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

1989-10-23

1991-12-17

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 13, 382 23, 382 56, 3582611, 358426, G06K 900

Patent

active

050739565

ABSTRACT:
Apparatus including a device for calculating coordinate values of intersections between the image outline and parallel scanning lines which are superimposed on each other in a coordinate system, and a device for storing the calculated coordinate values such that the values for each scanning line are arranged in order of the magnitude of the values and adjacent two of the ordered values are paired as a pair of coordinate values. The apparatus further includes a device for preparing a batch of dot data indicative of the dots to be formed in corresponding picture elements positioned in the coordinate system. The dot data is prepared such that successive bits of the dot data corresponding to successive picture elements consisting of two picture elements represented by the above-indicated pair of coordinate values and at least one picture element between these two picture elements are set at one time such that each of the successive bits indicates a dot to be formed in the corresponding picture element.

REFERENCES:
patent: 4673977 (1985-06-01), Stelzenmuller
patent: 4727588 (1988-02-01), Fox et al.
patent: 4771474 (1988-09-01), Takashima et al.
patent: 4837847 (1989-06-01), Shirasaka et al.

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