Trim surrounding whitespace from pictures

whitespace_trimmer

#!/bin/bash

if [ -z "$1" ]
then
  exit 1
fi

cd "$1"

cropImage() {
	filename="$1"
	fuzz="$2"
	rotation="$3"
	rotation=$[rotation * 90]

	convert "$filename" -bordercolor white -border 20x10 +repage -fuzz $fuzz% -trim -rotate $rotation "$filename".bak
	if [ $? == 130 ]
	then
		cropImage $file $[fuzz - 10] $rotation
	fi
}

for file in *.jpg
do
	for i in 1 2 3 4
	do
		cropImage "$file" 80 $i
	done

	mv "$file".bak "$file"
done