Hi Jimmy, The functions we talk about are part of the library, its C functions that you can use if you're programming up against libfprint not fprintd. Thus you need to do some programming yourself as far as I know (I've never used fprintd only libfprint in my own C/C++ program).
I use a Digital Persona U.are.U 4500 which seem to give me pretty acceptable results. I find that the initial enrollment quality is quite important, and on the 4500 it seems I get the best results when I press the whole finger firmly onto the reader not just put it there lightly. I have however yet to see it work in a production environment which however should happen within some weeks. Regards, Martin Hejnfelt <div>-------- Oprindelig meddelelse --------</div><div>Fra: Jimmy Jeppesen <ji...@mobi.dk> </div><div>Dato:30/07/2014 10.21 (GMT+01:00) </div><div>Til: Martin Hejnfelt <mar...@duffman.dk> </div><div>Cc: Jimmy Jeppesen <ji...@mobi.dk>,fprint@lists.freedesktop.org </div><div>Emne: Re: [fprint] 1-n matching? </div><div> </div>Thanks to both of you! :-) However, I don't seem to have fprint-identity installed: root@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@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@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@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@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@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@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@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@Zotac:~# fprintd-verify Using device /net/reactivated/Fprint/Device/0 Listing enrolled fingers: - #0: right-index-finger Verify result: verify-no-match (done) root@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 <mar...@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@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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