I've heard that fprint matching doesn't work well with small sensors. In my case (issue #162 <https://gitlab.freedesktop.org/libfprint/libfprint/-/issues/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 <https://www.youtube.com/watch?v=FgbYrSOy3oQ> shows exactly that.
When running enroll and then verify examples, I get "score 0" on every verify. Basically, my questions are: 1. Is this a small sensor problem and is there really too little minutiae? 2. What is the state of small sensors matching? Are there any working drivers for small sensors? 3. How much minutiae is enough to work? 4. 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? 5. What are other options to make my device work, maybe by using multiple images?
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