Patent ID: 9025830
Filing Date: 2015-05-05
Classification: G06K

Abstract:
1. A liveness detection method, comprising: receiving plural pictures of a video stream comprising a face and an adjacent background; determining motion of both the face and the background, the motion determined over the plural pictures, wherein determining the motion of both the face and the background comprises: dividing the pictures into plural sub-units of one or more predetermined sizes; and implementing motion estimation for at least one of the plural sub-units between the plural pictures; comparing the motion between the face and the background, wherein comparing the motion between the face and the background comprises comparing a magnitude and direction of the motion for plural sub-units of the face with a magnitude and direction of the motion for plural sub-units of the background, wherein the magnitude and direction are based on motion estimation of the plural sub-units of the face and the background; and determining whether the face corresponds to an actual, live user or an image of the user based on the comparison, the determinations performed by a processor, wherein determining whether the face corresponds to the actual, live user or the image of the user comprises determining whether or not there is a threshold degree of similarity in the magnitude and direction of the motion of the plural sub-units motion of the face compared to the background.