(1) In communications, interference (static) that destroys the integrity of signals on a line. Noise can come from a variety of sources, including radio waves, nearby electrical wires, lightning, and bad connections. One of the major advantages of fiber optic cables over metal cables is that they are much less susceptible to noise.
(2) In general, anything that prevents a clear signal or message from being transmitted. For example, you might hear someone complain of a lot of noise in a newsgroup, meaning that there are many superfluous messages that don't add anything to the discussion.
(3) In digital images and
digital photography the term noise is
used to describe the occurrence of color dots or specks where there should be
none. For example, in a digital image of a pool of blue water, you may notice
white, grey or other colored specks in the image where it should be blue. In
scanning technology, image noise is usually referred to
as grain or film grain.
Comparison of power protection methods Compares the level of protection offered by different types of devices, such as UPS's, line conditioners, and surge suppressors. This page is from "The PC Guide".
External power problems Describes common electrical problems, such as line noise, surges, and brownouts. This page is part of "The PC Guide".
Protection against power problems Describes devices, such as surge suppressors and line conditioners, that can help with electrical problems. This page is part of "The PC Guide".
Neat Image Neat Image is a filter designed to reduce visible noise and grain in photographic images produced by digital cameras and scanners. Neat Image is indispensable in low-light (indoors, night, astro) and high-speed (sport, action) photography. It is a tool for both professional photographers and digital image processing enthusiasts.
Webopedia's Quick Reference: The Digital Camera Picture If you can't keep up with advances in digital camera, you're not alone. We help you make sense of megapixels, zero in on the zooms (digital, optical and total) and delve into everything from price points to paper to printers.
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