| | 1 | .TH PNG 5 "September 18, 2002" |
| | 2 | .SH NAME |
| | 3 | png \- Portable Network Graphics (PNG) format |
| | 4 | .SH DESCRIPTION |
| | 5 | PNG (Portable Network Graphics) is an extensible file format for the |
| | 6 | lossless, portable, well-compressed storage of raster images. PNG provides |
| | 7 | a patent-free replacement for GIF and can also replace many |
| | 8 | common uses of TIFF. Indexed-color, grayscale, and truecolor images are |
| | 9 | supported, plus an optional alpha channel. Sample depths range from |
| | 10 | 1 to 16 bits. |
| | 11 | .br |
| | 12 | |
| | 13 | PNG is designed to work well in online viewing applications, such as the |
| | 14 | World Wide Web, so it is fully streamable with a progressive display |
| | 15 | option. PNG is robust, providing both full file integrity checking and |
| | 16 | fast, simple detection of common transmission errors. Also, PNG can store |
| | 17 | gamma and chromaticity data for improved color matching on heterogeneous |
| | 18 | platforms. |
| | 19 | |
| | 20 | .SH "SEE ALSO" |
| | 21 | .IR libpng(3), zlib(3), deflate(5), and zlib(5) |
| | 22 | .LP |
| | 23 | PNG 1.2 specification, July 1999: |
| | 24 | .IP |
| | 25 | .br |
| | 26 | http://www.libpng.org/pub/png |
| | 27 | .br |
| | 28 | or ftp://ftp.uu.net/graphics/png/documents |
| | 29 | .LP |
| | 30 | PNG 1.0 specification, October 1996: |
| | 31 | .IP |
| | 32 | .br |
| | 33 | RFC 2083 |
| | 34 | .IP |
| | 35 | .br |
| | 36 | ftp://ds.internic.net/rfc/rfc2083.txt |
| | 37 | .br |
| | 38 | or (as a W3C Recommendation) at |
| | 39 | .br |
| | 40 | http://www.w3.org/TR/REC-png.html |
| | 41 | .SH AUTHORS |
| | 42 | This man page: Glenn Randers-Pehrson |
| | 43 | .LP |
| | 44 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): |
| | 45 | Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu). |
| | 46 | .LP |
| | 47 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): |
| | 48 | Thomas Boutell and others (png-list@ccrc.wustl.edu). |
| | 49 | .LP |
| | 50 | |
| | 51 | |
| | 52 | .SH COPYRIGHT NOTICE |
| | 53 | The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. |
| | 54 | See the specification for conditions of use and distribution. |
| | 55 | .LP |
| | 56 | The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of |
| | 57 | Technology. See the specification for conditions of use and distribution. |
| | 58 | .LP |
| | 59 | .\" end of man page |
| | 60 | |
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