Average Resolution - Computes the average, min and max height/width of all images passed as arguments

avgres.sh

#!/usr/bin/env bash

if [ "$#" -lt 1 ] || [ ! -f "$1" ]; then
    echo "Usage: $0 1.jpg 2.jpg ..."
    exit 1
fi

sizes=$(identify -format "%h %w\n" "$@" | awk -F ' ' '(NR==1){minh=$1;minw=$2;maxh=$1;maxw=$2}; (NR>0){if(minh>$1) minh=$1; if(maxh<$1) maxh=$1;if(minw>$2) minw=$2; if(maxw<$2) maxw=$2;}; {height += $1} {width += $2} END {print height/NR; print width/NR; print maxh; print minh; print maxw; print minw;}')

h=$(echo "$sizes" | sed -n 1p)
w=$(echo "$sizes" | sed -n 2p)

maxh=$(echo "$sizes" | sed -n 3p)
minh=$(echo "$sizes" | sed -n 4p)

maxw=$(echo "$sizes" | sed -n 5p)
minw=$(echo "$sizes" | sed -n 6p)

echo -e "\tMin\tAvg\tMax"
echo -e "Height\t${minh}\t${h}\t${maxh}"
echo -e "Width\t${minw}\t${w}\t${maxw}"