This paper presents a method designed to finely approximate ground surfaces from UAV photogrammetric point clouds by relying on statistical filters to separate vegetation from potential ground points, dividing the whole plot in similar complexity sub-plots through an optimized tilling, and filling h … Continue reading “Digital Terrain Model From UAV Photogrammetric Data”
Category: Implicit Surfaces
High Accuracy Terrain Reconstruction from Point Clouds Using Implicit Deformable Model
Few previous works have studied the modeling of forest ground surfaces from LiDAR point clouds using implicit functions. Jules et al.’s work [Jules17] is a pioneer in this area. However, by design this approach proposes over-smoothed surfaces, in particular in highly occluded areas, limiting i … Continue reading “High Accuracy Terrain Reconstruction from Point Clouds Using Implicit Deformable Model”
GPU-based Rendering of Point-based Implicit Surfaces
Implicit surface is a well-known surface representation. Geometric details of an object can be represented using less surface primitives than other representations such as polygonal meshes. In this paper, we propose a fast and a direct rendering method of SLIM (Sparse Low-degree IMplicit) surfaces u … Continue reading “GPU-based Rendering of Point-based Implicit Surfaces”
Hierarchical Approximation of Implicit Surfaces from Meshes
This paper describes an efficient method for the hierarchical approximation of implicit surfaces from polygonal meshes. A novel error function between a polygonal mesh and an implicit surface is proposed. This error function is defined so as to be scale-independent on its global behavior as well as … Continue reading “Hierarchical Approximation of Implicit Surfaces from Meshes”
Laplacian Deformation of Implicit Surfaces
In this research, a method for free-form deformation of SLIM (Sparse Low-degree IMplicit) surfaces is presented. By employing a Laplacian based mesh deformation technique, a global deformation is realized as movements of the centers of the local function supports. A graph connectivity for defining t … Continue reading “Laplacian Deformation of Implicit Surfaces”