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.

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Adapted from content published on wikipedia.org
Last modified on August 20, 2019, 11:12 pm
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