I learnt image color correction in several stages. First was of course playing in RGB with scanned pictures. I used shareware Paint Shop Pro back in those days, which at some point was acquired by Corel. And it was cool, levels – or actually auto-levels – was all the buzz, as well as Hue and Saturation. Curves felt almost like magic. Then I took a desktop publishing course, read a few books, and learnt about CMYK and prepress. That was the first time I heard about color models, working with channels, as well as various issues that arose from incorrect conversions between various CMYK and RGB profiles.
