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.TH PNG 5 "July 11, 2000"
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1998-02-07 11:20:57 -05:00
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.SH NAME
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png \- Portable Network Graphics (PNG) format
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.SH DESCRIPTION
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PNG (Portable Network Graphics) is an extensible file format for the
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lossless, portable, well-compressed storage of raster images. PNG provides
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a patent-free replacement for GIF and can also replace many
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common uses of TIFF. Indexed-color, grayscale, and truecolor images are
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supported, plus an optional alpha channel. Sample depths range from
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1998-12-29 12:47:59 -05:00
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1 to 16 bits.
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.br
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PNG is designed to work well in online viewing applications, such as the
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World Wide Web, so it is fully streamable with a progressive display
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option. PNG is robust, providing both full file integrity checking and
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fast, simple detection of common transmission errors. Also, PNG can store
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gamma and chromaticity data for improved color matching on heterogeneous
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platforms.
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.SH "SEE ALSO"
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.IR libpng(3), zlib(3), deflate(5), and zlib(5)
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.LP
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2000-02-05 00:40:16 -05:00
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PNG 1.2 specification, July 1999:
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.IP
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.br
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2000-03-21 06:13:06 -05:00
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http://www.cdrom.com/pub/png (moving to http://www.libpng.org)
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.br
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or ftp://ftp.uu.net/graphics/png/documents
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.LP
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PNG 1.0 specification, October 1996:
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.IP
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.br
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1998-02-07 11:20:57 -05:00
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RFC 2083
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.IP
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.br
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ftp://ds.internic.net/rfc/rfc2083.txt
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.br
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or (as a W3C Recommendation) at
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.br
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http://www.w3.org/TR/REC-png.html
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.SH AUTHORS
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This man page: Glenn Randers-Pehrson
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.LP
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1999-09-17 13:27:26 -04:00
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Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
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Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu).
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.LP
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1998-02-07 11:20:57 -05:00
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Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
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Thomas Boutell and others (png-list@ccrc.wustl.edu).
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.LP
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1999-09-17 13:27:26 -04:00
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1998-02-07 11:20:57 -05:00
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.SH COPYRIGHT NOTICE
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The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
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See the specification for conditions of use and distribution.
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.LP
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The PNG-1.0 specification is copyright (c) 1996 Massachussets Institute of
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Technology. See the specification for conditions of use and distribution.
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.LP
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.\" end of man page
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