  Human Computer Interaction (HCI) is a field in which developer makes a user
friendly system. User can interact with a computer system without using any
conventional peripheral devices. Marker is used to recognize hand movement
accurately & successfully. Researchers establish the mechanism to interact with
computer system using computer vision. The interaction is better than normal
static keyboard and mouse. This paper represents most of innovative mechanisms
of the finger tracking used to interact with a computer system using computer
vision.
