Microtomographic analysis of a Palaeolithic wooden point from the Ljubljanica River

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

Abstract

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.

Keywords

računalniški vid;računska tomografija;površinski 3D modeli;volumetrični 3D modeli;paleolitska lesena konica;konzerviranje;moker les;arheološka dokumentacija;dediščinska znanost;computer vision;computed tomography;3D surface-based models;3D volumetric models;Palaeolithic wooden point;conservation;waterlogged wood;archaeological documentation;heritage science;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UL FRI - Faculty of Computer and Information Science
UDC:	004.93:902
COBISS:	102395651
ISSN:	1424-8220
Views:	60
Downloads:	28
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	računalniški vid;računska tomografija;površinski 3D modeli;volumetrični 3D modeli;paleolitska lesena konica;konzerviranje;moker les;arheološka dokumentacija;dediščinska znanost;
Type (COBISS):	Article
Pages:	str. 1-41
Volume:	ǂVol. ǂ22
Issue:	ǂiss. ǂ6
Chronology:	Mar. 2022
DOI:	10.3390/s22062369
ID:	15692276