Use ImageMagick to filter out overly dark photos

removeDark.sh

#!/bin/bash

# Simple script used for filtering out photos taken on a timelapse camera
# Used in conjuction with [removeBlurry.sh](https://gist.github.com/JoshM1994/8ab288466500c26e7fcc62a388249abe)

mkdir -p tooDark

for f in `ls | sort -Vr`; do
	AVG=$(convert $f -colorspace HCL -format '%M  avg=%[fx:mean.g*1000] peak=%[fx:maxima.g]\n' info: | awk 'END {print $2}')
	AVG=${AVG:4:5}
	ISOK=$(echo "${AVG} > 1" | bc)
	if [ ${ISOK} -eq 0 ]
		then
		echo "Moving $f"
		mv $f tooDark/
	fi
done