multi-resolution TIN model is an important issue in the contexts of visu-alization,virtual reality(VR),and geographic information systems(GIS).This paper proposes a new method for constructing multi-resolution TIN mod...multi-resolution TIN model is an important issue in the contexts of visu-alization,virtual reality(VR),and geographic information systems(GIS).This paper proposes a new method for constructing multi-resolution TIN models with multi-scale topographic features preservation.The proposed method is driven by a half-edge collapse operation in a greedy framework and employs a new quadric error metric to efficiently measure geometric errors.We define topographic features in a multi-scale manner using a center-surround operator on Gaussian-weighted mean curvatures.Experimental results demonstrate that the proposed method performs better than previous methods in terms of topographic features preservation,and is able to achieve multi-resolution TIN models with a higher accuracy.展开更多
基金the National Basic Research Program of China("973")(Grant No.2006CB705500)the National Natural Science Foundation of China(Grant No.40571134)+1 种基金the National Hi-Tech Research and Development Program of China(Grant Nos.2007AA12Z241,2007AA12Z212)Outstanding Scholar of Ministry of Education of China(Grant No.NCET-07-0643)
文摘multi-resolution TIN model is an important issue in the contexts of visu-alization,virtual reality(VR),and geographic information systems(GIS).This paper proposes a new method for constructing multi-resolution TIN models with multi-scale topographic features preservation.The proposed method is driven by a half-edge collapse operation in a greedy framework and employs a new quadric error metric to efficiently measure geometric errors.We define topographic features in a multi-scale manner using a center-surround operator on Gaussian-weighted mean curvatures.Experimental results demonstrate that the proposed method performs better than previous methods in terms of topographic features preservation,and is able to achieve multi-resolution TIN models with a higher accuracy.
