Abstract
Abstract. The work aims to present and validate the workflow from the 3D survey to the visualization of cultural heritage objects using the innovative Euclideon Hologram Table©. Three case studies surveyed with three different systems and at three different scales have been selected: Santa Maria delle Grazie in Milan (terrestrial laser scanner for an architecturalscale), the village of Ghesc in the Ossola valley (UAV survey for an environmental scale) and the cuneiform clay tablet number 727 (structured light system for a detailscale). The whole process of transforming the 3D point/mesh model to hologram was verified, analysing the file formats, technical performance and specifications, file dimensions manageable, and details viewable. The first test shows great potentiality, becausethe hologram exploring is impressively fluid even when zooming to view a higher detail level, despite the high number of points/polygons. The power and performance of the point cloud 3D rendering engine result impressive. Nonetheless,different aspects need further research, from point cloud visualization quality to enhancing 3D model interaction.
Highlights
This paper aims to describe and check the workflow from the digital survey to its implementation in an innovative holographic table of several case studies surveyed with three different 3D measurement systems and at three different scales: territorial, architectural and detail
The first is that cleaning the terrestrial laser scanner point cloud significantly increases the visualisation quality
The second is that for huge models, a waving of the hologram can be observed
Summary
This paper aims to describe and check the workflow from the digital survey to its implementation in an innovative holographic table of several case studies surveyed with three different 3D measurement systems and at three different scales: territorial (the small village of Ghesc), architectural (the UNESCO heritage monument of the church of “Santa Maria delle Grazie” and the Convent seat of the Cenacolo Vinciano) and detail (a small clay tablet with cuneiform engraving). The research topic concerns the verification of the whole process for the raw survey dataset conversion in a hologram, considering the remarkable potentiality of this visualisation system. It allows fluid navigation in the point cloud, zoom in to view tiny details and a real-time zoom out to view the entire model. In the last years, thanks to holographic devices such as Microsoft HoloLens 2 it is possible to see some initial application oriented to the professional practice and visualization of complex heritage buildings and scenarios (Teruggi and Fassi, 2021a, Teruggi and Fassi, 2021b).
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