9 Oct 2017, Nathan has been working on dithering images

Dither on wikipedia

Dithering is used when displaying an image with a limited number of actual tones or colors (similar to half-toning in print). Early multimedia (like CD-ROMs and the first Macintosh) used dithering heavily to display images with the limited resources of these computer displays.

Had been using: TexTuring ... http://ivan-murit.fr/43-en.htm

Imagemagick has several dithering options:

http://www.imagemagick.org/script/command-line-options.php#dither http://www.imagemagick.org/Usage/quantize/#colors

convert colorwheel.png -dither None -colors 64 colors_64_no.gif convert colorwheel.png -dither Riemersma -colors 64 colors_64_rm.gif convert colorwheel.png -dither FloydSteinberg \ -colors 64 colors_64_fs.gif

THEN THERE'S also "ordered dithering" with even more options! wikipedia

Finally N created a script to resize an image and produce many variations based on differend dithering styles:


other links http://www.imagemagick.org/discourse-server/viewtopic.php?t=17700