Abstract: In a printed matter identifying apparatus of the present invention, the light source illuminates the detecting fields of the note. The reflected light-waves from the detecting fields are lead to the light receivers through the focusing lenses, the diffusion plates, the optical slits, the light conducting paths and red color transmitting and blue color transmitting filters. The output signals from the light receivers are amplified by the amplifiers and sampled by the sampling circuits. Among the sampled color component signals, the red component signals are applied to the subtracter to produce the red component difference signal and the blue component signals are applied to the adder to produce the blue component sum signal. These different signal and sum signal are applied to the comparators respectively and compared with the reference signals read out from the memory. The output signals from the comparators are supplied to the judgment circuit where the judgment of the printed matter is performed.

Abstract: A pattern discriminating apparatus with an interval integrating section for integrating detection signals from a detecting section for each of a number of intervals of a bill. A bill is supplied to the detecting section which detects, for example, a magnetism pattern of the bill. The detection signal from the detecting section is supplied to the interval integrating section as well as to a total integrating section. The total integrating section integrates the detection signals for one bill. The signals from the interval integrating section are temporarily stored in a memory section, are supplied to a smoothing section, and are smoothed thereby. The smoothed signal is supplied to normalizing section to be normalized based on the signal supplied from the total integrating section. The normalized signal and a signal output from a pattern memory section are supplied to a subtracting section for taking the difference between these two signals for each of the intervals.