The distortion of frequency introduced by inadequately sampling a signal, which results in ambiguity between signal and noise. Aliasing can be avoided by sampling at least twice the highest frequency [..]

A digital artifact consisting of patterns or shapes that have no relation in size and orientation with those found in the original image. This is often caused by too low a scan resolution or sampling [..]

The process by which frequencies too high to be analyzed with the given sampling interval appear at a frequency less than the Nyquist frequency.

In A/D conversion, the Nyquist principle states that the sampling rate must be at least twice the maximum bandwidth of the analog signal. If the sampling rate is insufficient, then higher-frequency components are "undersampled" and appear shifted to lower-frequencies. These frequency-shifted components are called aliases. The frequencies [..]

The jagged appearance of a digital image's diagonal and curved lines, resulting from the square shape of pixels. (See "Anti-aliasing" below for additional information.)

The process by which smooth curves and lines that run diagonally across the screen of a low-resolution digital file take on a jagged look as opposed to a smooth, natural rendition. Aliasing is an arti [..]

A type of digital image distortion most often seen when straight lines or edges in a digital image are enlarged to the point at which they appear jagged. Read articles that include this term

digital sampling requires the analogue signal to be sampled at twice the frequency of interest otherwise aliasing occurs. If the signal is not filtered to eliminate the high frequencies, they appear a [..]

A sampling effect that leads to spatial frequencies being falsely interpreted as other spatial frequencies.…

Pictures on your computer monitor are made up of square pixels. When the edge of a solid colored object in a GIF image is a diagonal or curved line, and it is displayed against a contrasting color, th [..]

In any technology or process involving (a) sampling a signal, e.g., an electrical signal or (a series of images of) a moving subject; (b) processing, storing, or transmitting representations of the samples; and (c) replicating the original signal from the representations: the production of artifacts as a result of sampling at intervals too great to [..]

Internet Glossary (1) In computer graphics, the process by which smooth curves and other lines become jagged because the resolution of the graphics device or file is not high enough to represent a smooth curve. Smoothing ant antialiasing techniques can reduce the effect of aliasing. (2) In digital sound, aliasing is a static distortion resulting fr [..]

When sampling an analogue signal, the sampling frequency must be at least twice that of the highest frequency component of the analogue signal (Niquist Frequency). If not, the sampling process is inac [..]

(1) In computer graphics, the process by which smooth curves and other lines become jagged because the resolution of the graphics device or file is not high enough to represent a smooth curve. Smoothi [..]

Visibly jagged steps along angled or object edges, due to sharp tonal contrasts between pixels.

An undesirable distortion component that can arise in any digitally encoded information (sound or picture).

In computer graphics, an undesirable effect--also known as “jaggies”--in which the edge of the image or letter is characterized by a stair-step appearance.

An effect caused by sampling an image (or signal) at too low a rate. It makes rapid change (high texture) areas of an image appear as a slow change in the sample image. Once aliasing occurs, there is no way to accurately reproduce the original image from the sampled image. Algorithm

Defects or distortions in a television picture due to sampling limitations. Defects are commonly seen as jagged edges or diagonal lines and a pulsing/brightening in picture detail.

 Distortion of an image file or sound recording due to insufficient sampling or poor filtering. Aliased images appear as jagged edges, aliased audio produces a buzz.

A phenomenon caused by sampling analogue data at too-low a frequency. It results in a digital reconstruction of the original signal at a false, lower frequency. This causes higher frequency signals to [..]

An undesirable side-effect of a sampling process. The most common example is visible pixels or jaggies when displaying a bitmap at low resolutions.

This is an effect caused by sampling an image at to low a rate. It causes rapid change (high texture) areas of an image to appear as a slow change in the sample image. Once this has happened, it is ex [..]

``false frequencies'' that are created when sampling frequencies greater than one-half the sampling rate.

 Unwanted frequencies produced when harmonic components in the audio signal being sampled by a digital recording device or generated within a digital sound source are above the Nyquist frequency. Alia [..]

a form of distortion that can occur during the analog-to-digital conversion of a signal. When the input signal sampled is more than one half the sampling rate, only part of the signal will be digitize [..]

The stair-stepped pattern in a bitmap image when the resolution is too low for the size of the output; also called “jaggies”.

Digital images are made up of square pixels and when the image is low resolution there are fewer pixels per inch. This creates a rough step-like appearance that is most noticeable on diagonal straight [..]

A digital artifact consisting of patterns or shapes that have no relation in size and orientation with those found in the original image. This is often caused by too low a scan resolution or sampling rate. The best solution is to acquire the image at a sufficient sampling rate or use an anti-aliasing algorithm.

A type of digital image distortion most often seen when straight lines or edges in a digital image are enlarged to the point at which they appear jagged. Read articles that include this term

Defects or distortions in a television picture due to sampling limitations. Defects are commonly seen as jagged edges or diagonal lines and a pulsing/brightening in picture detail.

The process by which smooth curves and lines that run diagonally across the screen of a low-resolution digital file take on a jagged look as opposed to looking smooth and natural.

Aliasing is an effect that causes different signals to become indistinguishable from each other during sampling. Aliasing is characterized by the altering of output compared to the original signal bec [..]

An image sampling error in digital systems manifesting itself as spatial frequency components beyond the sampling limit (Nyquist frequency) that are displayed at progressively lower frequencies. Aliasing can produce moiré pattern artifact in an image when the spatial frequency of the signal exceeds the sampling rate of the digitizer.

1. n. Allowing one memory location or register to be accessible at more than one address. Aliasing is a result of address decoding and often happens with peripheral control and status registers. For e [..]

A type of digital signal distortion that occurs in a sampler when the incoming signal frequency exceeds the Nyquist frequency for that unit. The sampler reproduces it at an incorrect frequency, or an [..]

The process by which frequencies too high to be analyzed with the given sampling interval appear at a frequency less than the Nyquist frequency.

1. <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. 2. <computer hardware> (Or "shadowing") Where a hardware device responds at multiple addresses because it only decodes a subset of the address lines, so differe [..]

<microscopy> A pattern of image sampling error in digital systems. Aliasing forces spatial frequency components higher than a critical value (the Nyquist frequency) to be displayed at progressively lower frequencies. Aliasing introduces an undesirable moire pattern when the spatial frequency of the signal exceeds the sampling rate in a digiti [..]

Visibly jagged steps along angled lines/edges (displays & maps).

The process by which frequencies too high to be analyzed with the given sampling interval appear at a frequency less than the Nyquist frequency.

An alias enables a single e-mail address to function as a distribution list. Mail sent to an alias is delivered to each mailbox defined in the distribution list.

A sampler mis-recognizing a signal sent to it that is at a frequency higher than the Nyquist Frequency. Upon playback, the system will provide a signal at an incorrect frequency (called an alias frequ [..]

An effect that occurs when an analog signal is sampled digitally at a rate that is less than twice the signal frequency. See Nyquist Sampling Rate. In any technology or process involving sampling a si [..]

There are a number of different kinds of aliasing that can occur in BIST engines. The most commonly discussed type of aliasing occurs when two faults have a canceling effect in the signature register. In other words, two wrongs appear to make a right. Two other forms of aliasing are zeroing and overcounting the LFSR. Zeroing refers to the occurrenc [..]