Point Clouds
A further data reduction compared to nets as the representation of real world objects can be achieved by looking only at the points themselves, which means that the information about the connection structure is being lost.
The subject of research now is to analyze to what extent this is sufficient for getting usable results for interactive modelling with this scattered data.
Smoothing noisy data
The principal problem of treating scattered data (or point clouds) is to suitably substitute the connectivity of a net topology.Already the visualization of such objects is not straight-forward and leaves many liberties.
The
figure shows a global modelling of the object (top left picture) while
preserving local details (multiresolution modelling): First the amount
of data was reduced to 3% (bottom left picture), then the object was
interactively modelled (bottom right picture), and finally it was set back to the
original level of detail by summing the detail coefficients using a
refinement of the point cloud (top right picture). Click the pictures for a
more detailled view.
 | | .jpg) |
| Reduction | Refinement | |
.jpg) | Interactive Modelling | .jpg) |
