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PNG(5)			      File Formats Manual			PNG(5)

NAME
       png - Portable Network Graphics (PNG) format

DESCRIPTION
       PNG  (Portable  Network	Graphics) is an	extensible file	format for the
       lossless, portable, well-compressed storage of raster images.  PNG pro-
       vides a patent-free replacement for GIF,	and can	also replace many com-
       mon uses	of TIFF. Indexed-color,	grayscale, and	truecolor  images  are
       supported,  plus	an optional alpha channel.  Sample depths range	from 1
       to 16 bits.
       PNG is designed to work well in online viewing  applications,  such  as
       the  World  Wide	Web, so	it is fully streamable with a progressive dis-
       play option.  PNG is robust, providing both full	file integrity	check-
       ing  and	 fast,	simple detection of common transmission	errors.	 Also,
       PNG can store gamma and chromaticity data for improved  color  matching
       on heterogeneous	platforms.

SEE ALSO
       libpng(3), libpngpf(3), zlib(3),	deflate(5), and	zlib(5)

       PNG Specification (Second Edition), November 2003:

	      https://www.w3.org/TR/2003/REC-PNG-20031110/

       PNG 1.2 Specification, July 1999:

	      https://png-mng.sourceforge.io/pub/png/spec/1.2/

       PNG 1.0 Specification, October 1996:

	      RFC 2083
	      https://www.ietf.org/rfc/rfc2083.txt

	      or W3C Recommendation
	      https://www.w3.org/TR/REC-png-961001

AUTHORS
       This man	page: Cosmin Truta, Glenn Randers-Pehrson

       Portable	Network	Graphics (PNG) Specification (Second Edition) Informa-
       tion technology - Computer graphics and	image  processing  -  Portable
       Network	Graphics  (PNG): Functional specification.  ISO/IEC 15948:2003
       (E) (November 10, 2003):	David Duce and others.

       Portable	Network	Graphics (PNG)	Specification  Version	1.2  (July  8,
       1999): Glenn Randers-Pehrson and	others (png-list).

       Portable	 Network  Graphics (PNG) Specification Version 1.0 (October 1,
       1996): Thomas Boutell and others	(png-list).

COPYRIGHT
       This man	page is
       Copyright (c) 2018-2019 Cosmin Truta.
       Copyright (c) 1998-2006 Glenn Randers-Pehrson.
       See png.h for conditions	of use and distribution.

       The PNG Specification (Second Edition) is
       Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.

       The PNG-1.2 Specification is
       Copyright (c) 1999 Glenn	Randers-Pehrson.
       See the specification for conditions of use and distribution.

       The PNG-1.0 Specification is
       Copyright (c) 1996 Massachusetts	Institute of Technology.
       See the specification for conditions of use and distribution.

				April 14, 2019				PNG(5)

NAME | DESCRIPTION | SEE ALSO | AUTHORS | COPYRIGHT

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