Anti-aliasing
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 domains.In the image domain, aliasing artifacts can appear as wavy lines or bands, or
moiré patterns, or popping,
strobing, or as unwanted sparkling; in the sound domain, as rough, inharmonic, 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.
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Anticrénelage
L’anticrénelage ou anti-aliasing est une méthode permettant d'éviter le
crénelage, un phénomène qui survient lorsqu'on visualise certaines images numériques dans certaines résolutions.
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Antialiasing
Bei Antialiasing [] (auch Treppenglättung oder Kantenglättung genannt) werden Signalanteile oberhalb der
Nyquist-Frequenz durch
Tiefpassfilterung gedämpft. Der Begriff wird bei der Computergrafik wie auch in der Elektroakustik verwendet, das grundsätzliche Prinzip ist dabei identisch.
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Antyaliasing
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Antialiasing
L' antialiasing (delle volte abbraviato con AA) è una tecnica per ridurre l'effetto aliasing (scalettamento) quando un segnale ad alta
risoluzione viene mostrato a bassa risoluzione. L'antialiasing ammorbidisce le linee smussando i bordi e omogeneizzando l'immagine.
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