Image Analysis and Processing, International Conference on (2007)
Sept. 10, 2007 to Sept. 14, 2007
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ICIAP.2007.74
Kristin Norell , Swedish University of Agricultural Sciences, Sweden
Joakim Lindblad , Swedish University of Agricultural Sciences, Sweden
Stina Svensson , Swedish University of Agricultural Sciences, Sweden
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, resampling of the image and interpolation of new pixel values are avoided. We also handle the case of grey weighted distance transform in a 5 X 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.
K. Norell, S. Svensson and J. Lindblad, "Grey Weighted Polar Distance Transform for Outlining Circular and Approximately Circular Objects," 2007 14th International Conference on Image Analysis and Processing - ICIAP 2007(ICIAP), Modena, 2007, pp. 647-652.