Discriminator between handwritten and machine-printed characters

Details Discriminator between handwritten and machine-printed characters Discriminator between handwritten and machine-printed characters

1988-04-18

1990-03-20

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 9, 382 18, 382 24, G06K 946

Patent

active

049107879

ABSTRACT:
A video image of a region including characters recorded on a document is converted into electric signals. From the electric signals unit signals corresponding to subregions obtained by dividing the region is picked up. Horizontal, vertical and slanted stroke components included in each of the subregions are detected from the unit signals. The detected numbers of the horizontal, vertical and slanted stroke components are counted. The ratio of the counted numbers of the slanted stroke component to the total of the horizontal, vertical and slanted stroke components is calculated. The characters on the document is judged as handwritten ones and machine-printed ones if the ratio is above and not above a predetermined threshold, respectively. The threshold is preferably set at 0.2.

REFERENCES:
patent: 4379283 (1983-04-01), Ito et al.
patent: 4516262 (1985-05-01), Sakurai
patent: 4630307 (1986-12-01), Cok

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