Picture image discriminating apparatus

摘要

A picture image discriminating apparatus which operates for scanning a document and transmitting a picture signal obtained through converting a light signal photoelectrically at every unit reading size of 0.01 mm2 or over to a signal processing division for picture image discrimination by a peak interval of a time series output of the picture signal. The picture image discriminating apparatus has a differentiating circuit to differentiate a time series output of the picture signal obtainable according to the light signal, a binary-coding circuit to compare an output signal from the differentiating circuit with a specific level and output a binary pulse signal, and a counter to count an output pulse from the binary-coding circuit.