Hi Rosaria, unfortunately we don't have any fingerprint recognition examples in skimage. Various things like thresholding (skimage.filters.threshold_*), edge detection (also in skimage.filters), and feature extraction (skimage.feature) would be useful, but you would need to piece them together yourself. It would be awesome if you could send a link to a blog post or github repo when you have something working! We would be very happy to link to it from scikit-image or include it in our documentation (with your permission of course!).