src/png/png.5

   1 .TH PNG 5 "April 25, 2013"
   2 .SH NAME
   3 png \- Portable Network Graphics (PNG) format
   4 .SH DESCRIPTION
   5 PNG (Portable Network Graphics) is an extensible file format for the
   6 lossless, portable, well-compressed storage of raster images. PNG provides
   7 a patent-free replacement for GIF and can also replace many
   8 common uses of TIFF. Indexed-color, grayscale, and truecolor images are
   9 supported, plus an optional alpha channel. Sample depths range from
  10 1 to 16 bits.
  11 .br
  12
  13 PNG is designed to work well in online viewing applications, such as the
  14 World Wide Web, so it is fully streamable with a progressive display
  15 option. PNG is robust, providing both full file integrity checking and
  16 fast, simple detection of common transmission errors. Also, PNG can store
  17 gamma and chromaticity data for improved color matching on heterogeneous
  18 platforms.
  19
  20 .SH "SEE ALSO"
  21 .BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
  22 .LP
  23 PNG specification (second edition), November 2003:
  24 .IP
  25 .br
  26   <http://www.w3.org/TR/2003/REC-PNG-20031110/
  27 PNG 1.2 specification, July 1999:
  28 .IP
  29 .br
  30 http://www.libpng.org/pub/png
  31 .LP
  32 PNG 1.0 specification, October 1996:
  33 .IP
  34 .br
  35 RFC 2083
  36 .IP
  37 .br
  38 ftp://ds.internic.net/rfc/rfc2083.txt
  39 .br
  40 or (as a W3C Recommendation) at
  41 .br
  42 http://www.w3.org/TR/REC-png.html
  43 .SH AUTHORS
  44 This man page: Glenn Randers-Pehrson
  45 .LP
  46 Portable Network Graphics (PNG) Specification (Second Edition)
  47 Information technology - Computer graphics and image processing -
  48 Portable Network Graphics (PNG): Functional specification.
  49 ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
  50 .LP
  51 Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
  52 Glenn Randers-Pehrson and others (png-list).
  53 .LP
  54 Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
  55 Thomas Boutell and others (png-list).
  56 .LP
  57
  58
  59 .SH COPYRIGHT NOTICE
  60 .LP
  61 This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson.  See png.h
  62 for conditions of use and distribution.
  63 .LP
  64 The PNG Specification (Second Edition) is
  65 Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
  66 .LP
  67 The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
  68 See the specification for conditions of use and distribution.
  69 .LP
  70 The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
  71 Technology.  See the specification for conditions of use and distribution.
  72 .LP
  73 .\" end of man page
  74