most image editing software on android doesn't do
what i want, so i set up imagemagick on my phone
instead.

- install tmux
- give file access permissions to tmux.
- in tmux: pkg install imagemagick
- ln -s /storage/emulated/0 ~/root
- touch ~/root/Documents/images.txt
- mkdir ~/root/DCIM/magick

then in a file called ~/pixelize.sh i have:

in_dir="~/root/Documents"
out_dir="~/root/DCIM/magick"

while read line; do
	magick "$line" -resize 400x \
	-dither FloydSteinberg \
	-colors 16 \
	$out_dir/$(basename "$line").gif
	done<$in_dir/images.txt

then, using my file browser, I copy the full path
of each image i want to edit, and put them (each
on a new line) in

/storage/emulated/0/Documents/images.txt

then I open tmux and run ./pixelize.sh

it looks at images.txt and edits each file,
outputting them in DCIM/magick/.

anyway, that's all for today.

26-07-18