Contrôle dans la génération de formes naturelles

Houssam Hnaidi 1
1 GeoMod - Modélisation Géométrique, Géométrie Algorithmique, Fractales
LIRIS - Laboratoire d'InfoRmatique en Image et Systèmes d'information
Abstract : The generation of natural shapes has been the subject of much research for many years. Several methods have been proposed to generate realistic natural objects such as terrain, plants and trees, clouds, etc... Iterative models are well known in this field of research due to their ability to generate complex and rough shapes that are adapted to the representation of natural objects. The major drawback of such models is the lack of control over the final result. The latter can come from the stochastic construction method which prevents any control by definition. For models whose construction is deterministic, the parameters of generation are often non-intuitive and thus limit control. For these reasons many studieshave focused on the problem of controlling these models as well as the possibility of using non-iterative models (sketches, based on examples, etc). Often, control introduced by these models is a global control, on the whole final object and therefore does not include local details of this object. In our work, we focus in the problem of control over natural shapes, taking into account local control. To this end, we introduce two different models. The first is based on an iterative formalism with detail concept which is divided into two subfamilies, one based on IFS and the other one based on subdivisionsurfaces. The second model allows the editing of terrain features under a form of vectorial primitives which one used to generate the terrain by guided diffusion method. The latter is the subject of a parallel implementation on graphics card (GPU).
Document type :
Preprints, Working Papers, ...
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01458086
Contributor : Équipe Gestionnaire Des Publications Si Liris <>
Submitted on : Monday, February 6, 2017 - 4:44:45 PM
Last modification on : Thursday, November 1, 2018 - 1:19:52 AM

Identifiers

  • HAL Id : hal-01458086, version 1

Citation

Houssam Hnaidi. Contrôle dans la génération de formes naturelles. 2010. ⟨hal-01458086⟩

Share

Metrics

Record views

92