central-symmetry.sh

central-symmetry.sh

#!/bin/bash

W=`identify ./large.jpg | cut -f 3 -d " " | sed s/x.*//` #width
H=`identify ./large.jpg | cut -f 3 -d " " | sed s/.*x//` #height


if [[ $W > $H ]]; then
  NW=$H;
else
  NW=$W;
fi

convert large.jpg -crop ${NW}x${NW}+$((W-NW))+$((H-NW)) cube-right.jpg
convert cube-right.jpg -sparse-color voronoi '%w,0 white 0,%h black'  mask-right.png;
convert cube-right.jpg \( +clone -transpose \) mask-right.png  -compose Src -composite   mirror-right.png

convert large.jpg mirror-right.png -geometry +$((W-NW))+$((H-NW)) -composite right.jpg

convert large.jpg -crop ${NW}x${NW}+0+0 cube-left.jpg
convert cube-left.jpg -sparse-color voronoi '0,%w white %h,0 black'  mask-left.png;
convert cube-left.jpg \( +clone -transpose \) mask-left.png  -compose Src -composite   mirror-left.png

convert large.jpg mirror-left.png -geometry +0+0 -composite left.jpg

convert large.jpg mirror-left.png -geometry +0+0 -composite mirror-right.png -geometry +$((W-NW))+$((H-NW)) -composite render.jpg

exit 0;

#convert cube.jpg \( +clone -flop -chop 1x0 \) +append \  \( +clone -flip -chop 0x1 \) -append \ kaleidoscope.png