imagemagick quick notes

imagick-notes

function im-lowdepth {
# use imagemagick to lower the color depth of an image
# convert madmen_s04.jpg -depth 08 -colors 16 madmen_s04_d08_c16.jpg
FILEIN="$1"
filename=$(basename "$FILEIN")
extension="${filename##*.}"
filename="${filename%.*}"

for i in 08 16 32 64 
  do
  convert ${FILEIN} -depth 8 -colors ${i} ${filename}_d08_c${i}.${extension}
done
}

function im-lowres {
# use imagemagick to lower the resolution of an image
# while keeping it the same dimensions
# TODO
# identify -format "%w x %h %x x %y\n" seiko_lv_submariner_yobokies.jpg
# $ convert seiko_lv_submariner_yobokies.jpg -resize 400x300 output.jpg
# $ convert output.jpg -resize 800x600 output1.jpg
# $ for i in seiko_lv_submariner_yobokies.jpg output.jpg output2.jpg  ; do identify -format "%w x %h %x x %y\n" $i ; done
# 800 x 600 180 x 180
# 400 x 300 180 x 180
# 800 x 600 18 x 18
# this is not exactly what i'm looking for, maybe combined with lowering color depth

FILEIN="$1"
filename=$(basename "$FILEIN")
extension="${filename##*.}"
filename="${filename%.*}"

identify -format "%w x %h %x x %y" ${FILEIN}

}