Microtomographic analysis of a Palaeolithic wooden point from the Ljubljanica River

Guček Puhar, Enej (avtor), Korat, Lidija (avtor), Erič, Miran (avtor), Jaklič, Aleš (avtor), Solina, Franc (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: computer vision, computed tomography, 3D surface-based models, 3D volumetric models, Palaeolithic wooden point, conservation, waterlogged wood, archaeological documentation, heritage science
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FRI - Fakulteta za računalništvo in informatiko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 41 str.
• Številčenje: Vol. 22, iss. 6, art. 2369
• PID: 20.500.12556/RUL-137519
• UDK: 004.93:902
• ISSN pri članku: 1424-8220
• DOI: 10.3390/s22062369
• COBISS.SI-ID: 102395651
• Datum objave v RUL: 20.06.2022

Gradivo je del revije

• Naslov: Sensors
• Skrajšan naslov: Sensors
• Založnik: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 18.03.2022

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: računalniški vid, računska tomografija, površinski 3D modeli, volumetrični 3D modeli, paleolitska lesena konica, konzerviranje, moker les, arheološka dokumentacija, dediščinska znanost

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0273
• Naslov: Gradbeni objekti in materiali