On Fri, Jun 12, 2020 at 8:05 AM Indev <inde...@gmail.com> wrote: > > I've heard that fprint matching doesn't work well with small sensors. > > In my case (issue #162), the device returns 114x57 images and there is > probably not much minutiae to extract. I am certain that it is a press > sensor, even though it returns multiple images during communication. Despite > the fact that it's hard to find any specification for the device, Acer Swift > 3 promo shows exactly that. > > When running enroll and then verify examples, I get "score 0" on every verify. > > Basically, my questions are: > > Is this a small sensor problem and is there really too little minutiae? > What is the state of small sensors matching? Are there any working drivers > for small sensors?
It's in very early stages. I've opened 2 issues recently: [1] [2] I'm slowly working on 1st and I don't have any timeframe on when it'll be ready. Basically I'm working on it in my spare time and it's not the only hobby project I'm working on right now. > How much minutiae is enough to work? I'd say at least 10-15 > In my driver code, how can i check minutiae count before calling > fpi_image_device_image_captured, for example, to prevent submitting images > with low minutiae count? It's in generic code, not in driver. Moreover I expect it to be impossible to extract minutiae for every image that you get off the sensor - it's quite CPU-intensive process. > What are other options to make my device work, maybe by using multiple images? Help with [1] and [2] or do your own research on fingerprint matching for small area sensors and start a new discussion? Regards, Vasily [1] https://gitlab.freedesktop.org/libfprint/libfprint/-/issues/271 [2] https://gitlab.freedesktop.org/libfprint/libfprint/-/issues/272 > > _______________________________________________ > fprint mailing list > fprint@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/fprint _______________________________________________ fprint mailing list fprint@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/fprint
