jw-pkg/scripts/convert-to-greyed-out-image.sh

#!/bin/sh

in=$1
if [ "$2" ]; then
	out="$2"
else
	out=`echo $1 | sed 's/\.\([^.]\+$\)/-greyed-out.\1/'`
fi

#convert -monochrome $in $out
#convert -monochrome -opaque \#e5e5e5 $in $out
#convert -modulate 100,40 $in $out
#convert +level 25% $in $out
#convert +level 30% $in $out
#convert -colorspace Gray $in $out
#convert +level 30% -colorspace Gray $in $out
convert -colorspace Gray +level 30% -brightness-contrast 35 $in $out


# TODO: overlay same image, 1px shifted down and right, with different gray level

# ------------------------------------------------
#convert small.miff -modulate 100,40 small-grey.miff
#montage -fill black -font $P/LucidaGrande.ttf -pointsize 10 -geometry +0+0 -label "${LABEL}" -background transparent small-grey.miff  small-text.png
#composite -size 48x48 xc:$BGCOL -compose copy small-text.png  mask.miff
#composite small-text.png -compose atop  mask.miff   apmask.miff

# ------------------------------------------------
#convert $in \( +clone -background black -shadow 75x0+0-5 \) \
#  \( -clone 0 -alpha off -virtual-pixel black -motion-blur 0x3-90 -alpha on \) \
#  -delete 0 -background none -layers merge +repage $out