, Pointsdiscrets(b)Formesd'ondes
, Comparaison des mesures terrains avec les résultats d'estimation de la hauteur moyenne des grands arbres ayant une hauteur supérieure à 6m pour toutes les placettes en utilisant (a) le nuage des points discrets (b) les formes d'ondes, pp.4-23
les performances de la méthode d'inversion des formes d'ondes LiDAR est évalué par la comparaison du LAI moyen estimé à l'échelle de la parcelle avec la valeur de LAI déterminée par les mesures terrains avec l'outil TRAC. La Figure 4-24 montre les résultats d'estimation. En général, le LAI moyen est bien estimé avec un RMSE égal à 0.75m. De plus, notre estimation est très eu biaisée avec un Biais de l'ordre 0.012m, 2014. ,
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, L'objet de cette thèse est le développement des approches d'inversion de mesures LiDAR à l'aide d'une modélisation physique et statistique du signal dans le but d'estimer des propriétés biophysiques de cultures dominantes (blé, maïs) du Sud-Ouest de la France et d'un couvert forestier en Chine. Le travail a tout d'abord porté sur l'estimation du LAI et la hauteur des cultures par inversion de formes d'onde LiDAR à faible empreinte