| .TH PNG 5 "July 9, 2011" |
| .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" |
| .IR libpng(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://www.libpng.org/pub/png |
| .LP |
| PNG 1.0 specification, October 1996: |
| .IP |
| .br |
| RFC 2083 |
| .IP |
| .br |
| ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt |
| .br |
| or (as a W3C Recommendation) at |
| .br |
| http://www.w3.org/TR/REC-png.html |
| .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 |
| |
