ImageMagick photo collage

im_merge.sh

#!/bin/bash
# By Jackson Ming Hu, 2017
# Users should rename and their photos to some paths with digit, e.g. ./0/foo.jpg, ./0/bar.jpg

for i in {2..10}
do
    echo "Converting $i.jpg..."
    convert ./$i/*.jpg -geometry +3+3 -border 2%x1% -bordercolor White -gravity Center -resize 50% -quality 85 -append $i.jpg
done