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.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.Researchers claim that this method is accurate to ±5 bpm.Webcams may be installed at places such as childcare centres, offices, shops and private areas to monitor security and general activity.The term "webcam" (a clipped compound) may also be used in its original sense of a video camera connected to the Web continuously for an indefinite time, rather than for a particular session, generally supplying a view for anyone who visits its web page over the Internet.
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.
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.
Track IR is a commercial version of this technology.
Webcam features and performance can vary by program, computer operating system, and also by the computer's processor capabilities.
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.