Mostly, these are manual-focus cameras and contain an old CCD array instead of comparatively newer CMOS array.The lenses of the cameras are removed and then these are attached to telescopes to record images, video, still, or both.
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.
One such function has the webcam act as a "magic mirror" to allow an online shopper to view a virtual item on themselves.
The Webcam Social Shopper is one example of software that utilizes the webcam in this manner.
New features such as automatic lighting controls, real-time enhancements (retouching, wrinkle smoothing and vertical stretch), automatic face tracking and autofocus, assist users by providing substantial ease-of-use, further increasing the popularity of webcams.