I haven’t done this, but the javax.swing.ImageIcon class is supposed to render in a JTable, which is what Ignition’s tables are built on. There are constructors that accept filenames or file contents, so you can probably get what you need. If jython picks the wrong constructor (jython doesn’t do function overloading by type), you can use java reflection to get to it. However you construct the image icon instances, you’ll have to construct the table dataset with scripting.
Hope this helps. 