A fast ambient occlusion method for real-time plant rendering

Jun Teng, Jaeger Marc, Bao-Gang Hu. 2007. A fast ambient occlusion method for real-time plant rendering. Journal of Computer Science and Technology, 22 (6) : 859-866.

Résumé : Global illumination effects are crucial for virtual plant rendering. Whereas real-time global illumination rendering of plants is impractical, ambient occlusion is an efficient alternative approximation. A tree model with millions of triangles is common, and the triangles can be considered as randomly distributed. The existing ambient occlusion methods fail to apply on such a type of object. In this paper, we present a new ambient occlusion method dedicated to real time plant rendering with limited user interaction. This method is a three-step ambient occlusion calculation framework which is suitable for a huge number of geometry objects distributed randomly in space. The complexity of the proposed algorithm is O(n), compared to the conventional methods with complexities of O(n2). Furthermore, parameters in this method can be easily adjusted to achieve flexible ambient occlusion effects. With this ambient occlusion calculation method, we can manipulate plant models with millions of organs, as well as geometry objects with large number of randomly distributed components with affordable time, and with perceptual quality comparable to the previous ambient occlusion methods.

Mots-clés Agrovoc : modèle mathématique, anatomie végétale, arbre, développement biologique, éclairage

Mots-clés complémentaires : Algorithme

Classification Agris : F50 - Anatomie et morphologie des plantes
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Jun Teng, Institute of Automation (CHN)
• Jaeger Marc, CIRAD-BIOS-UMR AMAP (FRA)
• Bao-Gang Hu, Institute of Automation (CHN)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/541929/)

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