Reconstruction of tree crown shape from scanned data

Zhu Chao, Zhang Xiao-Peng, Jaeger Marc, Hu Bao-Gang. 2008. Reconstruction of tree crown shape from scanned data. In : Technologies for E-Learning and Digital Entertainment. Third International Conference, Edutainment 2008, Nanjing, China, June 25-27, 2008. by Pan, Z.; Zhang, X.; El Rhalibi, A.; Woo, W.; Li, Y. (Eds.). Dordrecht : Springer, 745-756. (Lecture notes in computer science, 5093) ISBN 978-3-540-69734-3 International Conference Edutainment 2008. 3, Nanjing, Chine, 25 Juin 2008/27 Juin 2008.

Résumé : Reconstruction of a real tree from scattered scanned points is a new challenge in virtual reality. Although many progresses are made on main branch structures and overall shape of a tree, reconstructions are still not satisfactory in terms of silhouette and details. We do think that 3D reconstruction of the tree crown shapes may help to constrain accurate reconstruction of complete real tree geometry. We propose here a novel approach for tree crown reconstruction based on an improvement of alpha shape modeling, where the data are points unevenly distributed in a volume rather than on a surface only. The result is an extracted silhouette mesh model, a concave closure of the input data. We suggest an appropriate scope of proper alpha values, so that the reconstruction of the silhouette mesh is a valid manifold surface. Experimental results show that our technique works well in extracting the crown shapes of real trees.

Mots-clés Agrovoc : arbre

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

Auteurs et affiliations

• Zhu Chao, Institut d'automatique (CHN)
• Zhang Xiao-Peng, Institut d'automatique (CHN)
• Jaeger Marc, CIRAD-BIOS-UMR AMAP (FRA)
• Hu Bao-Gang, Institut d'automatique (CHN)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/544861/)

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