Effect of having different dispersion in the center and in the periphery

We do not see a significant widening of the pattern. However, a very relevant bias appears:

Simulations with std 10 in the central 1.5 mm (radius), and std 20 in the rest (up to 3 mm radius):

>> fig_pap_simulaciones_ruidoperiferia_01(5,1)

Simulations with std 10 in the central 1.5 mm (radius), and std 40 in the rest (up to 3 mm radius):

>> fig_pap_simulaciones_ruidoperiferia_01(5,1)

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