[fprint] libfprint modified some process for Payroll system.

[Artem Egorkine]

Dear Kenneth,

It is quite common to build systems on top of libfprint that log in users
based on fingerprint alone. Many users also requested the ability to store
fingerprint data in an external database and have more than one fingerprint
per finger per user. All that is available in libfprint one way or the other
-- the API is broad enough and does not require any modifications to either
uru4000 driver or the libfrint library.

It is interesting that you enroll two fingerprints and select the better one
based on verification minutae count. In my system we allow to store an
arbitrary number of fingerprints per user. I found that storing 3 prints per
finger is good enough, but I have very few users. It would be interesting to
see if it works reliably with 200/400 prints (I am concerned with false
positives).

PS. I also use uru4000.

Regards,
Artem

On Tue, Feb 24, 2009 at 5:06 AM, Kenneth Navarro <knightsream at gmail.com>wrote:

> Hi all,
>
> we have a project in our company using biometric. The project is base on
> the Payroll system. i came up with this libfprint using an uru4000 finger
> scanner.  well it help me alot. i made some changes on the driver together
> wit the libfrpint module. The process i made is that we allowed many user to
> register on the system, 2 finger prints each user, in the enrollment system
> i added a feature which the user must verify the finger 3 times and i get
> the maximum minutae score and this one is i store on the user finger print.
> in the verification system the process is that it only check the finger
> print and it will return the userid of that finger print.. And now we are on
> the dry run testing, we have 200 (400 finger print) user register on the
> system logging in and out., well i hope right now is that i can share my
> source code and check if it is working with other device specially with
> zk6000 but i searched the entire net and found out that there still no
> driver forr this device under linux.. sorry for my bad english.
>
>
> Kenneth Navarro
>
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