Man1 - jbig2dec.1

jbig2dec - File format converter specialized in JBIG2 decoding

jbig2dec [/options/] file.jbig2
jbig2dec [/options/] global-stream page-stream

The jbig2dec command converts JBIG2 files to png or pbm files.

When passed a single file argument it is interpreted as a JBIG2 file stream, with either sequential or random-access organization.

When passed two stream arguments, they are interpreted as the global and page-specific portions of an embedded organization, as used in PDF. If a particular page references no global segment stream, dev/null can be passed for the /global-stream argument to request the embedded parser.

The options are as follows:

-e, –embedded

Expect embedded bit stream without file header.

-o*/ file/, –output*/ file/

Store the decoded output in file. Defaults to the input with a different extension. Set to - for standard output.

-t*/ type/, –format*/ type/

Force a particular output file format. Supported are png and pbm.

-d, –dump

Print the structure of the JBIG2 file rather than explicitly decoding it.

-m, –hash

Print a hash of the decoded document.

-q, –quiet

Suppress warnings and other diagnostic output.

-v, –verbose

Report additional information about the decoding process. Pass just -v for information about the file as it’s being decoded. This is the same as –verbose=2. Pass –verbose=3 or higher for debugging information.

-V, –version

Show program version information.

-h, –help

Show usage summary.

Report bugs at https://bugs.ghostscript.com

Contact the developers at the IRC channel #ghostscript at freenode.net or via the mailing list <gs-devel@ghostscript.com>.

This manpage was initially written by Sebastian Rasmussen <sebras@gmail.com> for jbig2dec and the Debian Project.