Hello, On Sat, 04 May 2013 17:27:12 +0100 Tom Chiverton <tom+fpr...@falkensweb.com> wrote:
> On Saturday 04 May 2013 18:15:29 Paul Sokolovsky wrote: > > Some thinking helped though. First of all, AES3500 cannot capture a > > *fingerprint*, it just physically too small for that. It can capture > > only small sub-area of it, then depending on how exactly you put > > your finger on it, areas will be rather different, likely straining > > NBIS. As a fingerprinting layman, I also put my index finger's tip > > on the sensor, and the tip contains almost parallel lines, and > > probably lacks enough features to recognize. Shape of my APC Biopod > > kinda > > I've not even wikipedia'ed it, admittedly, but rather thought fprint > was stitching together a series of snap shots taken as you move your > finger down across the face of the camera. > > Much like a panorama feature in many cameras... Yeah, I'd think that's definitely how "narrow slot" type fingerprint readers work - you swipe a finger across the sensor. But there're also those which has large enough area where you just press finger against. AES3500 would look like this second type (photo of my device: http://www.strobey.co.uk/pics/aes3400/biopod.jpg) - except that well, sensor area 6.5x6.5mm is a bit too small to capture big enough part of entire fingerprint, which leads to a repeatable finger positioning problems. I tried to swipe a finger against it too, but nope, fprint_demo captures just square image on first contact. -- Best regards, Paul mailto:pmis...@gmail.com _______________________________________________ fprint mailing list fprint@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/fprint
