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====== Command Line Batch Image Processing with mogrify ======

To process a single file you can use ''convert''. For example, to reduce the quality of a jpg image you can run
  convert -quality 75 file.jpg
or
  mogrify -quality 75 file.jpg

However, to apply to same action to all the jpg images in a directory you have to run ''mogrify''. This tool is similar to convert except the original image file is overwritten with any changes. Batch convertion with mogrify is quite straightforward:
  mogrify -quality 75 *.jpg

If you want to run your batch operation recursively to all subdirectories you can run
  find . -name '*.jpg' -execdir mogrify -quality 75 {} \;

A list of all (more than 200!) convert/imagemagick options is available at [[http://www.imagemagick.org/script/convert.php|http://www.imagemagick.org/script/convert.php]]