swirepe

#!/bin/sh
# PNG Gamma trick (by @marcan42 / marcan@marcan.st)
#
# This script implements an improved version of the gamma trick used to make
# thumbnail images on reddit/4chan look different from the full-size image.
#
# Sample output (SFW; images by @Miluda):
#  https://mrcn.st/t/homura_gamma_trick.png
#  https://www.reddit.com/r/test/comments/6edthw/ (click for fullsize)
#  https://twitter.com/marcan42/status/869855956842143744