Contrast and image quality after different levels of MOMFBD restoration of CHROMIS Ca II continuum images from 110 scans collected on 2016 September 19. The FOV is 700 × 700 pixels (265 × 265). Processing levels: MOMFBD with and without PD using 60 KL modes, and without PD using only tilt modes (corresponding to shift-and-add by subfield and MTF correction). (a) rms contrast histograms. The numbers in parentheses are the median ± the (robust) standard deviations of the contrasts. (b) One example of the FOV used in (a), comparing the three different levels of processing. The tick marks are 1″ apart. Top left: shift-and-add and MTF correction. Top right: 60-mode MOMFBD. Bottom: 60-mode MOMFBD with PD.