Kinect uses an RGB camera with depth sensor and infrared projector with a monochrome CMOS sensor which sees the environment not as a flat image, but as dots arranged in a 3D environment. This technology was developed by PrimeSense, an Israeli company, which was later taken over by Microsoft. The glue that makes Kinect work is the software developed by Microsoft which has been trained to distinguish between different people and track movement of their limbs.