20.500.12556/RUL-137519 Microtomographic analysis of a Palaeolithic wooden point from the Ljubljanica River A rare and valuable Palaeolithic wooden point, presumably belonging to a hunting weapon, was found in the Ljubljanica River in Slovenia in 2008. In order to prevent complete decay, the waterlogged wooden artefact had to undergo conservation treatment, which usually involves some expected deformations of structure and shape. To investigate these changes, a series of surface-based 3D models of the artefact were created before, during and after the conservation process. Unfortunately, the surface-based 3D models were not sufficient to understand the internal processes inside the wooden artefact (cracks, cavities, fractures). Since some of the surface-based 3D models were taken with a microtomographic scanner, we decided to create a volumetric 3D model from the available 2D tomographic images. In order to have complete control and greater flexibility in creating the volumetric 3D model than is the case with commercial software, we decided to implement our own algorithm. In fact, two algorithms were implemented for the construction of surface-based 3D models and for the construction of volumetric 3D models, using (1) unsegmented 2D images CT and (2) segmented 2D images CT. The results were positive in comparison with commercial software and new information was obtained about the actual state and causes of the deformation of the artefact. Such models could be a valuable aid in the selection of appropriate conservation and restoration methods and techniques in cultural heritage research. computer vision computed tomography 3D surface-based models 3D volumetric models Palaeolithic wooden point conservation waterlogged wood archaeological documentation heritage science računalniški vid računska tomografija površinski 3D modeli volumetrični 3D modeli paleolitska lesena konica konzerviranje moker les arheološka dokumentacija dediščinska znanost true false true Angleški jezik Slovenski jezik Članek v reviji 2022-06-20 12:47:10 2022-06-20 12:47:11 2022-09-15 04:15:19 0000-00-00 00:00:00 2022 0 0 41 str. iss. 6, art. 2369 Vol. 22 Mar. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.93:902 1424-8220 10.3390/s22062369 102395651 sensors-22-02369-v2.pdf sensors-22-02369-v2.pdf 1 D68F57687C3C6807998E3521BA3B37E6 771f976ddea9ffffc9a5a585f68dd2e1326944b1c7530e376b9776055c62d612 6a3f665e-f086-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=157492 https://www.mdpi.com/1424-8220/22/6/2369 1 2acbcbe6-f086-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=157491 Fakulteta za računalništvo in informatiko 0 0 0