In this old topic Mark says that saving as 16-bit PNGs is not possible and that's also what the manual says. However (before I read the manual) I tried to save a > 8 bit image as a PNG and it came out as a valid image that could be read in fine by Fiji/ImageJ. This was true both on CP versions 2.1.2 (#207f5bf) and 2.2 (#ac0529e). Does this mean that that restriction was lifted sometime in between? Or am I going to run into some pain and suffering if I try to use this?
Just FYI: I would like to save images of labeled objects (where I likely will have more than 255 objects per image) and 16-bit TIFF format generates huge files while PNG compresses into nice and small files.