yimity · December 11, 2020 01:13 · yimity · Dec 11, 2020
diff --git a/combine.sh b/combine.sh
 #!/usr/bin/bash
 echo "processing $1 and $2"
 PNG0=$1 ## png0 <----- first image should be the BLACKEST
 PNG1=$2 ## png1 <----- second image should be the WHITEST
 #PNG2=$3 ## png2 <----- third - todo - this could be an opaque fg with tranparent bg
 bg_size=`identify -format '%wx%h' "$1"`
 #echo "bg is $bg_size" 
 magick convert $PNG1 -resize $bg_size $PNG1
 magick convert $PNG0 -channel RGBA -matte -colorspace gray -normalize -ordered-dither o8x8 gray_$PNG0
 magick convert $PNG1 -channel RGBA -matte -colorspace gray -normalize -ordered-dither o8x8 gray_$PNG1
 # set transparencies
 magick convert gray_$PNG0 -fuzz 20% -transparent white t_$PNG0
 magick convert gray_$PNG1 -fuzz 20% -transparent black t_$PNG1
 # set white to transparency
 magick composite -dissolve 30x30 -gravity South "t_$PNG1" "t_$PNG0" -alpha Set combined.png
 rm $PNG0 $PNG1 gray_$PNG0 gray_$PNG1 t_$PNG0 t_$PNG1
	#!/usr/bin/bash
	echo "processing $1 and $2"
	PNG0=$1 ## png0 <----- first image should be the BLACKEST
	PNG1=$2 ## png1 <----- second image should be the WHITEST
	#PNG2=$3 ## png2 <----- third - todo - this could be an opaque fg with tranparent bg
	bg_size=`identify -format '%wx%h' "$1"`
	#echo "bg is $bg_size"
	magick convert $PNG1 -resize $bg_size $PNG1
	magick convert $PNG0 -channel RGBA -matte -colorspace gray -normalize -ordered-dither o8x8 gray_$PNG0
	magick convert $PNG1 -channel RGBA -matte -colorspace gray -normalize -ordered-dither o8x8 gray_$PNG1
	# set transparencies
	magick convert gray_$PNG0 -fuzz 20% -transparent white t_$PNG0
	magick convert gray_$PNG1 -fuzz 20% -transparent black t_$PNG1
	# set white to transparency
	magick composite -dissolve 30x30 -gravity South "t_$PNG1" "t_$PNG0" -alpha Set combined.png
	rm $PNG0 $PNG1 gray_$PNG0 gray_$PNG1 t_$PNG0 t_$PNG1