Efficient Reconstruction of Nurbs Surfaces for Shape Analysis and Surface Inspection

We present a new approach for the fast visualization and evaluation of large point clouds derived from different structured light 3D-scanners. By using the underlying measuring principle, we generate regular quadrilateral meshes in nearly real-time. These meshes are additionally used for a partial NURBS approximation. Based on the derived parameterized surfaces we are able to calculate and measure higher degree surface features, e.g. curvature and its direction. Finally, we evaluate the efficiency and feasibility of our approaches at the example of a variety of different point clouds. a) b) c) Figure 1: Illustration of the generated mesh (a), together with the finally shaded model (b) and the computed Gaussian curvature on the object surface (c).