Sketch can be found here.
To use:
Toggle the training information by tapping 'z'.
Toggle the hand instructions by tapping 'm'.
For this project, I was interested in creating a virtual theremin, where much like an actual theremin, the positions that a user's right hand makes controls the note on the scale, and a slight wiggle controls the vibrato. I used the adapted Image Classifier to train my program on the hand positions, and looked at a point tracker by Kevin McDonald to track the hand for the vibrato. My main issue was finding good lighting and backgrounds to make the image classifier work reliably - I made a lot of strange sets and stands to make it work, so it's a very location-based project. 
