Halftone characteristic
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In telecommunication, the term halftone characteristic has the following meanings:

1. In facsimile systems, the relationship between the density of the recorded copy and the density of the object, i.e., the original.
2. In facsimile systems, the relationship between the amplitude of the facsimile signal to either the density of the object or the density of the recorded copy when only a portion of the system is under consideration.

Note: In an FM facsimile system, an appropriate parameter other than the amplitude is used.

See also: halftone

Source: from Federal Standard 1037C and from MIL-STD-188

The original article can be found at: http://en.wikipedia.org/wiki/Halftone_characteristic.
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