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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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"aliasing" is owned by akrowne.
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Cross-references: term, filter, edges, generate, images
There is 1 reference to this entry.
This is version 4 of aliasing, born on 2001-12-25, modified 2003-07-09.
Object id is 1142, canonical name is Aliasing.
Accessed 4741 times total.
Classification:
| AMS MSC: | 68U10 (Computer science :: Computing methodologies and applications :: Image processing) | | | 94A08 (Information and communication, circuits :: Communication, information :: Image processing ) |
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