Apparatus for rasterizing image data in outline form

Details Apparatus for rasterizing image data in outline form Apparatus for rasterizing image data in outline form

1992-12-22

1996-06-18

Bayerl, Raymond J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358530, G06K 1500

Patent

active

055287336

ABSTRACT:
Image data in outline form is automatically converted into a bit map for a reproduction means, using the half bitting effect for more accurate positioning of image boundaries. The pixels are divided up into strips each associated with an effective boundary line position and a half bit pattern by means of which the effective boundary line position can be reached. These strips are so selected that a point within the strip is situated closer to the associated effective boundary line position than to the pixel boundary or to another effective boundary line position. For pixels which are intersected by the outline, a check is made as to whether the outline extends entirely within such a strip and the pixels which satisfy this condition are given a value in accordance with the associated half bit pattern if they are flanked by at least one other pixel satisfying the same condition.

REFERENCES:
patent: 4965749 (1990-10-01), Straayer
patent: 5146547 (1992-09-01), Beck et al.
patent: 5255351 (1993-10-01), Takanashi et al.
patent: 5261046 (1993-11-01), Shope et al.
patent: 5265196 (1993-11-01), Haneda
patent: 5335316 (1994-08-01), Toyokura
patent: 5361330 (1994-11-01), Fujisaki et al.
IBM Technical Disclosure Bulletin, vol. 20, No. 4, Sep., 1977, New York, pp. 1578-1580 by M. Brandon: "Modified Algorithm For Raster Scan CRT Display".

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