Error diffusion

Sierra two-row dithering

Sierra two-row drops the third row of the full Sierra kernel. Results stay close to the original, a little faster.

Good for general use.

How it decides

         #  4  3
   1  2  3  2  1      ÷ 16

Seven neighbours, one row ahead.

This runs in your browser. Change the algorithm, the number of cells or the threshold, or put a second algorithm next to it.

Sierra two-row

Algorithm Compare with Cells across 96 Threshold 0.50 Serpentine scan Tone

Rendered in 0.0 ms on your machine. Every dot here is what a pen or laser would put down.

Every one is an option in the Dither style: dither an image online and export a 1-bit PNG for a laser or SVG dots for a plotter.