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The lenses of the cameras are removed and then these are attached to telescopes to record images, video, still, or both.
In newer techniques, videos of very faint objects are taken for a couple of seconds and then all the frames of the video are "stacked" together to obtain a still image of respectable contrast.
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.
With very-low-light capability, a few specific models of webcams are very popular to photograph the night sky by astronomers and astro photographers.
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).
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.
Webcams have been used for augmented reality experiences online.
One such function has the webcam act as a "magic mirror" to allow an online shopper to view a virtual item on themselves.
A webcam is a video camera that feeds or streams its image in real time to or through a computer to a computer network.