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https://gitlab.freedesktop.org/libfprint/libfprint.git
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19375e57cb
Implements a Match-on-Host driver for the FocalTech FT9362 fingerprint sensor (USB 0x2808:0xc652). The driver uses FpDevice with a custom NCC-based matcher instead of NBIS, as the 64x80 sensor at 188 DPI does not yield enough minutiae for reliable NBIS matching. Enroll captures 10 images stored individually in FpPrint as a raw byte array. Verify performs a single capture and computes normalized cross-correlation with a ±10px search window against each enrolled template; the maximum NCC score across all templates is compared against a threshold of 0.50 to report match or no-match. Identify applies the same NCC approach across all prints in the gallery and returns the best-matching one above the threshold. Add an umockdev driver test using a synthetic pcapng recording (gradient image, NCC=1.0) that covers open, enroll (10 stages), and verify.
57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
#!/usr/bin/python3
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import traceback
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import sys
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import gi
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gi.require_version('FPrint', '2.0')
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from gi.repository import FPrint, GLib
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# Exit with error on any exception, included those happening in async callbacks
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sys.excepthook = lambda *args: (traceback.print_exception(*args), sys.exit(1))
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ctx = GLib.main_context_default()
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c = FPrint.Context()
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c.enumerate()
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devices = c.get_devices()
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d = devices[0]
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del devices
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assert d.get_driver() == "focaltech"
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assert not d.has_feature(FPrint.DeviceFeature.CAPTURE)
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assert d.has_feature(FPrint.DeviceFeature.IDENTIFY)
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assert d.has_feature(FPrint.DeviceFeature.VERIFY)
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assert not d.has_feature(FPrint.DeviceFeature.DUPLICATES_CHECK)
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assert not d.has_feature(FPrint.DeviceFeature.STORAGE)
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assert not d.has_feature(FPrint.DeviceFeature.STORAGE_LIST)
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assert not d.has_feature(FPrint.DeviceFeature.STORAGE_DELETE)
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assert not d.has_feature(FPrint.DeviceFeature.STORAGE_CLEAR)
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d.open_sync()
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template = FPrint.Print.new(d)
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def enroll_progress(*args):
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print("finger status: ", d.get_finger_status())
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print('enroll progress: ' + str(args))
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# Enroll, then verify
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print("enrolling")
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assert d.get_finger_status() == FPrint.FingerStatusFlags.NONE
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p = d.enroll_sync(template, None, enroll_progress, None)
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assert d.get_finger_status() == FPrint.FingerStatusFlags.NONE
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print("enroll done")
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print("verifying")
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assert d.get_finger_status() == FPrint.FingerStatusFlags.NONE
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verify_res, verify_print = d.verify_sync(p)
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assert d.get_finger_status() == FPrint.FingerStatusFlags.NONE
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print("verify done")
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assert verify_res == True
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d.close_sync()
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del d
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del c
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