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Research projects

3D object modeling applications

Timothée Jost

Keywords

Reverse engineering, 3D modeling, CAD model

Purpose of the project

From previous projects, expertise is available for object modeling from 3D scans. The goal of this project is to assess the quality of the modeling capabilities in various domains of application. Specifically, following application domains were investigated:

• museography

• water turbine

• CAD reverse engineering

Fig. 1 Reverse engineered watch case

Reverse engineering

Two approaches are compared:

• in the functional modeling approach, the measured data points are used as input in a CAD environement that provides an object surface representation in the form of a set of patches (NURBS)

• in the raw numerical approach, the measured points are used as is for the surface description

With the goal to provide such a comparisons, a watch case was measured with a structured light scanner build around the MiniLine device. The measurements were then used for the fabrication of a new set of manufacturing tools. Both approaches were applied and compared, showing similar final quality. This experiment confirms the quality of measurements and shows that a staightforward manufacturing from data approach is feasible.

References

Timothée Jost, Christian Schütz & Heinz Hugli, " Color digitizing and modeling of free-form 3D Objects", SPIE Electronic Imaging '99, Three-Dimensional Image Capture and Applications II, SPIE Vol. 3640, pp. 38-48, Jan 1999

C. Schütz, T. Jost & H. Hügli, "Numérisation d'objets 3D", MSM Marchés Systèmes Management, pp 20-21, décembre 1998

Timothée Jost, Christian Schütz & Heinz Hugli, "Modeling 3D Textured Objects by Fusion of Multiple Views", Proc. EUSIPCO, pp. 1073-1076, Sept 1998

hu / 23.05.2005
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