I spent quite a bit of time trying to find a software tool I could use to modify image colors as I had described in my last post. I tried half a dozen different packages and none of them seemed to do what I wanted to do. It seemed like a fairly simple task and yet there was only one tool that held out any promise...
Then, I decided to do some reading and found my answer. I say I did some reading, because I really need to drive home the fact that even though I've been preaching about reading the manual, I failed to do so with a software tool I've been using for years.
When I read the manual again, I found that what I wanted to do was right there!!! What a dork I was - if I had only followed my own advice I could have cut weeks off of this process.
I will be making a screencast soon to illustrate the process.