Panorama Gimp plug-in
The gimp plugin was originally created by Helmut Dersch and is available for both Unix and Windows platforms. Current development including help documentation and an autotools-based build system is taking place in the gimp-plugin-ng CVS module at sourceforge.
Download source code
You can download source code ZIP file from https://sourceforge.net/code-snapshots/hg/p/pa/panotools/gimp-plugin/panotools-gimp-plugin-b5c97e7a28c52bae6a8f2b725deff7096ddeb7cf.zip and decompressing orby issuing command
hg clone http://hg.code.sf.net/p/panotools/gimp-plugin panotools-gimp-pluginwhich will make copy of relevant part of source code repository.
./autogen.sh ./configure make sudo make.install
Plugin works just for layers without alpha channel. Tested with Gimp 2.6.12 Some sample wokflow in Edit zenith and nadir in one go with Adjust filter article