| .TH PNGMETA 1 "10 March 1998" |
| .\" |
| .\" Manual page for pngmeta - see end of page for copyright |
| .\" |
| .\" $Source: /home/cur/djb1/develop/pngmeta/pngmeta/RCS/pngmeta.1,v $ |
| .\" |
| .\" $Id: pngmeta.1,v 1.4 2000/01/31 14:05:45 djb1 Exp $ |
| .\" |
| .SH NAME |
| pngmeta \- extract metadata from Portable Network Graphics (PNG) image files |
| .SH SYNOPSIS |
| .B pngmeta |
| .RB [ \--soif ] |
| .RB [ \--html ] |
| .RB [ \--xrdf ] |
| .RB [ \--all ] |
| .RB [ \--quiet ] |
| .RB [ \--uri\ URI ] |
| .RI [ filename ] |
| .SH DESCRIPTION |
| The |
| .I pngmeta |
| filter outputs the metadata from Portable Network Graphics (PNG) |
| format image files in one of these formats: |
| .LP |
| 1. Simple key: value |
| .LP |
| 2. SOIF format (as used by the Harvest system, version 1.4). |
| .IP |
| As such it can be used as a Summarizer for the Harvest Essence system. |
| It could also be used by other indexers to extract data for |
| indexing PNG images. |
| .LP |
| 3. HTML page |
| With each element as an element in a descriptive (DL) list |
| .LP |
| 4. XML/RDF |
| With each element as an RDF property on the source URI. |
| .LP |
| In the absence of options, the program operates as a filter, |
| accepting input from stdin and sending output to stdout. |
| If a single file name is given, |
| it is assumed to correspond to a PNG file, |
| and is processed. |
| .SH FORMAT OPTIONS |
| .TP |
| .B \--soif |
| Format output using (Harvest) SOIF format. This is the default if |
| the program is called PngImage.sum. |
| .TP |
| .B \--html |
| Format output in HTML, with each field/value as an element in a descriptive |
| .RB ( DL ) |
| list. |
| .TP |
| .B \--xrdf |
| Format output in RDF/XML, with each field/value as an element in a descriptive |
| .RB ( DL ) |
| list. |
| .SH OTHER OPTIONS |
| .TP |
| .B \--all |
| Output all the information about the image size, depth etc. even if |
| not usually printed. |
| .TP |
| .B \--quiet |
| Suppress the output of the banner for plain text output. |
| .B \--uri URI |
| Set the URI that is used for the SOIF and XML/RDF outputs. By |
| default this will be the filename, or "stdin" if this is the program |
| is used as a filter. |
| .TP |
| .B \--help |
| Show a usage message |
| .TP |
| .B \--version |
| Show the program and library versions |
| .SH FILES |
| .TP 2.2i |
| .I pngmeta |
| executable |
| .SH "SEE ALSO" |
| .IR gif2png (1), |
| .IR libpng (3), |
| .IR pbm (1), |
| .IR pgm (1), |
| .IR pngcheck (1), |
| .IR pngtopnm (1), |
| .IR pnm (5), |
| .IR pnmgamma (1), |
| .IR pnmtopng (1), |
| .IR ptot (1), |
| .IR tiff2png (1), |
| .IR zlib (3) |
| .LP |
| For information about Harvest and its SOIF format: |
| .IP |
| http://harvest.cs.colorado.edu/ |
| .LP |
| For |
| .IR PNG |
| .IP |
| http://www.cdrom.com/pub/png/ |
| .LP |
| For |
| .IR "libpng library:" |
| .IP |
| ftp://swrinde.nde.swri.edu/pub/png/src/ |
| .br |
| http://www.cdrom.com/pub/png/src/ |
| .LP |
| For |
| .IR zlib |
| .IP |
| http://www.cdrom.com/pub/infozip/zlib/ |
| .LP |
| For |
| .IR "zlib library:" |
| .IP |
| http://www.cdrom.com/pub/infozip/zlib/ |
| .SH AUTHORS |
| Version 1.10. |
| Dave Beckett (D.J.Beckett@ukc.ac.uk). |
| .LP |
| The |
| .IR zlib (3) |
| library required by |
| .I pngmeta |
| is copyright (C) 1995-1996 Jean-loup Gailly and Mark Adler. |
| Some code was modified from the code for the |
| .IR libpng (3) |
| library function |
| .B png_read_end() |
| which is copyright (c) Guy Eric Schalnat, Andreas Dilger, Glenn |
| Randers-Pehrson and others -- see the source for details. |
| .LP |
| Original UNIX manual page by R. P. C. Rodgers, |
| U.S. National Library of Medicine (rodgers@nlm.nih.gov). |
| .\" end of man page |
