Digital restoration using Image-Based 3D models

This article present some results related to different case studies in which it is addressed the problem of digital restoration using digital 3D models exclusively produced by means of image-based technologies. The integrally IB approach is justify by different requirements: the first is linked to the possibility to obtain efficient 3D models complete with texture in easy way. The second is linked to the time of capture of these models and the third on the better management of the workflow due to the excellent performance with low-polygon models generated by IB technologies. Of course the same approach you can get on every type of 3D models, also obtained by laser scanning, but with more problems related to the textures and the management of large amounts of data. The full 3D approach to the problem of the restoration of archaeological finds extremely damaged, raises several points of interest, including sculpting and painting directly on surfaces, as well with the possibility of reintegration of the missing parts using other sculptural elements in similar subjects best preserved. Starting from these premises, we carried out a comparative test on different image-datasets with different ISO and different resolution, to provide a metric comparison of results, as an operational base that allows to know, in advance, the criticality metric in IB surveys.