Adaptive Fingerprint-Enrollment to Finger Characteristics Using Local Under-Display Fingerprint Sensor in an Electronic Device

A mobile electronic device comprising:

• a touch-display device;
• a local under-display fingerprint sensor located under the touch-display device and having an active area that is smaller than a typical size of a fingerprint of a user, the local under-display fingerprint sensor configured to capture, at a location corresponding to the active area, a fingerprint image of a portion of the fingerprint of a finger of the user when the user's finger is touching the touch-display device at the location of the active area;
• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the one or more processors to implement an adaptive-enrollment module to:
• determine one or more characteristics of the fingerprint based on the fingerprint image;
• provide an adaptive-enrollment scheme adapted to the one or more characteristics of the fingerprint of the user during enrollment of the fingerprint, the adaptive enrollment scheme adapted based on adjusting a number of enrollment touches and target locations of the enrollment touches, based on the one or more characteristics of the fingerprint, for enrolling the fingerprint in a fingerprint-enrollment system;
• and
• provide visual guidance and feedback to guide the user through a sequence of target locations for placing their finger to provide enrollment touches, the visual guidance including a first visual guide provided via the touch-display device at the location corresponding to the active area of the of the local under-display fingerprint sensor, the visual guidance provided based the adjusted number and the target locations of the enrollment touches to indicate a sequence of locations on the touch-display device for the user to touch with the user's finger to complete enrollment of the fingerprint with the adjusted number of enrollment touches.

A computer-readable medium comprising instructions which, when executed by one or more processors, cause the one or more processors to:

• provide a first visual guide via a touch-display device and at a location corresponding to an active area of a local under-display fingerprint sensor, the active area being smaller than a typical size of a fingerprint of a user;
• capture a first fingerprint image of a portion of the fingerprint of a finger of the user, the user's finger touching the touch-display device at the location of the first visual guide;
• determine a fingerprint contact region of the user's finger touching the touch-display device and, based on the fingerprint contact region, one or more characteristics corresponding to the fingerprint;
• adjust, based on the one or more characteristics of the fingerprint, a number of enrollment touches and target locations of the enrollment touches for enrolling the fingerprint in a fingerprint-enrollment system;
• and
• provide visual guidance, based on the adjusted number and target locations of the enrollment touches, to indicate a sequence of locations on the touch-display device for the user to touch with the user's finger to complete enrollment of the fingerprint with the adjusted number of enrollment touches.