| the dimension along a scanning line of the smallest recognizable detail of the image produced by the shortest signal capable of actuating a facsimile receiver under specified conditions
NOTE 1 – In phototelegraphy, the longitudinal and transverse dimensions of the finest detail correspond to those of the picture element.
NOTE 2 – In document facsimile, the longitudinal resolution is determined by the length of the line produced by the shortest nominal black or nominal white signal capable of actuating the receiver.
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