Davr1

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