Relative quadrant polarization parameters Σ₂X_xxx (♢) and their azimuthal values Σ₂X_xxx|_ϕ (horizontal bars) for the disk integration region Σ₂ for RingI60 with r₀ = 100.8 mas: (a) instrinsic model, (b) convolved model, (c) Σ corrected model, and (d) Σ₂ corrected model. The green and grey lines in (b) indicate the change of Σ₂X_xxx and Σ₂X_xxx|_ϕ, respectively, with respect to panel a, and in the panels c and d with respect to panel b. All vallues are normalized to $\text{Σ}{Q}_{\varphi }^{\prime }$.