Make pseudo-HDR photo from a bunch of input JPEGs using GraphicsMagick, ImageMagick, pfsalign, enfuse and bash

pseudohdr2

#!/bin/bash

INS=("$@")
OUTNAME="${INS}_${INS[${#INS[@]}-1]}.png"

# 1. Sort images in order of increasing brightness

declare -a LEVS
for i in "${INS[@]}"; do 
    LEVS+=($(
            gm convert -quality 0 "$i" png:- | 
            convert png:- -scale 1x1 txt: |
            perl -ne '/^\s*0\s*,\s*0\s*:\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)[0-9,\s.]*\)/ and print $1+$2+$3,"\n"'
            ))
done

ORDER=($(echo "${LEVS[@]}" | tr ' ' '\n' | nl -v 0 -p -ba -s ' ' -w 1 | sort -k2 -n | awk '{print $1}'))

declare -a SORTED_INS

for i in ${ORDER[@]}; do
    SORTED_INS+=("${INS[$i]}")
done

TIFFS=("${SORTED_INS[@]/%/.tiff}")

echo Sorted ins: "${SORTED_INS[@]}"
echo Sorted tiffs: "${TIFFS[@]}"

# 2. Align images
pfsin "${SORTED_INS[@]}" | pfsalign -v --crop=min -s 8 -f | pfsouttiff "${TIFFS[@]}"

# 3. Enfuse
enfuse --output=$OUTNAME "${TIFFS[@]}"