aliasing

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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

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.
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