picture black
Telecommunications
In TV and facsimile, pertaining to the signal or signal level that corresponds to the darkest part, i.e., the spot with the lowest luminance or reflectivity, of the object being scanned.
In TV and facsimile, pertaining to the signal or signal level that corresponds to the darkest part, i.e., the spot with the lowest luminance or reflectivity, of the object being scanned.