Re:PNG format co-designer Glenn Randers-Pehrson has died
by gpvos on Thursday October 25, 2018 @06:36AM
(#18299863)
There are, but those are not the ones one thinks of by default when talking about PNG. If they do, they should clearly tell you they are doing something nonstandard.
The should be just plain (completely) lossless unless your image encoder is doing something evil behind your back.