Character recognition apparatus

Details Character recognition apparatus Character recognition apparatus

1977-10-31

1979-03-06

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

235449, G06K 918

Patent

active

041433564

ABSTRACT:
A magnetic character recognition system is disclosed for reading magnetized characters printed on a document such as a check, which system determines the magnitude and position of each of the peaks of an analog waveform representing each character read by a single gap magnetic read head. Means are provided for normalizing the peak amplitude by dividing the amplitude of each succeeding peak value by the amplitude of the first peak value read and generating a digital value representing the ratio of the succeeding peak values to the first value. Further means are provided for normalizing the peak position by determining the ratio of the position of each of the peaks within the waveform to the position of the first position peak of the waveform. The digital values of the normalized peak amplitude and position are then processed and compared with corresponding values of a plurality of reference characters to identify the character read. Threshold values are applied to insure a valid recognition operation.

REFERENCES:
patent: 3535682 (1970-10-01), Dykaar et al.
patent: 3744026 (1973-07-01), Wolff
patent: 3784792 (1974-01-01), Dobras
patent: 3879707 (1975-04-01), Rohrer

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