DETERMINING FINGERPRINT SCANNING MODE FROM CAPACITIVE TOUCH SENSOR PROXIMATE TO LENS

摘要

A photography subsystem is configured to be operated in fingerprint scanning mode and a normal mode. An autofocus module may be initialized to control a lens with an initial focal length set according to received instructions indicating one of the modes of operation. An image signal processor associated with the photography subsystem may process images received from the photography subsystem and, if necessary, process the images to form a candidate digital fingerprint for use in an authentication process.

主权项

1. A method of operating a photography subsystem connected, via a communication interface, to an image processor, the method comprising:
receiving input from a finger on a capacitive touch sensor proximate to a lens; responsive to the receiving, determining that the photography subsystem is to be operated in fingerprint scanning mode; operating the photography subsystem in fingerprint scanning mode, wherein operating the photography subsystem in fingerprint scanning mode includes:
initializing an autofocus module to control the lens with an initial focal length set for capturing a fingerprint from the finger; andtriggering, via the communication interface, the image processor to employ digital processing techniques to achieve near field focus; receiving, from an image sensor, a digital image; and storing the digital image in a memory.