This was a really good article by 3EIGE — very useful info for people who want to know more about how to do photo enhancement.
Nearly all photo album applications can make basic image adjustments. Sometimes you need more than they can provide in order to clean up a digital image. In the first of a series of digital imaging guides, graphic artist Dave Girard introduces us to some basic image adjustments anyone can make using Paintshop Pro, Photoshop, or even the free, multiplatform image-editing program, The GIMP.
(Via Ars Technica.)