Abstract
The urn, recovered in 2013 by the Cultural Heritage's Police Command along with other 21 and with the funeral set of the tomb of the Cacni family at Perugia, was exhibited at the Quirinale and then moved to Perugia, at the National Archaeological Museum of Umbria. 2014. After a first attempt to survey the laser scanner, the survey, aimed at the graphic documentation and implementation of a virtual model for the study and dissemination, has been performed with photographic processed with software modeling structure from motion.3D model in mesh made with the appropriate software has been cleaned of all its impurities: holes, tips, noise and rough surfaces. To conclude the process, the mapping from photography, with high resolution textures, giving the mesh the appearance next to the real funerary urn. The survey work on the urn of Oenomaus is a case in point, both for research of best practices in the surveys of archaeological objects, both in the ultimate goal of the relief: not only cataloging and knowledge, but also of divulging to a wider public.
Highlights
Introduction and study casesIn recent years the use of laser scanners and photographic modeling has increased significantly
We must grapple with these instruments, know them, understand them and know what might be the application fields. In this example the use of the laser scanner was totally unnecessary given the considerable problems of the shadow zones, and it was unthinkable to join together 138 shots by laser scanner
We believe that the proposed case study, is an excellent example of what today would be the relationship with art and the artistic and cultural heritage that abounds in Italy: protection and preservation but at the same time divulging and research
Summary
In recent years the use of laser scanners and photographic modeling has increased significantly. According to the camera that is used is possible to determine the scale of representation in which it is possible to show the detected object, so that details are not lost To calculate it takes advantage of the GSD, ground sample distance, which identifies the smallest element of real space that can be represented in the digital image, taking into account the sensor pixel size. It is obviously useful when the survey design, to determine the distances of the shooting points from the object. One of the expedients which allows a better calibration of the orientation of the camera is definitely to have a major characterization of the surfaces of the objects to be detected: a uniform and white stone hardly lead to the realization of a three-dimensional model, but it doesn’t happens for the urn of Oenomaus, where we find a porous travertine (with holes of different sizes), painted in different areas and in which there are evident light and shadow zones
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