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Examples

The following B-spline surfaces are benchmarks surfaces from Mercedes-Benz AG. The first one is part of a fender and the second one is part of a motor hood with a small bump in the middle. In both pictures the isophotes are used to visualize the quality of the surfaces and in both cases only the boundary curves are left fixed.

Figure: Part of a fender before and after smoothing (max_error=$0.02\%$, $0.43$ sec.).
\begin{figure} \centerline{\hfill \epsfxsize 75mm \epsfbox{fender_ori.ps} \hfill \epsfxsize 75mm \epsfbox{fender_smooth.ps} \hfill}\end{figure}

Figure: Part of a motor hood before and after smoothing (max_error=$0.02\%$, $0.43$ sec.).
\begin{figure} \centerline{\hfill \epsfxsize 75mm \epsfbox{hood_ori.ps} \hfill \epsfxsize 75mm \epsfbox{hood_smooth.ps} \hfill}\end{figure}