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. Author manuscript; available in PMC: 2009 Sep 22.
Published in final edited form as: Opt Express. 2008 Aug 4;16(16):12313–12333. doi: 10.1364/oe.16.012313

Fig. 4.

Fig. 4

The parameter optimization scheme used in adaptive LPND (ALPND) technique. The filter kernel size N used to compute gradients for nonlinear diffusion and the diffusion threshold td are iterated through a set of values in an empirically determined range and a quantitative figure of merit μ is evaluated at each step. The optimal values for td and N are determined by maximizing μ.