Useful Noise
High levels of noise are almost always undesirable, but there are cases when a certain amount of noise is useful, for example to prevent discretization artifacts (color banding or posterization). Some noise also increases acutance (apparent sharpness). Noise purposely added for such purposes is called dither; it improves the image perceptually, though it degrades the signal-to-noise ratio.
Read more about this topic: Image Noise
Famous quotes containing the word noise:
“There is something terribly wrong with a culture inebriated by noise and gregariousness.”
—George Steiner (b. 1929)
“And its noise as the noise in a dream; and its depth as the roots
of the sea:”
—A.C. (Algernon Charles)
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