Method of assigning direction code to boundary picture element i

Details Method of assigning direction code to boundary picture element i Method of assigning direction code to boundary picture element i

1982-09-14

1985-06-18

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

G06K 948

Patent

active

045244545

ABSTRACT:
A method applicable to a character recognition system is disclosed which assigns direction codes to a number of boundary picture elements contained in a two-level character pattern. The direction of connectivity of a boundary picture element observed is fractionized to minimize the error due to the quantization of the direction. The direction codes are converted into those which correspond to connectivity directions which should be finally grasped. Such direction codes allow strokes to be extracted quite faithfully to the original character pattern.

REFERENCES:
patent: 3609685 (1971-09-01), Deutsch
Freeman, "Computer Processing of Line-Drawing Images", 1974, pp. 58-99.

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