Impact of noise addition on a simulated disk image. The top row presents an image of a tapered disk with R_c = 25 au and a power-law exponent γ = 0.75 at an inclination of 45°. Correspondingly, the right panel illustrates the integrated flux as the ‘crescent’ (refer to Figure 3) traverses vertically through the disk image on the left, plotted on a logarithmic scale for integrated flux on the y-axis. The green arrow highlights the position of a minor secondary peak representing the backside flux. In the bottom row, the left panel displays the same simulated disk image with added U_ϕ noise, while the right panel shows the integrated flux as the ‘crescent’ moves down through the noise-added image, also plotted on a logarithmic scale for integrated flux on the y-axis.