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Représentation géométrique multi-échelles de l'architecture des plantes

Frédéric Boudon 1 
1 VIRTUAL PLANTS - Modeling plant morphogenesis at different scales, from genes to phenotype
CRISAM - Inria Sophia Antipolis - Méditerranée , INRA - Institut National de la Recherche Agronomique, UMR AGAP - Amélioration génétique et adaptation des plantes méditerranéennes et tropicales
Abstract : Plant geometry is a complex object, combining geometries of numerous different organs, depending of the considered scale of analysis and variable in time and from one species to another. Because of this complexity and plasticity, modeling plants geometry become a challenging multi-disciplinary research topic for eco-physiological modeling to computer graphics. This study begins with the analysis of the various existing types of representation and generative systems of plants models. We identified two categories of approaches for modeling plant geometry : the global approaches, that consider plant as a whole and represents it by an envelop, and the modular one, where a plant is represented by all the geometric models of its components. Some recent works introduce the idea to organize plants models in different levels of details to adapt the complexity of the representation or for a better understanding of plant growth. In this context, the need for formalism has lead us to define a general multiscale geometric model of plant architecture, and to show its efficiency in different contexts. This model integrates coherently several geometric representations at different levels of details. It allows thus controlling and adapting the complexity of the representation during computations and a better understanding of the complex geometry of plants. We used this model in a « bottom-up » manner to characterize global shapes emerging from the detailed structure of a plant and consequently to study at different scale the space occupied by the plant. This model is then used in a « top-down » way to develop a model of plant growth based on a new simulation paradigm which allows specifying biological knowledges at different levels of organization. A hierarchization at different scales of the information makes an interactive and intuitive manipulation of complex plant models possible.
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Submitted on : Wednesday, January 5, 2011 - 3:06:05 PM
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  • HAL Id : tel-00552120, version 1


Frédéric Boudon. Représentation géométrique multi-échelles de l'architecture des plantes. Modélisation et simulation. Université Montpellier II - Sciences et Techniques du Languedoc, 2004. Français. ⟨tel-00552120⟩



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