Dot placement technique for speed optimization of raster printin

Details Dot placement technique for speed optimization of raster printin Dot placement technique for speed optimization of raster printin

1990-10-11

1991-12-31

Evans, Arthur G.

Image analysis

Histogram processing

For setting a threshold

382 55, G06K 1500

Patent

active

050776797

ABSTRACT:
Method and abstract for preparing pen-stroke image information for print on a raster-type output device. The image is first vectorized according to a slope classification technique which designates dots of a vector for print in repeating patterns depending on the slope class of the vector, in a manner which optimizes print speed without loss of print quality. In a novel post-processing step, the print data is scanned along a print line and any dot which is designated for print at a dot position less than or equal to s/2 dot positions beyond the previous dot designated for print is eliminated, and any dot designated for print more than s/2 dot positions from the previous dot position by less than s dot positions beyond the previous dot position is moved to s dot positions beyond the previous dot position, where s is the maximum distance apart at which two dots can be printed without loss of quality.

REFERENCES:
patent: 4809345 (1988-02-01), Tabata et al.
patent: 4881069 (1989-11-01), Kameda et al.
patent: 5016195 (1991-05-01), Warp

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