Measured concentration index (left), Gini coefficient (middle), and the M₂₀ index (right) for the idealised mock images in the CEERS survey as a function of the relative size of the galaxy (R_e/FWHM), with different colours representing different Sérsic indices. The top and bottom rows show the structural parameter (C, G, and M₂₀) and the deviation from the intrinsic values (ΔC, ΔG, and ΔM₂₀), respectively. This trend in each panel is similar to Fig. 15.