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Glite Dictionary
🖼️ Visual distortion 🕵️ Using a false name 💻 Shared memory
aliasing

aliasing

1 9.0
A distortion in images or sound that makes edges jagged and recordings sound harsh when saved with low detail
  • noun
  • /ˈeɪliəsɪŋ/
  • Specialized
translation icon : aliasing
  • The number of samples was chosen to minimize aliasing in the impulse response while keeping a reasonable computational burden.

And in particular, the interest was in suppressing high frequency content so that we can sample them without getting aliasing artifacts.

Examples

  • I am going to do a little demo on aliasing today that I didn't want you to miss.

  • Low-pass digital signal processing avoids aliasing for smooth, accurate results.

    Academic text (2011)

  • That blur, that aliasing, the lack of any definition.

    Blog text (2)

  • Low-resolution image sensors have a problem called "color aliasing" that occurs when a spot of light in the original scene is only big enough to be read by one or two pixels.

    Academic text (2001)

  • Sure, there may be some aliasing and moiré seen under specific conditions, but that is predictable and can be controlled.

    Blog text (14)

  • Consequently, film seldom has the aliasing problems we associate with periodic spatial sampling of a visual scene with comparable spatial periodicity.

    Academic text (1992)

  • One also gets moiré patterns and other such aliasing artifacts when the spatial frequency of the scene exceeds the sampling frequency of the pixel array.

    Academic text (1992)

  • The aliasing and color gradients on a screen like this just do not work in HD.

  • Low-pass digital signal processing avoids aliasing for smooth, accurate results.

  • Low-resolution image sensors have a problem called "color aliasing" that occurs when a spot of light in the original scene is only big enough to be read by one or two pixels.

Synonyms

distortion
vsaliasing
  • Specialized
53 6.7

A change in a sound or electrical signal that makes the sound wrong

is the sampling related case that creates jagged effects in signals
artifact
vsaliasing
  • Specialized
12 7.2

A strange error in a photo, video or audio file caused by processing

is a specific error caused by low resolution sampling producing jagged visual or audio effects

How Distorted

aliasing
  • Specialized
1 9.0
artifact
  • Specialized
12 7.2

Surface Forms

aliasing singular
aliasings plural

Morphology

aliasing = alias (opaque) = alias + ing

The form is built from 'alias' + '-ing', but the signal-processing meaning is a specialized metaphor and is not readily recoverable for most learners.

Etymology

The word aliasing comes from alias, a word that means 'other' or 'another name'. In images or sound, a real detail can appear as a false 'other' shape or tone when the picture or sound is recorded with too little detail, so aliasing is the wrong or 'other' version of the original signal.