Comments on: Batch Resize a Group of Pictures from the Command Line with sips

By: diselsamm

diselsamm — Mon, 26 Nov 2012 18:17:20 +0000

Another possible solution is to use Gimp, an excellent free software.

By: Lauri Ranta

Lauri Ranta — Mon, 26 Nov 2012 10:06:46 +0000

sips (and Preview and Automator) make images fairly blurry though. ImageMagick allows choosing from different interpolation filters and adding sharpening manually. It also has more resizing and cropping options.

This would make images 50% smaller and convert them to JPG:

mogrify -filter lanczos2 -resize 50% -format jpg -quality 92 -path ~/Desktop/ *.png

By: nlapjr

nlapjr — Mon, 26 Nov 2012 05:42:36 +0000

Thanks! Great help!
Maybe you can feature more Automator tips and tricks.
That app has a lot of potential but is not covered much.

By: pr10n

pr10n — Mon, 26 Nov 2012 03:34:33 +0000

I’ve been using SIPS for goodness knows how long. I like adding a little spotlight love to it so I can recursively hunt down images that are larger than my target size.

mdfind -0 -onlyin . “kMDItemPixelHeight > 620 || kMDItemPixelWidth > 620″ | xargs -0 sips -Z 620

By: Dante

Dante — Sun, 25 Nov 2012 20:16:48 +0000

Good tip, but I would add another step that is making a copy of the pictures that you want to resize. That way you can still have the original dimension pictures available too.