The OptiPNG program shall attempt to optimize PNG files, i.e. reduce
theiz size to a minimum, without losing semantic information. In addi-
tion, this program shall perform a suite of auxiliary functions like
integrity checks, metadata recovery and pixmap-to-PNG conversion.

Tested as working on Samsung XE50013-K01US.

All tests passed.
https://gist.github.com/cstrouse/bb6a59a0f59348a45721f389bcd9ee53