[yaris]

When looking at this I remembered two projects I saw several years ago: one was using a wearable camera and colored markers on fingers plus some computing to recognize gestures, e.g. making a square with fingers would command the camera to do a "screenshot"; the other one was using giro-sensors put on fingers to recognize finger and hand movements. Both looked interesting, but I have not heard about any of them since then.

[harshitaneja]

I think you are referring to Pranav Mistry's Sixth Sense(https://www.pranavmistry.com/archived/projects/sixthsense/). It was part of his research at MIT media labs. I don't think he took it any further. Maybe got incorporated in some ways at Samsung where he headed research.