On 3D scanning, reconstruction, enhancement, and segmentation of logs
2003 (English)In: Image Analysis: 13th Scandinavian Conference, SCIA 2003 Halmstad, Sweden, June 29 – July 2, 2003 Proceedings / [ed] Josef Bigun and Tomas Gustavsson, Springer Berlin/Heidelberg, 2003, Vol. 2749, 733-740 p.Chapter in book (Refereed)
This paper presents novel results from an ongoing feasibility study of fully 3D X-ray scanning of Pinus Sylvestris (Scots Pine) logs. Logs are assumed to be translated through two identical and static cone beam systems with the beams rotated 90degrees relative to eachother, providing a dual set of 2D-projections. For reasons of both cost and speed, each 2D-detector in these two systems consists of a limited number of line detectors. The quality of the reconstructed images is far from perfect, due to sparse detector data and missing projection angles. In spite of this we show that by employing a shape- and direction discriminative technique based on second derivatives, we are able to enhance knot-like features in these data. In the enhanced images it is then possible to detect and localize the pith for each whorl of knots, and subsequently also to perform a full segmentation of the knots in the heartwood.
Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2003. Vol. 2749, 733-740 p.
Lecture Notes in Computer Science, ISSN 0302-9743 (print), 1611-3349 (online) ; 2749
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-48578DOI: 10.1007/3-540-45103-X_97ISBN: 3-540-40601-8ISBN: 978-3-540-40601-3ISBN: e-978-3-540-45103-7OAI: oai:DiVA.org:liu-48578DiVA: diva2:269474