System for scanning and identifying standardised characters at h

Details System for scanning and identifying standardised characters at h System for scanning and identifying standardised characters at h

1974-01-15

1976-01-20

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

3401463MA, G06K 912

Patent

active

039342255

ABSTRACT:
This invention relates to a system for scanning and identifying characters in a document carrying a text made up of equidistant parallel lines of equal length placed one below another, some lines possibly being blank. The system includes means for scanning the text in successive transverse sweeps during each of which a transverse band covering a small number of lines of writing is scanned. The document is movable relative to the fixed position of the band so that, between one transverse sweep and the next, each line of writing comes into substantially the same position as the line before. Each band is itself scanned at a frequency T in J equidistant columns, each of said columns being divided into a number N of small areas which form a line. The said scanning means supplies N electrical signals formed by a "0" or a "1" which correspond respectively to the whites and blacks and vice versa in the text.

REFERENCES:
patent: 3346845 (1967-10-01), Fomenko

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