Calibrated G-band images of active regions a) NOAA 10960 and b) NOAA 10930 observed on 2007 June 4 and 2006 December 7, respectively. The FOV is 111″ × 111″. The annotation of the axes refers to heliocentric coordinates given in seconds of arc. The region in the rectangular white box is used for further analysis, zooming in on a quiet Sun region that contains numerous G-band bright points that outline the supergranular boundaries. The images were normalized in a way that the mode of the quiet Sun intensity distribution corresponds to unity.