Oh, no, this is technically not finger tracking--at least, not automatically. In iPi Mocap Studio, you can pose fingers or use presets and keyframe these poses. The software drops the keyframes with a ramp on the timeline so you can easily blend from pose to pose. The 'tracking' part, so to speak, comes from looking a key pose in the reference video and selecting the pose preset (or creating a new one) that matches what you see. As stated, it's not automatic and the current system could use some refinement, but it's a fast process and the results can be pretty convincing. It's actually quite good for an initial implementation of a new feature.
FYI, when you're holding the motion controllers, as seen in the video, it's impossible to track fingers anyway. The alternative is the attach the controllers to the back of the hand so that you have actual finger poses to reference. Two users here demonstrated a couple of different approaches to this this. I'm working on a version of a glove myself but it may have to wait until we're finished with our current project.
I hope this clarifies what you're seeing in the video. What was really being tested there is the Move controllers, which was the newest feature when I made the video. I've since added a third Move controller for the head and it works surprisingly quite well--the subtlety it can pick up for head rotation is amazing. I don't have a public video uploaded for this but you can see the helmet I put together on our blog:
http://littlegreendog.blogspot.com/ (Scroll down to April 19, 2013.)
The wrist capture work well too but it's a little trickier to keep aligned for long durations with quick hand motions. In the test, you can see the rotation is a little off in the raw data portion--but this error is easily corrected in Motion Builder or in any animation program. In my experience so far, wrist capture works best for shorter motions and if the motions are not too 'snappy'. Tip: when you Move controllers, it's helpful to record an alignment pose at the beginning and end of the capture video.
BTW, that was my very first test with the Move controllers. Having practiced a lot since then, I find I'm getting more accurate results for wrist capture now. It's still trickier than accurate head capture though.
For true fingers capture, the iPi developers mentioned elsewhere that they are looking into adding
Myo support. In theory, Myo could give you full hand capture in Mocap Studio, including wrist, fingers, and possibly forearm rotation. The device is not available yet so it may be a while before we know if Myo will work accurately enough for motion capture.
G.
