Apparatus for converting image outline data into dot data repres

Details Apparatus for converting image outline data into dot data repres Apparatus for converting image outline data into dot data repres

1990-02-28

1991-09-17

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

340731, G06K 936

Patent

active

050502280

ABSTRACT:
A data converting apparatus for converting outline data representative of an outline of a character, into dot data including dot-forming bits each indicative of the presence of an image dot to be formed at a position of a corresponding dot-forming picture element which lies within the outline of each stroke of the character, so as to satisfy a predetermined requirement, when the outline of the character is superimposed on a pixel screen wherein picture elements are defined by x-axis pixel lines and y-axis pixel lines perpendicular to the x-axis pixel lines. The apparatus includes a device for determining whether or not a difference between an outline width of each character stroke as defined by the outline data and a reproduction width of the as reproduced according to the dot data as normally prepared based on the outline data exceeds a reference value. The normally prepared dot data are changed so as to reduce the difference between the outline and reproduction widths, if the difference exceeds the reference value.

REFERENCES:
patent: 3582887 (1971-06-01), Guthrie
patent: 3668638 (1972-06-01), Iijima et al.
patent: 3740743 (1973-06-01), Baron
patent: 3930251 (1975-12-01), Salava et al.
patent: 3999168 (1976-12-01), Findley et al.
patent: 4331955 (1982-05-01), Hansen
patent: 4897638 (1990-01-01), Kokunishi et al.

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