This seems like a decent summary of Kant, though like Kant's own work, it involves a gross misreading of Hume. To paraphrase Chomsky: Hume and other so-called empiricists did not actually believe in tabula rasa because they were not imbeciles. Hume wrote an entire chapter on how humans have instincts which determine how we think, just like animals do, for instance.

Kant actually said very little about epistemology that Hume didn't say better. They were both cool, but since everyone wants to hype the beef, Hume -- who never got a chance to defend himself against this "rationalist vs empiricist" false dichotomy -- was cooler. I would encourage anyone and everyone to read his Enquiry Concerning Human Understanding.