| 1 | .TH PNG 5 "January 7, 2025"
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| 2 | .SH NAME
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| 3 | png \- Portable Network Graphics (PNG) format
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| 4 |
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| 5 | .SH DESCRIPTION
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| 6 | PNG (Portable Network Graphics) is an extensible file format for the
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| 7 | lossless, portable, well-compressed storage of raster images. PNG
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| 8 | provides a patent-free replacement for GIF, and can also replace many
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| 9 | common uses of TIFF. Indexed-color, grayscale, and truecolor images are
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| 10 | supported, plus an optional alpha channel. Sample depths range from
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| 11 | 1 to 16 bits.
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| 12 | .br
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| 13 | PNG is designed to work well in online viewing applications, such
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| 14 | as the World Wide Web, so it is fully streamable with a progressive
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| 15 | display option. PNG is robust, providing both full file integrity
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| 16 | checking and fast, simple detection of common transmission errors.
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| 17 | Also, PNG can store gamma and chromaticity data for improved color
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| 18 | matching on heterogeneous platforms.
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| 19 |
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| 20 | .SH "SEE ALSO"
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| 21 | .BR "libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
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| 22 | .LP
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| 23 | PNG Specification (Third Edition) Candidate Recommendation Draft, July 2024:
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| 24 | .IP
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| 25 | .br
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| 26 | https://www.w3.org/TR/2024/CRD-png-3-20240718/
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| 27 | .LP
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| 28 | PNG Specification (Second Edition), November 2003:
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| 29 | .IP
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| 30 | .br
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| 31 | https://www.w3.org/TR/2003/REC-PNG-20031110/
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| 32 | .LP
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| 33 | PNG 1.2 Specification, July 1999:
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| 34 | .IP
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| 35 | .br
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| 36 | https://png-mng.sourceforge.io/pub/png/spec/1.2/
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| 37 | .LP
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| 38 | PNG 1.0 Specification, October 1996:
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| 39 | .IP
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| 40 | .br
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| 41 | RFC 2083
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| 42 | .br
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| 43 | https://www.ietf.org/rfc/rfc2083.txt
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| 44 | .IP
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| 45 | .br
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| 46 | or W3C Recommendation
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| 47 | .br
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| 48 | https://www.w3.org/TR/REC-png-961001
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| 49 |
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| 50 | .SH AUTHORS
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| 51 | This man page: Glenn Randers-Pehrson, Cosmin Truta
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| 52 | .LP
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| 53 | Portable Network Graphics (PNG) Specification (Second Edition)
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| 54 | Information technology - Computer graphics and image processing -
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| 55 | Portable Network Graphics (PNG): Functional specification.
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| 56 | ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
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| 57 | .LP
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| 58 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
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| 59 | Glenn Randers-Pehrson and others.
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| 60 | .LP
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| 61 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
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| 62 | Thomas Boutell and others.
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| 63 |
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| 64 | .\" end of man page
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