make difference data.

MakeDiffs.sh

#!/usr/bin/env zsh

if [ $# -ne 2 ]; then
    echo "$# args specified" 1>&2
    echo "usage: sh ./makeDiffs.sh marker_directory target_directory" 1>&2
    echo "caution! : the subdirectories of target_directory must be same the marker_directory's subdirectories."
    exit 1
fi

for marker in $1/**/*.png
do
    ./diffs.sh $marker ${${marker%/*}/$1/$2} > ${${marker##*/}/.png}.txt
done