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 provides a patent-free replacement for GIF and can also replace many common
       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 display 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 heterogeneous 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 specification, July 1999:

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

       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-961001

AUTHORS

       This man page: Glenn Randers-Pehrson

       Portable Network Graphics (PNG) Specification (Second Edition) Information 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 distribution.

                                                December 3, 2015                                          PNG(5)