It would be really useful for redump if ring unwrapping could be added, as it makes reading the ringcodes way easier.
Here's how I've done it in GIMP:
- crop scan to ring
- in gimp: filters>distort>polar coordinates
circle depth: 100%
map backwards = off
map from top = off
to polar = off [from polar, i.e. to rectangle]
- reduce height to 25%
Example result:

It would be really useful for redump if ring unwrapping could be added, as it makes reading the ringcodes way easier.
Here's how I've done it in GIMP:
circle depth: 100%
map backwards = off
map from top = off
to polar = off [from polar, i.e. to rectangle]
Example result:
