How does AI recognise your hand signs, gestures and movements?

The concept of recognising gestures using hands and/or other body parts is based on three layers: Detection, Tracking and Recognition. We use special interfaces that can capture these movements, and later use computer vision technology & deep learning algorithms to understand the underlying pattern. Today, they are several gesture-interface products in the market made by Big Tech giants like Intel, Apple & Google for applications in home automation, shopping, virtual/augmented reality gaming, consumer electronics and navigation among others.