公开(公告)号：US20140016837A1

公开(公告)日：2014-01-16

申请号：US14033802

申请日：2013-09-23

Applicant: Google Inc.

Inventor： Michael Christian Nechyba ,  Henry Will Schneiderman ,  Michael Andrew Sipe

IPC: G06K9/00

CPC classification number: G06K9/00228 ,  G06K9/00221 ,  G06K9/00281 ,  G06K9/00315 ,  G06K9/00906

Abstract: An example method includes receiving a first image and a second image of a face of a user, where one or both images have been granted a match by facial recognition. The method further includes detecting a liveness gesture based on at least one of a yaw angle of the second image relative to the first image and a pitch angle of the second image relative to the first image, where the yaw angle corresponds to a transition along a horizontal axis, and where the pitch angle corresponds to a transition along a vertical axis. The method further includes generating a liveness score based on a yaw angle magnitude and/or a pitch angle magnitude, comparing the liveness score to a threshold value, and determining, based on the comparison, whether to deny authentication to the user with respect to accessing one or more functionalities controlled by the computing device.

公开(公告)号：US20140307929A1

公开(公告)日：2014-10-16

申请号：US14315100

申请日：2014-06-25

Applicant: Google, Inc.

Inventor： Michael Christian Nechyba ,  Henry Will Schneiderman ,  Michael Andrew Sipe

IPC: G06K9/00

CPC classification number: G06K9/00228 ,  G06K9/00221 ,  G06K9/00281 ,  G06K9/00315 ,  G06K9/00906

Abstract: An example method includes receiving a first image and a second image of a face of a user, where one or both images have been granted a match by facial recognition. The method further includes detecting a liveness gesture based on at least one of a yaw angle of the second image relative to the first image and a pitch angle of the second image relative to the first image, where the yaw angle corresponds to a transition along a horizontal axis, and where the pitch angle corresponds to a transition along a vertical axis. The method further includes generating a liveness score based on a yaw angle magnitude and/or a pitch angle magnitude, comparing the liveness score to a threshold value, and determining, based on the comparison, whether to deny authentication to the user with respect to accessing one or more functionalities controlled by the computing device.

Abstract translation: 示例性方法包括接收用户脸部的第一图像和第二图像，其中一个或两个图像已经通过面部识别被授予匹配。 该方法还包括基于第二图像相对于第一图像的偏航角和相对于第一图像的第二图像的俯仰角中的至少一个来检测活动姿势，其中偏航角对应于沿着 水平轴，并且其中俯仰角对应于沿着垂直轴的转变。 该方法还包括基于偏航角幅度和/或俯仰角幅度生成活动分数，将活动分数与阈值进行比较，以及基于比较确定是否拒绝对用户进行访问的认证 由计算设备控制的一个或多个功能。