For example, the position of a single light source can be tracked and used to emulate a mouse pointer, a head-mounted light would enable hands-free computing and would greatly improve computer accessibility.This can be applied to games, providing additional control, improved interactivity and immersiveness.Video calling support has also been added to several popular instant messaging programs. Software is available to allow PC-connected cameras to watch for movement and sound, a computer e-mailed images of the burglar during the theft of the computer, enabling the owner to give police a clear picture of the burglar's face even after the computer had been stolen.Unauthorized access of webcams can present significant privacy issues (see "Privacy" section below).Free Track is a free webcam motion-tracking application for Microsoft Windows that can track a special head-mounted model in up to six degrees of freedom and output data to mouse, keyboard, joystick and Free Track-supported games.By removing the IR filter of the webcam, IR LEDs can be used, which has the advantage of being invisible to the naked eye, removing a distraction from the user.
Webcam features and performance can vary by program, computer operating system, and also by the computer's processor capabilities.
Track IR is a commercial version of this technology.
The Eye Toy for the Play Station 2, Play Station Eye for the Play Station 3, and the Xbox Live Vision camera and Kinect motion sensor for the Xbox 360 and are color digital cameras that have been used as control input devices by some games.
Special software can use the video stream from a webcam to assist or enhance a user's control of applications and games.
Video features, including faces, shapes, models and colors can be observed and tracked to produce a corresponding form of control.