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- .TH PNG 5 "December 3, 2015"
- .SH NAME
- png \- Portable Network Graphics (PNG) format
- .SH DESCRIPTION
- 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.
- .br
- 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.
- .SH "SEE ALSO"
- .BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
- .LP
- PNG specification (second edition), November 2003:
- .IP
- .br
- <http://www.w3.org/TR/2003/REC-PNG-20031110/
- PNG 1.2 specification, July 1999:
- .IP
- .br
- http://png-mng.sourceforge.net/pub/png/spec/1.2/
- .LP
- PNG 1.0 specification, October 1996:
- .IP
- .br
- RFC 2083
- .IP
- .br
- ftp://ds.internic.net/rfc/rfc2083.txt
- .br
- or (as a W3C Recommendation) at
- .br
- http://www.w3.org/TR/REC-png-961001
- .SH AUTHORS
- This man page: Glenn Randers-Pehrson
- .LP
- 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.
- .LP
- Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
- Glenn Randers-Pehrson and others (png-list).
- .LP
- Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
- Thomas Boutell and others (png-list).
- .LP
- .SH COPYRIGHT NOTICE
- .LP
- This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h
- for conditions of use and distribution.
- .LP
- The PNG Specification (Second Edition) is
- Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
- .LP
- The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
- See the specification for conditions of use and distribution.
- .LP
- The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
- Technology. See the specification for conditions of use and distribution.
- .LP
- .\" end of man page
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