project