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. Author manuscript; available in PMC: 2011 Jun 15.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2010;2010:871–874. doi: 10.1109/IEMBS.2010.5627889

Fig. 2.

Fig. 2

The reference image ρref (r) (top) and the resulting penalty weighting functions {wn(r)} (bottom). Note that weighting is defined separately for the vertical (left) and horizontal (right) gradients.