The 200K protocol is the RF side. Expect a lot lower on the throughput side.
This is also the total bandwidth not between two devices. This means that if you have multiple devices at one time then you are cutting down the bandwidth even more.
As Rocker said, these are radios only that can transmit serial data. You would need a layer above that to present something easier such as IP. I would suggest looking into https://github.com/XBeeInternetGateway/XIG which might help you.
That or even a simple PPP setup (remember dial up internet, if you are old enough to remember that, is PPP as well).
Also, put some software on the PI that will compress that image as much as possible.