An Automatic Method for Counting Annual Rings in Noisy Sawmill Images

  • Kristin Norell
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5716)


The annual ring pattern of a log end face is related to the quality of the wood. We propose a method for computing the number of annual rings on a log end face depicted in sawmill production. The method is based on the grey-weighted polar distance transform and registration of detected rings from two different directions. The method is developed and evaluated on noisy images captured in on-line sawmill production at a Swedish sawmill during 2008, using an industrial colour camera. We have also evaluated the method using synthetic data with different ring widths, ring eccentricity, and noise levels.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Kristin Norell
    • 1
  1. 1.Centre for Image AnalysisSwedish University of Agricultural SciencesSweden

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