I'm trying to create an Automator folder action to automatically crop images that are added to a specific folder. It works; however, it crops the images towards the center. How can I crop starting from the right edge? I found Propper Cropper, which looks like it does what I need, but unfortunately it was compiled for PPC, and is therefore not a universal action. Is there an alternative (preferably an Automator action)? If this is not possible with Automator, is there some other software I can download to achieve this?


Install Homebrew and then install ImageMagick with brew install imagemagick.

for f in "$@"; do
    # mogrify when file is a png or file is a jpg image
    [[ "$f" != *.png && "$f" != *.jpg ]] && continue
    /usr/local/bin/mogrify -crop 50x50+0+0 "$f"
  • -crop 50x50+0+0: crop from the top left corner, create only one image
  • -crop 50x50+0+0 -gravity SouthEast: crop from the bottom right corner
  • -resize 160x90^ -gravity center -extent 160x90: make images smaller or bigger and crop them so that they fill the specified area
  • -crop '-50-50' -crop '+50+50': crop 50 pixels from all sides

See http://www.imagemagick.org/Usage/resize/ for more examples.

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