Re: Bit Depth
Glenn Randers-Pehrson <[email protected]>
| Newsgroups | gmane.comp.graphics.png.devel |
|---|---|
| Message-ID | <CA+PdXctvGFLxVMJ03Go8rMMpMCwcJNq5-H3aNbKb8fCJ7xeY9g@mail.gmail.com> |
On Tue, Dec 13, 2016 at 7:50 PM, Ruben Safir <ruben-v1XHP5QhJixWk0Htik3J/[email protected]> wrote: > > Indeed, I have 8 bit precision and color type of 6, and I've confirmed > this visually with od. > > How can that be? I don't even know what that prepresents. The image > has almost 29,000 unique colors. That is not 2^8. > > :( > > I've research then for nearly 2 days and can't find an explanation for > this and how it implimented. And I'm very stuck. Does this mean the > color is 2^8 x 2^8 x 2^8? Yes, 16 million colors x 256 alphas: Color type 6, bit-depth 8 means RGBA8888. See https://www.w3.org/TR/PNG/#11IHDR > That would be the 24 bit color I've come to > know and love. > Color type 2, bit-depth 8 is 24-bit RGB888. Glenn ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ png-mng-implement mailing list png-mng-implement-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org https://lists.sourceforge.net/lists/listinfo/png-mng-implement