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PNG(5)							   PNG(5)

NAME
       png - Portable Network Graphics (PNG) format

DESCRIPTION
       PNG (Portable Network Graphics) is an extensible file for-
       mat for the lossless, portable, well-compressed storage of
       raster  images. PNG provides a patent-free replacement for
       GIF and	can  also  replace  many  common  uses	of  TIFF.
       Indexed-color,  grayscale,  and	truecolor images are sup-
       ported, plus an	optional  alpha	 channel.  Sample  depths
       range from 1 to 16 bits.

       PNG  is	designed  to work well in online viewing applica-
       tions, such as the World Wide Web, so it is fully  stream-
       able  with  a  progressive  display option. PNG is robust,
       providing both full file integrity checking and fast, sim-
       ple detection of common transmission errors. Also, PNG can
       store gamma  and	 chromaticity  data  for  improved  color
       matching on heterogeneous platforms.

SEE ALSO
       libpng(3),zlib(3),deflate(5),andzlib(5)

       PNG 1.2 specification, July 1999:

	      http://www.cdrom.com/pub/png	 (moving       to
	      http://www.libpng.org)
	      or ftp://ftp.uu.net/graphics/png/documents

       PNG 1.0 specification, October 1996:

	      RFC 2083

	      ftp://ds.internic.net/rfc/rfc2083.txt
	      or (as a W3C Recommendation) at
	      http://www.w3.org/TR/REC-png.html

AUTHORS
       This man page: Glenn Randers-Pehrson

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

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

COPYRIGHT NOTICE
       The PNG-1.2 specification  is  copyright	 (c)  1999  Glenn

			  March 21, 2000			1

PNG(5)							   PNG(5)

       Randers-Pehrson.	  See the specification for conditions of
       use and distribution.

       The PNG-1.0 specification is copyright (c) 1996 Massachus-
       sets  Institute	of Technology.	See the specification for
       conditions of use and distribution.

			  March 21, 2000			2

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