[fprint] 1-n matching?

[Jimmy Jeppesen]

Thanks to both of you! :-)

However, I don't seem to have fprint-identity installed:


root at Zotac:~# fprintd-
fprintd-delete  fprintd-enroll  fprintd-list    fprintd-verify



Which reader do you regard as the premium one?

Right now I am using a Digital Persona 4000 but it more often than not
cannot match the user.
In this case, 15 mismatches and 5 correct matches.

See below.

I guess the reader is just of a too poor quality and would like to buy a
good one instead.

Regards,
Jimmy


root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
VerifyStart failed: Connection was disconnected before a reply was received
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
VerifyStart failed: Connection was disconnected before a reply was received
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
VerifyStart failed: Connection was disconnected before a reply was received
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
VerifyStart failed: Connection was disconnected before a reply was received
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-no-match (done)
root at Zotac:~# fprintd-verify
Using device /net/reactivated/Fprint/Device/0
Listing enrolled fingers:
 - #0: right-index-finger
Verify result: verify-match (done)



On Wed, Jul 30, 2014 at 10:06 AM, Martin Hejnfelt <martin at duffman.dk> wrote:

> Hi Jimmy,
>
> fprint can indeed do this, I am myself using it for this task. I am not
> near the source code nor a regular computer, however you can load the
> prints into a zero terminated array and give it to a function
> (fprint_verify or something in that direction) whose output, in case of a
> correct match, will be the index into the array for the matched print.
>
> Sorry for the formatting, writing this from my phone...
>
> Regards,
> Martin Hejnfelt
>
>
> -------- Oprindelig meddelelse --------
> Fra: Jimmy Jeppesen
> Dato:30/07/2014 09.47 (GMT+01:00)
> Til: fprint at lists.freedesktop.org
> Emne: [fprint] 1-n matching?
>
> Hi
>
> I am writing an application that will need to read a fingerprint and then
> compare this to a series of previously scanned images and report back which
> file matched.
>
> The matched file then corresponds to a given user and I can proceed from
> there.
>
> I have googled high and low, and it seems like libfprint is not suited for
> this purpose - Am I right? :-)
>
> If not, which programs do I need (or which parameters to frpintd-verify)?
>
> Thanks,
> Jimmy
>
> ps, thanks for the help with installation - It was indeed the Debian
> version on APT that was too old and a hand.compiled version worked out of
> the box.
>
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