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Two-dimensional (A) angular function modeled with θ′ = π/2 (relative to polarization, double-headed arrow), ϑIPF = π/2, (B) radial function modeled with ρ′ = 100 pixels, σ = 10 pixels, ε = θ″ = 0 and (C) background function modeled with σ′ = 5 pixels and ε = θ″ = 0. Their combination results in Eqs. 10 and 11 that are represented by function (D).
