| 1 | .TH PNG 5 "June 26, 2010" |
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| 2 | .SH NAME |
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| 3 | png \- Portable Network Graphics (PNG) format |
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| 4 | .SH DESCRIPTION |
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| 5 | PNG (Portable Network Graphics) is an extensible file format for the |
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| 6 | lossless, portable, well-compressed storage of raster images. PNG provides |
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| 7 | a patent-free replacement for GIF and can also replace many |
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| 8 | common uses of TIFF. Indexed-color, grayscale, and truecolor images are |
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| 9 | supported, plus an optional alpha channel. Sample depths range from |
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| 10 | 1 to 16 bits. |
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| 11 | .br |
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| 12 | |
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| 13 | PNG is designed to work well in online viewing applications, such as the |
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| 14 | World Wide Web, so it is fully streamable with a progressive display |
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| 15 | option. PNG is robust, providing both full file integrity checking and |
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| 16 | fast, simple detection of common transmission errors. Also, PNG can store |
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| 17 | gamma and chromaticity data for improved color matching on heterogeneous |
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| 18 | platforms. |
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| 19 | |
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| 20 | .SH "SEE ALSO" |
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| 21 | .IR libpng(3) ", " zlib(3) ", " deflate(5) ", and " zlib(5) |
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| 22 | .LP |
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| 23 | PNG specification (second edition), November 2003: |
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| 24 | .IP |
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| 25 | .br |
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| 26 | <http://www.w3.org/TR/2003/REC-PNG-20031110/ |
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| 27 | PNG 1.2 specification, July 1999: |
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| 28 | .IP |
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| 29 | .br |
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| 30 | http://www.libpng.org/pub/png |
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| 31 | .LP |
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| 32 | PNG 1.0 specification, October 1996: |
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| 33 | .IP |
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| 34 | .br |
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| 35 | RFC 2083 |
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| 36 | .IP |
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| 37 | .br |
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| 38 | ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt |
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| 39 | .br |
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| 40 | or (as a W3C Recommendation) at |
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| 41 | .br |
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| 42 | http://www.w3.org/TR/REC-png.html |
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| 43 | .SH AUTHORS |
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| 44 | This man page: Glenn Randers-Pehrson |
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| 45 | .LP |
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| 46 | Portable Network Graphics (PNG) Specification (Second Edition) |
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| 47 | Information technology - Computer graphics and image processing - |
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| 48 | Portable Network Graphics (PNG): Functional specification. |
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| 49 | ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others. |
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| 50 | .LP |
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| 51 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): |
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| 52 | Glenn Randers-Pehrson and others (png-list). |
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| 53 | .LP |
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| 54 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): |
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| 55 | Thomas Boutell and others (png-list). |
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| 56 | .LP |
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| 57 | |
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| 58 | |
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| 59 | .SH COPYRIGHT NOTICE |
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| 60 | .LP |
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| 61 | This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h |
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| 62 | for conditions of use and distribution. |
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| 63 | .LP |
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| 64 | The PNG Specification (Second Edition) is |
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| 65 | Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved. |
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| 66 | .LP |
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| 67 | The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. |
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| 68 | See the specification for conditions of use and distribution. |
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| 69 | .LP |
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| 70 | The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of |
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| 71 | Technology. See the specification for conditions of use and distribution. |
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| 72 | .LP |
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| 73 | .\" end of man page |
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| 74 | |
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