aliasing


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Related to aliasing: Anti aliasing

aliasing

[′āl·yəs·iŋ]
(computer science)
In computer graphics, the jagged appearance of diagonal lines on printouts and on video monitors.
(mathematics)
Introduction of error into the computed amplitudes of the lower frequencies in a Fourier analysis of a function carried out using discrete time samplings whose interval does not allow the proper analysis of the higher frequencies present in the analyzed function.

aliasing

(jargon)
When several different identifiers refer to the same object. The term is very general and is used in many contexts.

See alias, aliasing bug, anti-aliasing.

aliasing

(hardware)
(Or "shadowing") Where a hardware device responds at multiple addresses because it only decodes a subset of the address lines, so different values on the other lines are ignored.

aliasing

(1) See alias.

(2) In computer graphics, aliasing is the stair-stepped appearance of diagonal lines when there are not enough pixels in the image or on screen to represent them realistically. Also called "stair-stepping" and "jaggies." See anti-aliasing.


Low and High Resolutions
A low-resolution image showing the stair-stepping is on the left. The higher-resolution version is on the right.