| .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 | |