well the same principle as with the VGGnet applies here too. If the rat images differ 'significantly' (whatever that means; i am a research engineer not a patho

well the same principle as with the VGGnet applies here too. If the rat images differ 'significantly' (whatever that means; i am a research engineer not a pathologist) then you will have nothing to transfer. Maybe it would be more fruitful to try to transfer via a huge amount of artificially generated cell images (there are toolboxes for that and its not linear transformations like rotation etc.) blended with some subset of vggnet (or similar) trained only with 'circular' objects ..