Comparison of different noise correction methods applied to asymmetry. The four panels present the results for (a) calculating background asymmetry without minimization (statmorph is used), (b) calculating background asymmetry with minimization, (c) Eq. (28) with f₁ = 1 and , proposed by Wen & Zheng (2016), and (d) Eq. (28) with f₁ = 2.25 and f₂ = 2.1, our proposed values. Our improved noise correction exhibits enhanced performance in correcting for noise effects and reproducing the noise-free asymmetry.