Resize and recompress pngs

resize.sh

#!/bin/bash
for image in *.png
do
  width=$(identify -format '%w' $image)
  height=$(identify -format '%h' $image)
  cp $image $image.original
  if [ $width -gt 350 ]
  then
    echo "$image - width: $width height: $height"
    # Resize to 350px width keeping aspect ratio
    convert $image -verbose -resize 350 $image
  fi
  # Recompress all images without losing much quality stripping metadata
  pngquant --strip -f --ext .png --quality 70-95 $image
  if [ $? -eq 99 ]
  then
    echo "pngquant skipped $image"
  fi
done