PNG24 refers to a full colour PNG image, with 8bit per R, G, B channel. It is often said that PNG8 can only support 1bit transparency (either on or off), but the PNG specs actually allow for stacking a second colour table of transparency values, and PNG8 therefore can support full 8bit transparency. PNG8 generally refers to a 8bit indexed image - an image that saves a 0-255 values colour table, and is restricted to 256 colours. You are correct that terminology is one of the confusing factors here. PNG actually does support full 16-bit PER CHANNEL images. Whereas, the 16-bit png has better resolution, although, it's a honkin' big file! Question: Is not a HeadShot on the web better/finer detail as a 16-bit png file.or 8-bit jpg? That's my OSheaYou are wrong in regards to PNG not supporting 16-bit images - unless I misunderstand your answer, PNG does support 2^16 tonal values in each colour channel The following table is sourced from the PNG wikipedia page: However, I was thinking, "Why give clients an 8-bit jpeg file, when I could give them a 16-bit png file (which can also be shared on the web). As an internet/web file, previously, I would give clients a jpeg file-to which my understanding was: it can be universally shared on the internet (sRGB color space) successfully. So, you ask, "Why would I want that?" Well, as a HeadShot photographer, all my final files to clients are either used for PRINT purposes (which is another discussion for another day), or for displaying on the web (this is my immediate concern).
Of course, I thought that if I could get a 16-bit png file with "Export As" just like I can with "Save As", I would be getting the highest quality png file I could (I hope that is correct!). But here is why I was so interested in "hoping" that "Export As" would give me a 16-bit png. This is interesting, for I've always assumed that PNG-24 was the highest quality for PNG, but I thought it was 16-bit.
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