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 (Third Edition), June 2025:

              https://www.w3.org/TR/2025/REC-png-3-20250624/

       PNG Specification (Second Edition), November 2003:

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

       PNG 1.2 Specification, August 1999:

              https://www.libpng.org/pub/png/spec/1.2/

       PNG 1.1 Specification, December 1998:

              https://www.libpng.org/pub/png/spec/1.1/

       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 (Third Edition).  W3C Recommendation 24 June 2025: Chris
       Blume et al.

       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), W3C Recommendation 10 November 2003: David Duce et al.

       Portable Network Graphics (PNG) Specification Version 1.2 (11 August 1999): Glenn Randers-Pehrson et al.

       Portable  Network  Graphics  (PNG) Specification Version 1.1 (31 December 1998): Glenn Randers-Pehrson et
       al.

       Portable Network Graphics (PNG) Specification Version 1.0.  IETF RFC 2083, W3C Recommendation  1  October
       1996: Thomas Boutell et al.

                                                  July 1, 2025                                            PNG(5)