I've developed a novel GIMP plugin that should allow all owners of my January 2023 Nifty Gateway release to decode the hidden images themselves
- Log into Nifty Gateway and download the full-size image. It should be > 30Mb.
- Download and install GIMP (GNU Image Manipulation Program) from https://gimp.org
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Download the plugin file here and place it in the GIMP plug-ins folder
If you don't know where the plug-ins folder is
- Open GIMP and navigate to Edit->Preferences
- Scroll down in the left hand menu and click the plus sign next to Folders to expand the group
- Click Plug-ins under the Folders group
- Note the folders listed.
- Copy the file to one of the folders listed
- If you are running linux, ensure the file is executable.
- Using GIMP, open a steganon artwork which has an embedded hidden image
- Click menu item Filters->steganon->Extract Hidden Image
- Wait a minute or so to see the extracted image.