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Anisotropic noise

Some noise sources show up with a significant orientation in images.

Image noise is a random variation of brightness or color information in images and is usually an aspect of electronic noise. It can be produced by the sensor and circuitry of a scanner or digital camera. Image noise can also originate in film grain and in the unavoidable shot noise of an ideal photon detector. Image noise is an undesirable by-product of image capture that obscures the desired information.

The original meaning of "noise" was "unwanted signal"; unwanted electrical fluctuations in signals received by AM radios caused audible acoustic noise ("static"). By analogy, unwanted electrical fluctuations are also called "noise".

Some noise sources show up with a significant orientation in images. For example, image sensors are sometimes subject to row noise or column noise.

Key Terms

aspect electronic noise
circuitry
color information images
definition
image noise
noise
random variation brightness
scanner
sensor
usage

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Anisotropic noise
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Last modified on August 20 2019
Content adapted from Wikipedia
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