Correct me if I’m wrong: I understand, the 506 bytes template is only available once the third print was taken during enrollment. Then it can be downloaded by the enrollment ID.
It seems one can download the picture of the captured print though.
I tried finding a ‘fingerprint identification algorithm’ ‘for embedded systems’ – none of them gave the actual algorithm … maybe you are luckier or more patient … pls tell us if you solved it. :)