No visual data is being collected. Can't be done over CAN, it is very low bandwidth and very few bits are programmable.they're collecting visual data about road markings, traffic signs, and are also sending CANbus data. How they take visual data from the cameras and convert it into 10kb per kilometer, I have no idea.
Mobileye could be flagging and classifying road data like signs and encoding the type and location, but that is it.
I'd love to see Mobileye improve their data collection and demonstrate it, but when I worked with them it was like pulling teeth for them to innovate.
Edit: I'm done clogging this thread with this conversation. Take it to the engineering thread in the future.