We have developed a proof-of-concept plugin for the GIMP 2.2.
The user interface is not optimal because of several restrictions of the GIMP plugin API. The plugin succeeds on only about 50% of the pictures the GIMP tool succeeds on.
This plugin is provided as is in the hope that it will be useful until SIOX is
integrated as a tool in GIMP 2.4. The code is licensed under the GNU General Public License.
Files:GIMP 2.3.7 including SIOX for Windows and Linux can be downloaded here.
siox4gimp - Binary for GIMP 2.2 under Linux (x86) - 72kB from 2005/07/28
To install a plugin, just copy the binary into your GIMP plugin directory and start the GIMP (under Linux: Do no forget to set the executable flag with chmod +x).
For further information on GIMP plugins refer to GIMP's documentation.
The plugin installs itself into GIMP's menus under Filters/Misc/Foreground Extraction....
See the manual page for usage instructions.