I want my app to be able to recognise characters that I draw on screen, but I really don't know where to start - is there an external, etc. ?
I did some basic character recognition for my 'Spell With Kyle' app. It currently only recognises one character at a time, but the idea could be worked on if you need something more complex. There's an explanation of the technique and an example stack at http://splash21.com/Gestures.html
HTH :D
(It's just LiveCode - no external)