Re: Color Format Extension

PNG is intended to support color formats commonly used on the web 
(especially to compete with single-frame GIF, and to some extent with 
JPEG) and in general purpose imaging applications.

It seems like DNG is designed for this sort of image.  If the PNG 
specification supported raw bayer images then hardly any software 
would support that subformat, which would result in failure.

PNG seems like it is "done" and mature with the exception of perhaps 
supporting additional optional chunks.

Something I am interested in is support for Zstandard compression 
(http://facebook.github.io/zstd/), which appears to be a worthy 
alternative (much more speed and better compression ratios) than 
zlib-based compression.  The format/implementation is still young, but 
seems quite compelling.

Bob
-- 
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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