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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 checking
       and fast, simple	detection of common transmission errors. Also, PNG can
       store gamma and chromaticity data for improved color matching  on  het-
       erogeneous platforms.

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

       PNG specification (second edition), November 2003:

		<http://www.w3.org/TR/2003/REC-PNG-20031110/  PNG 1.2 specifi-
	      cation, July 1999:

	      http://png-mng.sourceforge.net/pub/png/spec/1.2/

       PNG 1.0 specification, October 1996:

	      RFC 2083

	      http://www.ietf.org/rfc/rfc2083.txt
	      or (as a W3C Recommendation) at
	      http://www.w3.org/TR/REC-png-961001

AUTHORS
       This man	page: 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 NOTICE
       This  man  page	is 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 distri-
       bution.

				March 16, 2017				PNG(5)

NAME | DESCRIPTION | SEE ALSO | AUTHORS | COPYRIGHT NOTICE

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