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Grey Weighted Polar Distance Transform for Outlining Circular and Approximately Circular Objects
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Centre for Image Analysis. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Centre for Image Analysis.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Centre for Image Analysis.
2007 (English)In: 14th International Conference on Image Analysis and Processing: ICIAP 2007, 2007, 647-652 p.Conference paper, Published paper (Refereed)
Abstract [en]

We introduce the polar distance transform and the grey weighted polar distance transform for computation of minimum cost paths preferring circular shape, as well as give algorithms for implementations in a digital setting. An alternative to the polar distance transform is to transform the image to polar coordinates, and then apply a Cartesian distance transform. By using the polar distance transform, re-sampling of the image and interpolation of new pixel values are avoided. We also handle the case of grey weighted distance transform in a $5\times 5$ neighbourhood, which, to our knowledge, is new. Initial results of using the grey weighted polar distance transform to outline annual rings in images of log end faces are presented.

Place, publisher, year, edition, pages
2007. 647-652 p.
National Category
Computer Vision and Robotics (Autonomous Systems)
Identifiers
URN: urn:nbn:se:uu:diva-12282DOI: 10.1109/ICIAP.2007.74ISBN: 0-7695-2877-5 (print)OAI: oai:DiVA.org:uu-12282DiVA: diva2:40051
Available from: 2007-12-10 Created: 2007-12-10 Last updated: 2015-01-16Bibliographically approved

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Norell, KristinLindblad, JoakimSvensson, Stina

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