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libpng - A library of functions for manipulating PNG image format files…  more info»


PNG(5)                                                        PNG(5)

       png - Portable Network Graphics (PNG) format

       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

       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  heteroge‐
       neous platforms.


       PNG specification (second edition), November 2003:

                < PNG 1.2
              specification, July 1999:


       PNG 1.0 specification, October 1996:

              RFC 2083

              or (as a W3C Recommendation) at

       This man page: Glenn Randers-Pehrson

       Portable Network Graphics (PNG)  Specification  (Second  Edi‐
       tion)  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).

       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  Ran‐
       ders-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 condi‐
       tions of use and distribution.

                           April 23, 2006                     PNG(5)
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