wonderbird

#!/bin/sh
#
# Rescale and compress PNG images.
#
# Source: https://gist.github.com/wonderbird/b210877179e95ef1145b9d9216167336
#
# For every image in all subfolders of SOURCE:
#
# - Rescale image to a width and height of at most 1024 px.
# - Reduce colors to 256 with an optimized palette.