This is the command pngmeta that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
pngmeta - extract metadata from Portable Network Graphics (PNG) image files
SYNOPSIS
pngmeta [--soif] [--html] [--xrdf] [--all] [--quiet] [--uri URI] [filename]
DESCRIPTION
The pngmeta filter outputs the metadata from Portable Network Graphics (PNG) format image
files in one of these formats:
1. Simple key: value
2. SOIF format (as used by the Harvest system, version 1.4).
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.
3. HTML page With each element as an element in a descriptive (DL) list
4. XML/RDF With each element as an RDF property on the source URI.
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.
FORMAT OPTIONS
--soif Format output using (Harvest) SOIF format. This is the default if the program is
called PngImage.sum.
--html Format output in HTML, with each field/value as an element in a descriptive (DL)
list.
--xrdf Format output in RDF/XML, with each field/value as an element in an rdf:Description
block inside the outer rdf:RDF wrapper element. If an XMLRDFDATA field is found,
it is assumed to be RDF/XML content and is emitted in a second rdf:Description
block.
OTHER OPTIONS
--all Output all the information about the image size, depth etc. even if not usually
printed.
--quiet
Suppress the output of the banner for plain text output. --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.
--help Show a usage message
--version
Show the program and library versions
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