| 1 | .TH PNG 5 "January 29, 2024"
|
|---|
| 2 | .SH NAME
|
|---|
| 3 | png \- Portable Network Graphics (PNG) format
|
|---|
| 4 |
|
|---|
| 5 | .SH DESCRIPTION
|
|---|
| 6 | PNG (Portable Network Graphics) is an extensible file format for the
|
|---|
| 7 | lossless, portable, well-compressed storage of raster images. PNG
|
|---|
| 8 | provides a patent-free replacement for GIF, and can also replace many
|
|---|
| 9 | common uses of TIFF. Indexed-color, grayscale, and truecolor images are
|
|---|
| 10 | supported, plus an optional alpha channel. Sample depths range from
|
|---|
| 11 | 1 to 16 bits.
|
|---|
| 12 | .br
|
|---|
| 13 | PNG is designed to work well in online viewing applications, such
|
|---|
| 14 | as the World Wide Web, so it is fully streamable with a progressive
|
|---|
| 15 | display option. PNG is robust, providing both full file integrity
|
|---|
| 16 | checking and fast, simple detection of common transmission errors.
|
|---|
| 17 | Also, PNG can store gamma and chromaticity data for improved color
|
|---|
| 18 | matching on heterogeneous platforms.
|
|---|
| 19 |
|
|---|
| 20 | .SH "SEE ALSO"
|
|---|
| 21 | .BR "libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
|
|---|
| 22 | .LP
|
|---|
| 23 | PNG Specification (Second Edition), November 2003:
|
|---|
| 24 | .IP
|
|---|
| 25 | .br
|
|---|
| 26 | https://www.w3.org/TR/2003/REC-PNG-20031110/
|
|---|
| 27 | .LP
|
|---|
| 28 | PNG 1.2 Specification, July 1999:
|
|---|
| 29 | .IP
|
|---|
| 30 | .br
|
|---|
| 31 | https://png-mng.sourceforge.io/pub/png/spec/1.2/
|
|---|
| 32 | .LP
|
|---|
| 33 | PNG 1.0 Specification, October 1996:
|
|---|
| 34 | .IP
|
|---|
| 35 | .br
|
|---|
| 36 | RFC 2083
|
|---|
| 37 | .br
|
|---|
| 38 | https://www.ietf.org/rfc/rfc2083.txt
|
|---|
| 39 | .IP
|
|---|
| 40 | .br
|
|---|
| 41 | or W3C Recommendation
|
|---|
| 42 | .br
|
|---|
| 43 | https://www.w3.org/TR/REC-png-961001
|
|---|
| 44 |
|
|---|
| 45 | .SH AUTHORS
|
|---|
| 46 | This man page: Glenn Randers-Pehrson, Cosmin Truta
|
|---|
| 47 | .LP
|
|---|
| 48 | Portable Network Graphics (PNG) Specification (Second Edition)
|
|---|
| 49 | Information technology - Computer graphics and image processing -
|
|---|
| 50 | Portable Network Graphics (PNG): Functional specification.
|
|---|
| 51 | ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
|
|---|
| 52 | .LP
|
|---|
| 53 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
|
|---|
| 54 | Glenn Randers-Pehrson and others.
|
|---|
| 55 | .LP
|
|---|
| 56 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
|
|---|
| 57 | Thomas Boutell and others.
|
|---|
| 58 |
|
|---|
| 59 | .\" end of man page
|
|---|
