A common resolution enhancement technique is to vary the size of the dots.
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A collection of techniques used in many laser printers to enable the printer to print at a higher resolution than normal. Most laser printers have printer engines that print at either 300 dpi (dots per inch) or 600 dpi. Using clever algorithms that recognize curved lines, a printer with resolution enhancement can produce output whose resolution appears to be much higher than the print engine’s rated resolution. This is why many printer manufacturers characterize their printers with two resolution ratings: the engine resolution and the effective resolution.
