This image would not be possible without it.
It is an image of a stained glass door of a shop. It was taken from the outside, but as the interior of the shop was not bright enough, it actually looked just greyish from outside the shop.
Nonetheless the camera' sensor was sensitive enough to discriminate these faint colours and captured some data, but that was sufficient enough for vibrancy to work. What it does then was to give a massive boost to the saturation of the these "unseen" colours but without saturating those already saturated, enabling us to see the stained glass art in its full glory.
Photo credits: Lawrence Wee.