Research: Chapel of Frescoes
Project : Chapel of Frescoes
UMR "Models and simulations for architecture, urbanism and landscape - MAP" under the responsibility of Michel Florenzano is responsible for developing the tools and survey methods, modeling and representation to achieve the model digital 3D buildings included in this program. Among the ongoing projects under this program is the preparation of a 3D model real time. The objectives are firstly achieving a lightweight model for interactive dynamic visualization of the chapel frescoes, to inform the various frescoes informed about the content of the scenes.
Chapel of Frescoes I had a chance to participate to participate in the development of three-dimensional model of the Chapel frescoes located in the Chartreuse of Villeneuve lez Avignon. This work was performed within UMR 694 Map Gamsau - CNRS, work led by Livio DE LUCA, Therefore I urge you immediately to visit the website.
Acquisitions, which took place over two missions, allowed the one hand a statement of the geometry of the premises by laser scanning using FARO Laser Scanner to measure differential phase and other photographic coverage at high resolution (25 megapixels) in the chapel for texturing 3D models generated. Once the survey phase is complete, the modeling can begin. This can be achieved in two ways: semi-automatic modeling using the Laser (mesh) or image models (reconstruction of objects by photogrammetry using different snapshots of the same object).In cases of mesh data Laser, the first work is to treat the point clouds (integration of different clouds in a common repository and automatic meshing using suitable algorithms). To lighten the models and provide a 3D structure models of better data, it may be possible to model certain volumes from geometric primitives, rather than mesh, especially in the case of flat surfaces. The image models, she exploits the geometry of the different images to reconstruct the morphology of objects. This technique is particularly suitable for components modeled by geometric primitives, the return is based on a discrete set of points. Is obtained after this step a 3D model ready to be textured Texturing 3D models can give the scene more realistic. These are applied by spraying or planar perspective from photos taken at the site. To get the best results, photos used must have been acquired with the same exposure settings. The projection of texture was performed by rectification and planar projection images after distortion correction (what works in the case of planar objects). The latter technique allows more complex texture objects, but requires the calculation of guidance cameras (position, orientation and internal calibration parameters).