White Noise in A Spatial Context
While it is usually applied in the context of frequency domain signals, the term white noise is also commonly applied to a noise signal in the spatial domain. In this case, it has an auto correlation which can be represented by a delta function over the relevant space dimensions. The signal is then "white" in the spatial frequency domain (this is equally true for signals in the angular frequency domain, e.g., the distribution of a signal across all angles in the night sky).
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Famous quotes containing the words white, noise and/or context:
“A tanned skin is something more than respectable, and perhaps olive is a fitter color than white for a man,—a denizen of the woods. “The pale white man!” I do not wonder that the African pitied him.”
—Henry David Thoreau (1817–1862)
“The noise of life begins again,
And ghastly through the drizzling rain
On the bald street breaks the blank day.”
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“Parents are led to believe that they must be consistent, that is, always respond to the same issue the same way. Consistency is good up to a point but your child also needs to understand context and subtlety . . . much of adult life is governed by context: what is appropriate in one setting is not appropriate in another; the way something is said may be more important than what is said. . . .”
—Stanley I. Greenspan (20th century)