I'm trying to make a mobile AR application. I want to track the user's handwriting in real time using smartphones while the user writes on paper. That is to track every stroke made by the user.
I know some SDKs and products like ManoMotion and Leap Motion provide relatively precise hand tracking and analysis, but since writing on paper doesn't involve many motions and gestures, I don't think they are suitable.
I have searched online and haven't found any resources for my particular use case. So I would like to ask if there are other resources I should take a look at, or I should rely on some lower level APIs like OpenCV.