In the remaining light cast by Google sunsetting Reader I wrote
starget, a small command-line tool of particular use:
starget copies all images referred in your (public) starred Google Reader items to a local directory. Its peculiar use case is only exceeded by its short-livedness—use before July 1, 2013.
starget url target_dir [-all]
The following options are available:
To download the images of my latest starred items:
starget http://bit.ly/13TMQGc /tmp/starred
-all option and you would literally download all of my starred images since 2007.
So, if you have starred items with images that you don't want to lose: make the starred items page public in your Google Reader settings, copy and paste the URL, and download all the images you once have starred.
Install with npm:
npm install -g starget