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 bits.
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 heterogeneous platforms.
libpng(3),
libpngpf(3),
zlib(3),
deflate(5),
and
zlib(5)
PNG Specification (Second Edition), November 2003:
-
https://www.w3.org/TR/2003/REC-PNG-20031110/
PNG 1.2 Specification, July 1999:
-
https://png-mng.sourceforge.io/pub/png/spec/1.2/
PNG 1.0 Specification, October 1996:
-
RFC 2083
https://www.ietf.org/rfc/rfc2083.txt
-
or W3C Recommendation
https://www.w3.org/TR/REC-png-961001
This man page: Glenn Randers-Pehrson, Cosmin Truta
Portable Network Graphics (PNG) Specification (Second Edition) 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) 2018 Cosmin Truta.
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 Randers-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 conditions of use and distribution.