Mild under exposure can be corrected using either Adobe Photo Shop or Paint Shop Pro. However, in
my opinion, Adobe Photo Shop does it best and it is also easier to use. I should mention that
experience has taught me that getting the exposure right in the first place is way better than having to change it
later. I have achieved this more easily since switching to 'aperture priority' mode from 'shutter priority' mode. See the
section on my camera setting under 'Cameras & Scopes' for details.
Let's face it though, no one, not even the professionals, get it right all of the time. So under exposure adjustment can
be useful for correcting mild under exposure. It should not be attempted on really badly under exposed images (e.g. more than 2 stops).
Just throw these away!
There are two ways to do it with Photoshop. If I have taken the picture with my Digital SLR camera in RAW format,
I do it using the Adobe RAW image editor. If I digiscoped the picture using my Coolpics 4500
(and therefore in JPEG format) or just take JPEG format shots with my digital SLR, I use the standard JPEG editor.
Both methods are described and illustrated using the links below:
Adjusting under exposure on RAW format images using photoshop CS2.
Adjusting under exposure on JPEG format images using photoshop CS2.
