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1 | .TH PNG 5 "February 18, 2012" | ||
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 | .BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) | ||
22 | .LP | ||
23 | PNG specification (second edition), November 2003: | ||
24 | .IP | ||
25 | .br | ||
26 | <http://www.w3.org/TR/2003/REC-PNG-20031110/ | ||
27 | PNG 1.2 specification, July 1999: | ||
28 | .IP | ||
29 | .br | ||
30 | http://www.libpng.org/pub/png | ||
31 | .LP | ||
32 | PNG 1.0 specification, October 1996: | ||
33 | .IP | ||
34 | .br | ||
35 | RFC 2083 | ||
36 | .IP | ||
37 | .br | ||
38 | ftp://ds.internic.net/rfc/rfc2083.txt | ||
39 | .br | ||
40 | or (as a W3C Recommendation) at | ||
41 | .br | ||
42 | http://www.w3.org/TR/REC-png.html | ||
43 | .SH AUTHORS | ||
44 | This man page: Glenn Randers-Pehrson | ||
45 | .LP | ||
46 | Portable Network Graphics (PNG) Specification (Second Edition) | ||
47 | Information technology - Computer graphics and image processing - | ||
48 | Portable Network Graphics (PNG): Functional specification. | ||
49 | ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others. | ||
50 | .LP | ||
51 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): | ||
52 | Glenn Randers-Pehrson and others (png-list). | ||
53 | .LP | ||
54 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): | ||
55 | Thomas Boutell and others (png-list). | ||
56 | .LP | ||
57 | |||
58 | |||
59 | .SH COPYRIGHT NOTICE | ||
60 | .LP | ||
61 | This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h | ||
62 | for conditions of use and distribution. | ||
63 | .LP | ||
64 | The PNG Specification (Second Edition) is | ||
65 | Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved. | ||
66 | .LP | ||
67 | The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. | ||
68 | See the specification for conditions of use and distribution. | ||
69 | .LP | ||
70 | The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of | ||
71 | Technology. See the specification for conditions of use and distribution. | ||
72 | .LP | ||
73 | .\" end of man page | ||
74 | |||