Sample Images to number of pixels using ImageMagick

magick_sample_images_to_pixels.sh

#!/bin/bash

dir=$1
let max='1900000'

cd $dir
 
for file in `ls $dir`
do

  echo "Looking at $file"

  geometry=`identify $file | awk '{print $3}'` 
  width=`echo $geometry | sed 's/[^0-9]/ /g' | awk '{print $1}'`
  height=`echo $geometry | sed 's/[^0-9]/ /g' | awk '{print $2}'`

  let pix=$width*$height

  if [ $pix -gt $max ]; then

	echo "Resizing $file"
	mogrify "$file" -sample @$max "$file"

  fi

done