I've long been curious about how to extract information from images with computers. In particular, I want to stick a camera at the top of my driveway and capture the license plates of the thoughtless buggers who roar up the road when the rest of us are in bed. But to get to there, I first need to know how to arse with images.
So I've really enjoyed reading this course in computer vision. No huge pages of code. The math isn't that daunting and can be easily skimmed if you're reading for an overview. Interestingly, it appears to have been written for UNESCO by someone in Vietnam (there are other courses. I love the internets.