| Duplicating unique works of art, archaeological findings or work pieces for the industrial mass production are usually applications for 3D scanners. A manual scanning procedure can be time-consuming, especially for large or complex objects with many small and important surface features. To assure that all areas of the object are captured within a partial scan, a fast preview method is desirable, which assists the user to control and evaluate the scanning process and the results.
This section introduces a new approach for the fast visualization and evaluation of large point clouds derived from different structured light 3D scanners. By using information derived from the underlying measuring principle, regular quadrilateral grids are nearly computed in real-time. These grids are additionally used for partial NURBS approximations. Based on the derived parameterized surfaces, higher order properties are computed (e.g., surface curvatures).
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