Resize images in directory

Question

I have a directory full of images that I would like to resize to around 60% of their original size.

How would I go about doing this? Can be in either Python or Perl

Answer 1

Can it be in shell?

mkdir resized
for a in *.jpg; do convert "$a" -resize 60% resized/"$a"; done

If you have > 1 core, you can do it like this:

find . -maxdepth 1 -type f -name '*.jpg' -print0 | xargs -0 -P3 -I XXX convert XXX -resize 60% resized/XXX

-P3 means that you want to resize up to 3 images at the same time (parallelization).

If you don't need to keep originals you can use mogrify, but I prefer to use convert, and then rm ...; mv ... - just to be on safe side if resizing would (for whatever reason) fail.