Patent ID: 8965064
Filing Date: 2015-02-24
Classification: G06K

Abstract:
1. A method of acquiring artifact-free biometric images of an eye in relative motion with a sensor, and in the presence of partially-reflective eyewear, the method comprising: (a) acquiring, by a first sensor having a first optical axis, a first image of an eye while the eye is illuminated by a first illuminator, the first image including a region of interest, the first sensor disposed at a fixed displacement from the first illuminator and a second sensor disposed at a separation distance S from the first sensor and having a second optical axis; (b) acquiring, by the second sensor within a predetermined period of time from the acquisition of the first image, a second image of the eye, the second image including the region of interest; and (c) determining if at least one of the first and second images include artifacts arising from one or both of the first illuminator and eyewear, within the region of interest, wherein the first optical axis and the second optical axis converge at a distance D between the eye and a midpoint between the first sensor and the second sensor and the first sensor and the second sensor are substantially at or below an angle of arcTan(0.5*S/D) from a line connecting the eye and the midpoint between the first sensor and second sensor.