I've been asked to fix up the banner in this photo to remove the glare. I've played around with some of the answers I've found on the internet already, but haven't had any luck. Does anyone have any suggestions?
I'm using GIMP.
In the glare the image is totally burned out (all three channels maxed out), so you best bet is to reconstruct the letters (which, fortunately for you, are mostly straight lines).
I would do this (Gimp or PS) by creating a path that outlines the missing bits and overlaps the remaining ones, getting a selection from that, and apply a gradient:
+ at the ends marks the gradient
This is a quick hack, but if you draw the gradient on separate layer, you can play with local opacity to make it blend a bit more naturally in the original image.
Alternatively you add the
Uand the other
T in the processing to remove the glare on them.
Edit: for a slightly cleaner and more natural looking result:
Insert a layer and clone a non-glare area to fill the overexposed glare area: