JPS56137479A - Pattern comparison and processing device - Google Patents

Abstract

PURPOSE:To enable to discriminate the propriety of printed characters instantly with low cost, by reading in and collating the pattern information like characters to be checked and the pattern information like reference characters in the same timing. CONSTITUTION:When the one dimensional line sensor 30 comes on the defective print T of the printed character Q, the amount of light of the photoelectric conversion element 34 is deficient into low level photosignal, and it is fed to the binary circuit 52 via the gate circuit 64 and the output is at low level. On the other hand, since the primary dimensional line sensor for the reference character S shows normal photoreception, the photosignal of high level is fed to the binary circuit 53 in the same timing to output high level signal. The output signals of the binary circuits 52, 53 are compared at the comparison circuit 54 to output disagreement signal 1. In other parts, since the inputs of the comparison circuit 54 are in agreement, the output signal is at 0. The disagreement signal 1 is output to the display circuit 57, the alarm lamp 59 is illuminated for alarming.