aliasing
Aliasing
Used in the context of processing digitized signals (e.g. audio) and images (e.g. video), aliasing describes the effect of undersampling during digitization which can generate a false (apparent) low frequency for signals, or staircase steps along edges in images (jaggies.) Aliasing can be avoided by an antialiasing (analogue) low-pass filter, before sampling. The term antialiasing is also in use for a posteriori signal smoothing intended to remove the effect.
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Based on content from The Data Analysis Briefbook (http://rkb.home.cern.ch/rkb/titleA.htmlhttp://rkb.home.cern.ch/rkb/titleA.html)
| Title | aliasing |
|---|---|
| Canonical name | Aliasing |
| Date of creation | 2013-03-22 12:04:23 |
| Last modified on | 2013-03-22 12:04:23 |
| Owner | akrowne (2) |
| Last modified by | akrowne (2) |
| Numerical id | 8 |
| Author | akrowne (2) |
| Entry type | Definition |
| Classification | msc 68U10 |
| Classification | msc 94A08 |