src/png/png.5

   1 .TH PNG 5 "August 15, 2004"
   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 .IR libpng(3), zlib(3), deflate(5), and zlib(5)
  22 .LP
  23 PNG 1.2 specification, July 1999:
  24 .IP
  25 .br
  26 http://www.libpng.org/pub/png
  27 .br
  28 or ftp://ftp.uu.net/graphics/png/documents
  29 .LP
  30 PNG 1.0 specification, October 1996:
  31 .IP
  32 .br
  33 RFC 2083
  34 .IP
  35 .br
  36 ftp://ds.internic.net/rfc/rfc2083.txt
  37 .br
  38 or (as a W3C Recommendation) at
  39 .br
  40 http://www.w3.org/TR/REC-png.html
  41 .SH AUTHORS
  42 This man page: Glenn Randers-Pehrson
  43 .LP
  44 Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
  45 Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu).
  46 .LP
  47 Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
  48 Thomas Boutell and others (png-list@ccrc.wustl.edu).
  49 .LP
  50
  51
  52 .SH COPYRIGHT NOTICE
  53 The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
  54 See the specification for conditions of use and distribution.
  55 .LP
  56 The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
  57 Technology.  See the specification for conditions of use and distribution.
  58 .LP
  59 .\" end of man page
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