Anti

This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed. (December 2007)

In digital signal processing, anti-aliasing is the technique of minimizing the distortion artifacts known as aliasing when representing a high-resolution signal at a lower resolution. Anti-aliasing is used in digital photography, computer graphics, digital audio, and many other applications.

In the image domain, aliasing artifacts can appear as wavy lines or bands, moirÃ© patterns, popping, strobing, or as unwanted sparkling. In the sound domain they can appear as rough, dissonant, or spurious tones, or as noise.

Anti-aliasing means removing signal components that have a higher frequency than is able to be properly resolved by the recording (or sampling) device. This removal is done before (re)sampling at a lower resolution. When sampling is performed without removing this part of the signal, it causes undesirable artifacts such as the black-and-white noise near the top of figure 1-a below.

In signal acquisition and audio, anti-aliasing is often done using an analog anti-aliasing filter to remove the out-of-band component of the input signal prior to sampling with an analog-to-digital converter. In digital photography, optical anti-aliasing filters are made of birefringent materials, and smooth the signal in the spatial optical domain. The anti-aliasing filter essentially blurs the image slightly in order to reduce resolution to below the limit of the digital sensor (the larger the pixel pitch, the lower the achievable resolution at the sensor level).

See the articles on signal processing and aliasing for more information about the theoretical justifications for anti-aliasing. The remainder of this article is dedicated to anti-aliasing methods in computer graphics.

About Anti

This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed. (December 2007)In digital signal processing, anti-aliasing is the te... Read more

Anti related Videos

Recent talks about Anti

How sad that a once respected entity has become the laughing stock of the world. But even sadder is the fact that even if this type of article, if not believed verbatim, that carries the undercurrent of anti-Israel/Semitism is embraced with fervor. Is there a way to sue the BBC for false reporting?

Sharp and to the point

So Michael Jackson is sick! Well maybe but hereâ€™s my take on it â€“ if he is sick he is sick in the head! Now don't get me wrong I'm not completely anti-Jackson when the man moves man does he move thake a look at this

Allowing Iran's president to deliver Channel 4's Alternative Christmas Message will cause "international offence", the government says. The decision angered some MPs, who branded him a "dangerous fanatic" with anti-semitic and anti-gay views.Channel 4 said it was offering viewers an "alternative world view".

Spyware and Adware had done better than viruses as a threat to the theft of user information and break down of computer performance

Search result for "anti" :