@INPROCEEDINGS{4761623,
title={Spatially-variant morphological operations on binary images based on the polar distance transform},
author={Norell, K. and Lindblad, J.},
journal={Pattern Recognition, 2008. ICPR 2008. 19th International Conference on},
year={2008},
month={Dec.},
doi={10.1109/ICPR.2008.4761623},
ISSN={1051-4651}, }