Video features, including faces, shapes, models and colors can be observed and tracked to produce a corresponding form of control.
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.
Unauthorized access of webcams can present significant privacy issues (see "Privacy" section below).
The Webcam Social Shopper is one example of software that utilizes the webcam in this manner.Webcam can be added to instant messaging, text chat services such as AOL Instant Messenger, and Vo IP services such as Skype, one-to-one live video communication over the Internet has now reached millions of mainstream PC users worldwide.This can be applied to games, providing additional control, improved interactivity and immersiveness.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.Other popular uses include security surveillance, computer vision, video broadcasting, and for recording social videos.
The video streams provided by webcams can be used for a number of purposes, each using appropriate software: Most modern webcams are capable of capturing arterial pulse rate by the use of a simple algorithmic trick.
making them the lowest-cost form of videotelephony.
Despite the low cost, the resolution offered at present (2015) is rather impressive, with low-end webcams offering resolutions of 320×240, medium webcams offering 640×480 resolution, and high-end webcams offering 1280×720 (aka 720p) or even 1920×1080 (aka 1080p) resolution.
Webcams can be used to take video clips and still pictures.
Various software tools in wide use can be employed for this, such as Pic Master (for use with Windows operating systems), Photo Booth (Mac), or Cheese (with Unix systems).
When sent to a remote location, the video stream may be saved, viewed or on sent there.