Well, I've concluded that it doesn't work!
However, the obvious solution to this is to split the colour channels and do the dithering separately, then combine again:-This gives me the result I was looking for. ![:D]( "Very Happy")
http://www.violae.net/temp/48to24dither.jpg
However, the obvious solution to this is to split the colour channels and do the dithering separately, then combine again:-
Code:
magick image24.png -resize 4096x2048 -define png:format=png48 png48:image48.pngmagick image48.png -blur 3x9 -depth 16 -define png:format=png48 png48:image48b.pngmagick image48b.png -motion-blur 33x33+90 -depth 16 -define png:format=png48 png48:image48c.pngmagick image48c.png -channel R -separate -depth 16 -define png:format=png48 png48:image48c_red.pngmagick image48c.png -channel G -separate -depth 16 -define png:format=png48 png48:image48c_grn.pngmagick image48c.png -channel B -separate -depth 16 -define png:format=png48 png48:image48c_blu.pngmagick image48c_red.png -dither riemersma -colors 255 image48c_red2.pngmagick image48c_grn.png -dither riemersma -colors 255 image48c_grn2.pngmagick image48c_blu.png -dither riemersma -colors 255 image48c_blu2.pngmagick image48c_red2.png -resize 2048x1024 -define png:format=png24 png24:image48c_red3.pngmagick image48c_grn2.png -resize 2048x1024 -define png:format=png24 png24:image48c_grn3.pngmagick image48c_blu2.png -resize 2048x1024 -define png:format=png24 png24:image48c_blu3.pngmagick image48c_red3.png image48c_grn3.png image48c_blu3.png -combine -set colorspace sRGB -define png:format=png24 png24:image48d!!!.png
http://www.violae.net/temp/48to24dither.jpg
Statistics: Posted by LDAsh — 2020-11-08T21:49:16-07:00