<div dir="ltr"><div><div><div>Hi Dan,<br><br></div>Thanks for confirmation, I thought it was just AES3500 performs badly. <br><br>Is it the matching approach (i.e. minuates detection and matching in NBIS) that poses a limitation on verification of these kind devices?<br>
<br></div>Is the Windows driver using a completely different approach on verification?<br><br></div>Sorry, my experiences are very limited, would very much like to get your advice! Thanks!<br></div><div class="gmail_extra">
<br clear="all"><div>best,<br>--<br>jv ♫<br><div>m: (+86) 156 5238 4808</div></div>
<br><br><div class="gmail_quote">On Wed, May 8, 2013 at 10:03 PM, Daniel Drake <span dir="ltr"><<a href="mailto:dan@reactivated.net" target="_blank">dan@reactivated.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
El 08/05/13 02:54, Juvenn Woo escribió:<div class="im"><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear all,<br>
<br>
I'm submitting the AES3500 driver for peers to review.<br>
<br>
The AES3500 is a pretty old fingerprint device produced by AuthenTech. It<br>
possesses a *press-typed* sensor of dimension in 128x128. Which is<br>
similiar to AES4000, except the later is in 96x96.<br>
<br>
The driver is a deriative work of Daniel Drake's AES4000 driver, with a<br>
few parameters tuned for AES3500. While there seems no problem scanning<br>
fingerprint images with it, the verification rate is pretty low at the<br>
moment.<br>
</blockquote>
<br></div>
The AES4000 driver performs badly as well. As you've commented, the likely problem is that only a tiny area of the finger is sampled.<br>
<br>
I imagine the windows driver (where the sensor seems to perform OK) has a fingerprint processing engine heavily tuned to small amounts of data. It's probably quite insecure as a result.<br>
<br>
Thanks for the contribution!<span class="HOEnZb"><font color="#888888"><br>
<br>
Daniel<br>
<br>
<br>
<br>
</font></span></blockquote></div><br></div>