Hi Alan, On Thu, Aug 11, 2016 at 10:03 AM, Alan Davidson <[email protected]> wrote: > Hi libfprint folks - > > I've got a Digital Persona U.are.U 4500 fingerprint reader, and I'm trying > to migrate to libfprint from the closed source drivers I got from Digital > Persona themselves. > > The driver chosen by libfprint is uru4000, which seems right. When I call > fp_dev_get_nr_enroll_stages on the device, it returns 1: a single scan is > enough to enroll a fingerprint. and indeed, I can scan my finger once and > get back a fp_print_data struct (through the callback passed to > fp_async_enroll_start).
Probably you're using old libfprint. Newer returns 5. It scans finger 5 times and upon verification it compares scanned finger to a gallery. > However, the old closed source drivers had a way to capture a set of 4 scans > of the same finger (what they called an "enrollment", as opposed to a > single-scan "capture") that were merged together to form a more robust, > reliable view of the finger. Is there a way to mirror that functionality > with libfprint, given that my device seems to use just 1 stage for an > enrollment? Stitching images together is not implemented. > The motivation here is that when someone registers their fingerprint, we > want to make sure we've got a high quality scan on file, so that they can > reliably match it later. > > Thanks in advance for your help. Regards, Vasily > - Alan > > _______________________________________________ > fprint mailing list > [email protected] > https://lists.freedesktop.org/mailman/listinfo/fprint > _______________________________________________ fprint mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/fprint
