[fprint] Merging together multiple scans of the same fingerprint?

[Alan Davidson]

Thanks for the responses! I'm using the latest version available through
apt-get on Ubuntu 14.04, which is labeled 1:0.5.1-1. I see that I can
download the source code for version 0.6.0 at [1]. Is that the version you
recommend I use? If not, where should I get it?

 - Alan

[1] https://people.freedesktop.org/~hadess/

On Thu, Aug 11, 2016 at 1:25 PM, Martin Hejnfelt <martin at duffman.dk> wrote:

> Hi Alan,
>
> On Thu, 2016-08-11 at 10:13 -0700, Vasily Khoruzhick wrote:
> > Hi Alan,
> >
> > On Thu, Aug 11, 2016 at 10:03 AM, Alan Davidson <alan at key.me> 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.
>
> I can verify Vasily's answer. I use the same reader with libfprint, and
> it scans 5 consecutive times for enrollment, if you use an up-to-date
> version of libfprint.
>
> Regards,
> Martin Hejnfelt
>
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