Please always write to the mailing list. Heinrich Lee Yu wrote: > I would like to ask about the binary blob you mentioned in your reply. > For example, I save this blob in mySQL, how do i compare my prints? > Should i just compare the blobs directly or should i convert the prints > back to fp_print_data?
You have to convert them back. Prints are only ever compared for similarity, not for equality. > If i need to convert them back, how do i compare two fp_print_data > structs? i dont see a function in libfprint that does this because as i > understand it the fp_verify and fp_identify functions need to perform a > new scan before comparing and not compare two already scanned > fingerprints. You cannot compare two print structures for reasons discussed a few times on this list (it would allow external drivers to exist). This may change in future. But basically, the idea is that you load the print you want to verify against from MySQL and then feed it into a verify/identify function call which performs the scan, then you get your result. Daniel _______________________________________________ fprint mailing list [email protected] http://lists.reactivated.net/mailman/listinfo/fprint
