This script generates 45° angled Halftone Ordered Dither Threshold Maps of arbitrary size for ImageMagick 7. See the ImageMagick documentation.
Visualizations of each map are provided in the svg directory.
To use the pre-generated maps, copy the contents of thresholds.xml into ImageMagick's thresholds.xml file, which can be found on windows in your installation directory, and on Linux under ~/.magick/thresholds.xml. DO NOT OVERWRITE THE CONTENTS OF THE FILE, JUST APPEND THE NEW MAPS.
After saving ImageMagick's thresholds.xml file, you can now apply the maps using the specified names (map="h12x12a" etc.). For example:
magick input.png -colorspace Gray -ordered-dither h12x12a output.png
To use the script yourself to generate maps with different sizes than provided, adjust the range on line 118 of the script and run it.