Toward a multimodal photogrammetric acquisition and processing methodology for monitoring conservation and restoration studies

Close-range photogrammetry is nowadays a common technique applied to acquire 3D data on Cultural Heritage (CH) artifacts. Image-based modeling are indeed providing useful resources for the documentation and the conservation but it is also set more recently as a monitoring tool that could help the decision making in term of restoration. The 3D footprint restitutes as a point cloud, the appearance according to a definite spatial resolution and at a given time, the visible surface of an artifact. Nevertheless, different techniques of scientific imaging are also used to obtain complementary information. This paper explores a multimodal approach of the photogrammetric survey and data processing to reach a multidimensional data integration (i.e. spatial, temporal and, or spectral).