there will be a series of schwu00e4chungseinrichtung indicated a weakening of the hochfrequenzkomponente of bildsignals, a first vergleichseinrichtung, the dichtewert of bildsignals, hochfrequenzkomponente has weakened, with a first reference value are compared, the first klassifizierungseinrichtung the image signal in a schriftzeichenbild and a tonbild,based on the signalausgang from the first vergleichseinrichtung classified, a measuring device for measuring the length or area of the tonbild bildsignals classified as a second vergleichseinrichtung, the length or area of the bildsignals as measured by the meu00dfe thanks to a second reference value are compared.the reference length of the bezugsbereiches is attached, and a second klassifizierungseinrichtung which, also in the second reference image signal from the image signal of the second vergleichseinrichtung as schriftzeichensignals classified.this series is the playback in a elektrographischen, digital kopiervorrichtung improve.
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