today we released the KNIME Image Processing - ImageJ 3D Viewer Integration 1.0.0. This extension provides a straightforward integration of the famous FIJI ImageJ 3D Viewer (see http://3dviewer.neurofly.de/).
The Extension can be installed using the stable/nightly update-sites of KNIME Community Contributions (See Step 2.2. http://tech.knime.org/wiki/install-knime-image-processing). In KNIME, you can find the ImageJ 3D Viewer as an additional Tab in the standard Views of the Image Processing Nodes or in the "Table Cell Viewer" Node.
If you have questions or if you face any problems, don't hesitate to contact us!
Martin & Christian