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+ | [{{ paag_aliasing_and_antialiasing.png|a) imagined continuous source signal (yellow)\\ b) perceptual artifacts (white)\\ c) sample (gray)}}] **Aliasing** refers to perceptual distortions or artifacts which are caused by sampling errors when converting a continuous source signal, as seen by the eye, the camera or as imagined, into discrete values on a fixed digital raster. | ||
+ | **Antialiasing** (AA) is an umbrella term for all techniques which aim to lessen the unwanted perceptual artifacts, e.g. by: | ||
+ | - lowering contrast | ||
+ | - averaging or inventing new sample values | ||
+ | - increasing resolution | ||
+ | |||
+ | and others or combinations of these. | ||
+ | |||
+ | (In the example image here, aliasing also shows within the imagined continuous source signal itself.) | ||
+ | |||
+ | further reading: | ||
+ | * [[wp>Aliasing]] | ||
+ | * [[wp>Jaggies]] |