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Currently the following warnings are signalled:
The finger positioning signals are stored in the finger failure mask. Its value is reported in the Fingers captured event or can be acquired by reading the fg_fail_mask property. The FPS_FAILURE
enumeration contains its error flag bits.
Testing the hang out and counting the fingers are essential parts of the capture process. The hang out fingers can have good quality but should not be stored as best ones. If the finger count is not the set number, it is hard to find out the correct finger positions; hence the fingers are not stored.
The hand swap test can be turned on/off with the finger/check_hand property. This test gives signal only when the four fingers of the scanned hand are present.
The upright position test can be turned on/off with the finger/check_upright property. Its value is the maximal angle of fingers in radians. A negative value turns off the test.