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Estimation of shrinkage coefficients in radial and tangential directions from CT images
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
Faculty of Engineering and Natural Sciences, Norwegian University of Science and Technology (NTNU), Ålesund.
Luleå University of Technology, Professional Support, IT-Service.
Number of Authors: 3
2016 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280Article in journal (Refereed) Epub ahead of print
Abstract [en]

The aim of the present work was to use the displacement information generated from the spatial alignment in order to compute wood shrinkage in the radial and tangential directions in computed tomography (CT) images, and to compare the results with those obtained with computer-aided design software on the same images. To estimate the shrinkage coefficients from tomography images, wood specimens in the green state, equilibrium moisture content 15% and 8% state and oven dry condition were scanned. Specimens were taken from Norway spruce and Scots pine logs. The root-mean-square-error calculations showed acceptable small differences between the two measuring methods, which means that the algorithm is a useful tool for estimating the shrinkage coefficients in radial and tangential direction from CT images. This provides an image processing tool to monitor the dimensional changes during the drying and heat treatment process. 

Place, publisher, year, edition, pages
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
URN: urn:nbn:se:ltu:diva-60142DOI: 10.1080/17480272.2016.1249405ScopusID: 2-s2.0-84997272329OAI: diva2:1044520
Available from: 2016-11-03 Created: 2016-11-03 Last updated: 2016-12-12

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Hansson, LarsFjellner, Bengt-Arne
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