Resizes images so that the shortest side is 250px

image-resizer.sh

#!/bin/bash

# change this to the path where you have the images stored
src_path='/Users/tzayad/Pictures/test'; cd $src_path

# change this to the length you want for the smallest side
t_size=250;

# for each image of the type jpeg/jpg/gif/png loop through and resize
for img in `find . -iname \*.jpeg -o -iname \*.jpg -o -iname \*.png -o -iname \*.gif`; do

	# grab the height and width
	h=`sips -g pixelHeight $img | tail -1 | sed "s/.* //"`;
	w=`sips -g pixelWidth $img | tail -1 | sed "s/.* //"`;
	
	# decide which is the shortest side to get the factor to scale by
	if [[ $w -lt $h ]]; then
		scale=`echo "(($h*$t_size)/$w) + 1" | bc -l | xargs printf "%1.0f"`;
	else
		scale=`echo "(($w*$t_size)/$h) + 1" | bc -l | xargs printf "%1.0f"`;
	fi
	
	# scale the image
	sips -Z $scale $img
done

echo "\n ***** RESIZING DONE *****";