Fig. 6.

Example push-pull inhibitory eDOG model responses for flashing (F _pg(d _pg,0)) and patch-grating (F _pg(d _pg,2πν_pg)) spots, cf. Eqs. 38–39. a Flashing-spot response as a function of spot diameter. Solid line: C = 0, i.e., standard DOG. Dashed line: C =  −1.5, c = 0.83 deg. Dotted line: Variation of push-pull inhibitory eDOG model with the Gaussian loop-kernel replaced with a function of the type in Eq. 24 with the constant , deg deg and σ_n = 0; DOG parameters are A ₁ = 1, a ₁ = 0.25 deg, A ₂ = 0.85, and a ₂ = 0.83 deg. b Patch-grating response for ν_pg = 0.3 cycles/deg as a function of spot diameter d _pg for the same models considered in upper left panel. c Thin lines: Full-field grating response as a function of spatial frequency ν of the grating. Thick lines: Patch-grating response for d _pg = 0.8 deg as a function of spatial frequency ν_pg of the patch grating. Same models and parameters as in upper panels