[fprint] == fprint issue UrU 40000 ==

[Alexander]

Hi,

While working with libfprint (and fprint-demo), libfprint has a hard
time to match the same fingerprint.
I have to scan the same fingerprint several times (at least 10 times) to
have a match and i have to be precise in positioning the fingerprint.
I have 3 fingerprint (they are the same as you can see), the enrolled
and the matched fingerprint and the non matched.
We can see clearly (i hope it is attached correctly), they are the same,
and have slight offsets and libfprint cannot match.
I have tested it on Fedora core 7 (x86_64) and Ubuntu with the same
results, also the device works just fine on Vista.
I have noticed that the thumb fingerprint is easier to get matched, and
cover almost all sensor area.

I wonder if someone has have the same problem with the authentec
sensors, since the aes image is far superior?

What could be done to improve the matching algorithm? Without writing my
one of course...

Cheers,

xfinger
=====

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.reactivated.net/pipermail/fprint/attachments/20080411/92b3030f/attachment-0001.html
-------------- next part --------------
A non-text attachment was scrubbed...
Name: enrolled.png
Type: image/png
Size: 69025 bytes
Desc: not available
Url : http://lists.reactivated.net/pipermail/fprint/attachments/20080411/92b3030f/enrolled-0001.png
-------------- next part --------------
A non-text attachment was scrubbed...
Name: verify.png
Type: image/png
Size: 71355 bytes
Desc: not available
Url : http://lists.reactivated.net/pipermail/fprint/attachments/20080411/92b3030f/verify-0001.png
-------------- next part --------------
A non-text attachment was scrubbed...
Name: verify-no_match.png
Type: image/png
Size: 68087 bytes
Desc: not available
Url : http://lists.reactivated.net/pipermail/fprint/attachments/20080411/92b3030f/verify-no_match-0001.png