As an example a preliminary 3D reconstruction of the cathedral of Antwerp is shown in Figure 9.24. An important registration project has recently started and the goal is to obtain a 3D model of the cathedral that could be used as a database for future preservation and restoration projects. For some of these projects an accurate texture of the model is crucial, since the level of stone degradation can be deduced from it. In this context the method proposed in this work has a lot to offer. An interesting approach would consist of combining the existing close-range photogrammetric techniques with our techniques. This could lead to an important increase in productivity without giving in accuracy.
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