公开(公告)号：US09195879B1

公开(公告)日：2015-11-24

申请号：US14474163

申请日：2014-08-31

Applicant: QUALCOMM Incorporated

Inventor： Eliza Yingzi Du ,  Ming Yu Chen ,  Esra Vural ,  Kwokleung Chan ,  Suryaprakash Ganti ,  John Keith Schneider ,  David William Burns

IPC: G06K9/00

CPC classification number: G06T5/20 ,  G06K9/0002 ,  G06K9/00067 ,  G06K9/00926

Abstract: A fingerprint sensing apparatus may include a fingerprint sensor system and a control system capable of receiving fingerprint sensor data from the fingerprint sensor system. The control system may be capable of determining fingerprint sensor data blocks for at least a portion of the fingerprint sensor data and of calculating statistical variance values for fingerprint sensor data corresponding to each of the fingerprint sensor data blocks. The control system may be capable of determining, based at least in part the statistical variance values, whether an object is positioned proximate a portion of the fingerprint sensor system.

Abstract translation: 指纹感测装置可以包括指纹传感器系统和能够从指纹传感器系统接收指纹传感器数据的控制系统。 控制系统可以能够为指纹传感器数据的至少一部分确定指纹传感器数据块，并且可以计算对应于每个指纹传感器数据块的指纹传感器数据的统计方差值。 控制系统可以能够至少部分地基于统计方差值来确定物体是否位于指纹传感器系统的一部分附近。

公开(公告)号：US09633269B2

公开(公告)日：2017-04-25

申请号：US14845174

申请日：2015-09-03

Applicant: QUALCOMM Incorporated

Inventor： Jin Gu ,  Ming Yu Chen ,  Eliza Yingzi Du ,  Kwokleung Chan ,  Esra Vural ,  Saurav Bandyopadhyay

IPC: G06K9/46 ,  G06K9/00 ,  G06T7/32 ,  G06T7/33 ,  G06T7/44

CPC classification number: G06K9/00906 ,  G06K9/0002 ,  G06K9/00093 ,  G06K9/001 ,  G06K9/00107 ,  G06K9/00114 ,  G06T7/32 ,  G06T7/337 ,  G06T7/344 ,  G06T7/44 ,  G06T2207/10132 ,  G06T2207/20064 ,  G06T2207/20072

Abstract: A liveness-detection method and/or system is disclosed. A method of detecting liveness can comprise obtaining a single ultrasonic image of a biometric object. The single ultrasonic image can be subdivided into a plurality of overlapping sample blocks. Feature vectors can be extracted in a spatial domain and a frequency domain from each of the plurality of sample blocks. The feature vectors can be compared from each of the plurality of sample blocks to a classification model.

公开(公告)号：US20160063300A1

公开(公告)日：2016-03-03

申请号：US14474160

申请日：2014-08-31

Applicant: QUALCOMM Incorporated

Inventor： Eliza Yingzi Du ,  Ming Yu Chen ,  Esra Vural ,  Kwokleung Chan ,  Suryaprakash Ganti ,  John Keith Schneider ,  David William Burns

IPC: G06K9/00

CPC classification number: G06K9/00033 ,  G06K9/00013 ,  G06K9/00067 ,  G06K9/00087 ,  G06K9/0012

Abstract: A fingerprint sensing apparatus includes a fingerprint sensor system and a control system capable of receiving fingerprint sensor data from the fingerprint sensor system. The control system may determine, according to the fingerprint sensor data, whether an object is positioned proximate a portion of the fingerprint sensor system. If the control system determines that an object is positioned proximate the portion of the fingerprint sensor system, the control system may determine whether the object is a finger or a non-finger object. The control system may determine whether the fingerprint sensor data includes fingerprint image information of at least an image quality threshold.

Abstract translation: 指纹感测装置包括指纹传感器系统和能够从指纹传感器系统接收指纹传感器数据的控制系统。 控制系统可以根据指纹传​​感器数据确定物体是否位于指纹传感器系统的一部分附近。 如果控制系统确定对象位于指纹传感器系统的部分附近，则控制系统可以确定对象是手指还是非手指对象。 控制系统可以确定指纹传感器数据是否包括至少图像质量阈值的指纹图像信息。

公开(公告)号：US20160063294A1

公开(公告)日：2016-03-03

申请号：US14474164

申请日：2014-08-31

Applicant: QUALCOMM Incorporated

Inventor： Eliza Yingzi Du ,  Ming Yu Chen ,  Esra Vural ,  Kwokleung Chan ,  Suryaprakash Ganti ,  John Keith Schneider ,  David William Burns

IPC: G06K9/00

CPC classification number: G06K9/0002 ,  G06K9/00013 ,  G06K9/00033 ,  G06K9/00067

Abstract: A fingerprint sensing apparatus may include a fingerprint sensor system and a control system. The fingerprint sensor system may include an ultrasonic sensor array. The control system may be capable of receiving fingerprint sensor data from the fingerprint sensor system and of determining whether an object is positioned proximate a portion of the fingerprint sensor system. The control system may be capable of determining an acoustic impedance of at least a portion of an object that is positioned proximate the fingerprint sensor system. The control system may be capable of determining whether the acoustic impedance is within an acoustic impedance range corresponding to that of skin and of determining, based at least in part on the acoustic impedance, whether the object is a finger.

Abstract translation: 指纹感测装置可以包括指纹传感器系统和控制系统。 指纹传感器系统可以包括超声波传感器阵列。 控制系统可能能够从指纹传感器系统接收指纹传感器数据，并且确定物体是否位于指纹传感器系统的一部分附近。 控制系统可以能够确定位于指纹传感器系统附近的物体的至少一部分的声阻抗。 控制系统可以能够确定声阻抗是否在对应于皮肤阻抗的声阻抗范围内，并且至少部分地基于声阻抗来确定对象是手指。