公开(公告)号：US20150237595A1

公开(公告)日：2015-08-20

申请号：US14509189

申请日：2014-10-08

Applicant: Google Inc.

Inventor： Etienne Le Grand ,  Brian Patrick Williams

IPC: H04W64/00 ,  H04W4/04 ,  G01S19/01

CPC classification number: H04W64/003 ,  G01S5/0252 ,  G01S19/01 ,  H04W4/04 ,  H04W64/006 ,  H04W88/08

Abstract: Examples describe systems and methods for iteratively determining a signal strength map for a wireless access point (AP) aligned to position coordinates, positions of a device, and positions of the wireless APs. An example method includes selecting traces and a wireless AP among the traces for which data is indicative of a threshold amount of information to estimate a position of the device and a position of the wireless AP, selecting first characteristics from the traces to remain constant and second characteristics to be variable, and selecting a localization constraint that provides boundaries on the position of the device and the position of the wireless AP. The method also includes performing a simultaneous localization and mapping (SLAM) optimization of the position of the device and the position of the wireless AP based on the localization constraint with the first characteristics held constant and the second characteristics allowed to vary.

Abstract translation: 示例描述用于迭代地确定与位置坐标，设备的位置和无线AP的位置对准的无线接入点（AP）的信号强度图的系统和方法。 示例性方法包括在迹线中选择迹线和无线AP，数据指示阈值信息量以估计设备的位置和无线AP的位置，从迹线中选择第一特性以保持恒定，并且第二 特征是可变的，并且选择在设备的位置和无线AP的位置上提供边界的定位约束。 该方法还包括基于定位约束执行设备的位置和无线AP的位置的同时定位和映射（SLAM）优化，其中第一特性保持恒定，并且允许第二特性变化。

公开(公告)号：US20150161434A1

公开(公告)日：2015-06-11

申请号：US14100704

申请日：2013-12-09

Applicant: Google Inc.

Inventor： Steven James Ross ,  Brian Patrick Williams ,  Henry Will Schneiderman ,  Michael Christian Nechyba

IPC: G06K9/00

CPC classification number: G06K9/00288 ,  G06F21/32 ,  G06K9/00268

Abstract: Facial recognition can be used to determine whether or not a user has access privileges to a device such as a smartphone. It may be possible to spoof an authenticated user's image using a picture of the user. Implementations disclosed herein utilize time of flight and/or reflectivity measurements of an authenticated user to compare to such values obtained for an image of an object. If the time of flight distance and/or reflectivity distance for the object match a measured distance, then the person (i.e., object) may be granted access to the device.

Abstract translation: 可以使用面部识别来确定用户是否具有诸如智能电话的设备的访问权限。 可以使用用户的图片欺骗认证的用户的图像。 本文公开的实施方式利用已验证用户的飞行时间和/或反射率测量值来比较对于对象的图像获得的这些值。 如果对象的飞行距离和/或反射距离与测量距离相匹配，则可以允许人（即，对象）访问设备。