.TH PNG 5 "January 31, 2001".SH NAMEpng \- Portable Network Graphics (PNG) format.SH DESCRIPTIONPNG (Portable Network Graphics) is an extensible file format for thelossless, portable, well-compressed storage of raster images. PNG providesa patent-free replacement for GIF and can also replace manycommon uses of TIFF. Indexed-color, grayscale, and truecolor images aresupported, plus an optional alpha channel. Sample depths range from1 to 16 bits..brPNG is designed to work well in online viewing applications, such as theWorld Wide Web, so it is fully streamable with a progressive displayoption. PNG is robust, providing both full file integrity checking andfast, simple detection of common transmission errors. Also, PNG can storegamma and chromaticity data for improved color matching on heterogeneousplatforms..SH "SEE ALSO".IR libpng(3), zlib(3), deflate(5), and zlib(5).LPPNG 1.2 specification, July 1999:.IP.brhttp://www.libpng.org/pub/png.bror ftp://ftp.uu.net/graphics/png/documents.LPPNG 1.0 specification, October 1996:.IP.brRFC 2083.IP.brftp://ds.internic.net/rfc/rfc2083.txt.bror (as a W3C Recommendation) at.brhttp://www.w3.org/TR/REC-png.html.SH AUTHORSThis man page: Glenn Randers-Pehrson.LPPortable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu)..LPPortable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):Thomas Boutell and others (png-list@ccrc.wustl.edu)..LP.SH COPYRIGHT NOTICEThe PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.See the specification for conditions of use and distribution..LPThe PNG-1.0 specification is copyright (c) 1996 Massachussets Institute ofTechnology.  See the specification for conditions of use and distribution..LP.\" end of man page