1 .TH PNG 5 "December 1, 2018"
3 png \- Portable Network Graphics (PNG) format
6 PNG (Portable Network Graphics) is an extensible file format for the
7 lossless, portable, well-compressed storage of raster images. PNG
8 provides a patent-free replacement for GIF, and can also replace many
9 common uses of TIFF. Indexed-color, grayscale, and truecolor images are
10 supported, plus an optional alpha channel. Sample depths range from
13 PNG is designed to work well in online viewing applications, such
14 as the World Wide Web, so it is fully streamable with a progressive
15 display option. PNG is robust, providing both full file integrity
16 checking and fast, simple detection of common transmission errors.
17 Also, PNG can store gamma and chromaticity data for improved color
18 matching on heterogeneous platforms.
21 .BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
23 PNG Specification (Second Edition), November 2003:
26 https://www.w3.org/TR/2003/REC-PNG-20031110/
28 PNG 1.2 Specification, July 1999:
31 https://png-mng.sourceforge.io/pub/png/spec/1.2/
33 PNG 1.0 Specification, October 1996:
38 https://www.ietf.org/rfc/rfc2083.txt
43 https://www.w3.org/TR/REC-png-961001
46 This man page: Cosmin Truta, Glenn Randers-Pehrson
48 Portable Network Graphics (PNG) Specification (Second Edition)
49 Information technology - Computer graphics and image processing -
50 Portable Network Graphics (PNG): Functional specification.
51 ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
53 Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
54 Glenn Randers-Pehrson and others (png-list).
56 Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
57 Thomas Boutell and others (png-list).
63 Copyright (c) 2018 Cosmin Truta.
65 Copyright (c) 1998-2006 Glenn Randers-Pehrson.
67 See png.h for conditions of use and distribution.
69 The PNG Specification (Second Edition) is
71 Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
73 The PNG-1.2 Specification is
75 Copyright (c) 1999 Glenn Randers-Pehrson.
77 See the specification for conditions of use and distribution.
79 The PNG-1.0 Specification is
81 Copyright (c) 1996 Massachusetts Institute of Technology.
83 See the specification for conditions of use and distribution.