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.