Skip to Main content Skip to Navigation
Theses

Réalité terrain étendue : une nouvelle approche pour l'extraction de paramètres de surface biophysiques et géophysiques à l'échelle des individus

Abstract : Retrieval of land surface parameters is an essential part of life and Earth sciences activities, as they are the key to understand the complex phenomena that take place in the biosphere. This thesis proposes a new methodology for biophysical and geophysical surface para-meters analysis, that we call Extended Ground Truth, and that mix the advantages of the field ope-rations and those of remote sensing. We have especially focused our work on the benefits of low altitude remote sensing with a multi-cameras Unmanned Aerial System for vegetation dynamics mapping at subject scale. This problematic raises strong constraints on the system, as the identification of small bushes implies new type of sensors and the adaptation to the phenological cycles to improve the discrimination capacity of the sensors. Low altitude remote sensing seems a good solution in terms of resolution and operational flexibility and the technical revolution behind the spreading of civilian micro-UAV allows all the more capable and reliable tools for field operations. We therefore developed an Unmanned Aerial System with a specific payload that can lift up three digital cameras at once, allowing on demand oblique, stereoscopic or multispectral synchronous acquisitions and thus the development of new identification methods of the vegetation. Finally, we have participated in a field operation on a test site of the National Natural History Museum and confirmed the interest of our tool for vegetation dynamics mapping. This work leads to many other researches, per example in the field of biophysical parameters extraction from stereoscopic images, and other application fields like precision farming
Complete list of metadatas

Cited literature [341 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00583243
Contributor : Abes Star :  Contact
Submitted on : Wednesday, June 1, 2011 - 4:23:24 PM
Last modification on : Wednesday, February 26, 2020 - 7:06:13 PM
Long-term archiving on: : Thursday, March 30, 2017 - 11:06:20 AM

File

TH2010PEST1025_complete.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00583243, version 2

Collections

Citation

Antoine Gademer. Réalité terrain étendue : une nouvelle approche pour l'extraction de paramètres de surface biophysiques et géophysiques à l'échelle des individus. Sciences agricoles. Université Paris-Est, 2010. Français. ⟨NNT : 2010PEST1025⟩. ⟨tel-00583243v2⟩

Share

Metrics

Record views

1111

Files downloads

4702