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Blue Noise

What Does Blue Noise Mean?

Blue noise increases in volume with increasing frequency, but at a lower rate than a similar kind of noise called violet noise.

Blue noise is also known as azure noise.

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Techopedia Explains Blue Noise

Blue noise is one of many terms for different kinds of noise that operate differently across the noise frequency spectrum. Blue noise is characterized as a noise with a less intense frequency increase than purple noise. It can also be contrasted to pink noise, where intensity decreases by a similar margin over a finite frequency range. That relative increase and decrease is 3 decibels per octave.

In terms of its use, blue noise is sometimes used for randomization or pattern projection, such as in digital images utilizing or transitioning from grayscale. For example, a strategy called dithering is used in audio and video processes to help to project different changes to images. Blue noise can be useful in dithering because of its logarithmic function.

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Synonyms

Azure Noise

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