1.TH PNG 5 "March 26, 2015"
 2.SH NAME
 3png \- Portable Network Graphics (PNG) format
 4.SH DESCRIPTION
 5PNG (Portable Network Graphics) is an extensible file format for the
 6lossless, portable, well-compressed storage of raster images. PNG provides
 7a patent-free replacement for GIF and can also replace many
 8common uses of TIFF. Indexed-color, grayscale, and truecolor images are
 9supported, plus an optional alpha channel. Sample depths range from
101 to 16 bits.
11.br
12
13PNG is designed to work well in online viewing applications, such as the
14World Wide Web, so it is fully streamable with a progressive display
15option. PNG is robust, providing both full file integrity checking and
16fast, simple detection of common transmission errors. Also, PNG can store
17gamma and chromaticity data for improved color matching on heterogeneous
18platforms.
19
20.SH "SEE ALSO"
21.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
22.LP
23PNG specification (second edition), November 2003:
24.IP
25.br
26  <http://www.w3.org/TR/2003/REC-PNG-20031110/
27PNG 1.2 specification, July 1999:
28.IP
29.br
30http://www.libpng.org/pub/png
31.LP
32PNG 1.0 specification, October 1996:
33.IP
34.br
35RFC 2083
36.IP
37.br
38ftp://ds.internic.net/rfc/rfc2083.txt
39.br
40or (as a W3C Recommendation) at
41.br
42http://www.w3.org/TR/REC-png.html
43.SH AUTHORS
44This man page: Glenn Randers-Pehrson
45.LP
46Portable Network Graphics (PNG) Specification (Second Edition)
47Information technology - Computer graphics and image processing -
48Portable Network Graphics (PNG): Functional specification.
49ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
50.LP
51Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
52Glenn Randers-Pehrson and others (png-list).
53.LP
54Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
55Thomas Boutell and others (png-list).
56.LP
57
58
59.SH COPYRIGHT NOTICE
60.LP
61This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson.  See png.h
62for conditions of use and distribution.
63.LP
64The PNG Specification (Second Edition) is
65Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
66.LP
67The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
68See the specification for conditions of use and distribution.
69.LP
70The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
71Technology.  See the specification for conditions of use and distribution.
72.LP
73.\" end of man page
74