Scattering reconstruction using MO-PSO of the static ring with an asymmetric brightness distribution with thermal noise and a gain corruption of 4% (top row), and with thermal noise and a gain corruption of 10% (bottom row). From left to right: simulated blurred ring, ground-truth screen, recovered intrinsic structure, recovered screen, and prior screen. The screens were convolved with the instrumental beam. The subpanels below the second and fourth panels depict the projection on the y-axis of the brightness distribution along the right ascension.