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), 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: Glenn Randers-Pehrson, Cosmin Truta

       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.

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

                                        February 23, 2024                                  PNG(5)