A guide to unsupervised image segmentation of mCT-scanned cellular metals with mixture modelling and Markov random fields

Panić, Branislav (avtor), Borovinšek, Matej (avtor), Vesenjak, Matej (avtor), Oman, Simon (avtor), Nagode, Marko (avtor)

Characterising the structure of cellular metals is a difficult task. The internal structure of cellular metals can be determined using micro-computed tomography (mCT). However, mCT scanning provides digital images in greyscale with various problematic artefacts. In addition, the grey intensity of cellular metals usually varies greatly due to the internal porosity of the material. Therefore, binary image segmentation to extract material segments from digital images is quite difficult. Our contribution can be summarised as follows. A comprehensive evaluation of various mixture models that have been shown in the literature to be useful for tomography, but for the purpose of binary image segmentation of cellular metals and internal porosity assessment. We propose a novel merging technique to merge different components of the mixture model for the purpose of binary image segmentation of cellular metals. Finally, to enforce spatial regularisation and further improve the binary image segmentation, we combine the obtained two-segment mixture model (material-void mixture model) with Markov random fields and evaluate the effects of different strengths of spatial regularisation. Our proposals are thoroughly investigated using five different types of cellular metals. The reported results are promising and competitive and speak in favour of the relevance of our proposals.

• Jezik: Angleški jezik
• Ključne besede: mixture model, spatial regularisation, Markov random fields, cellular metals, porosity
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 13 str.
• Številčenje: Vol. 239, art. 112750
• PID: 20.500.12556/RUL-154730
• UDK: 620.1
• ISSN pri članku: 1873-4197
• DOI: 10.1016/j.matdes.2024.112750
• COBISS.SI-ID: 186796035
• Datum objave v RUL: 26.02.2024

Gradivo je del revije

• Naslov: Materials & design
• Založnik: Elsevier Science
• ISSN: 1873-4197
• COBISS.SI-ID: 56288771

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.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: mešani model, prostorska regularizacija, Markova naključna polja, celične strukture, poroznost

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0182
• Naslov: Razvojna vrednotenja

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0063
• Naslov: Konstruiranje celičnih struktur