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    SYSTEM AND METHOD FOR OBJECT POSITION ESTIMATION BASED ON ULTRASONIC REFLECTED SIGNALS
    12.
    发明申请
    SYSTEM AND METHOD FOR OBJECT POSITION ESTIMATION BASED ON ULTRASONIC REFLECTED SIGNALS 有权
    基于超声反射信号的对象位置估计系统与方法

    公开(公告)号：US20130301391A1

    公开(公告)日：2013-11-14

    申请号：US13885677

    申请日：2011-11-16

    Applicant: QUALCOMM Incorporated

    Inventor： Nathan Altman ,  Yossef Tsfaty ,  Meir Agassy

    IPC: G01S15/08

    CPC classification number: G01S15/08 ,  G01S13/003 ,  G01S13/32 ,  G01S15/003 ,  G01S15/32

    Abstract: A system for small space positioning comprises a transmitting element at a fixed and known location, which transmitting a modulated continuous wave, for example an ultrasonic wave, having a continuous carrier signal part and a base-band signal modulated thereon. The transmitting element transmits the modulated continuous wave over a range in which an object to be positioned may appear. A receiving element receives signals transmitted by the transmitting device and reflected by the object, and a position detection element determines a position of the object from analysis of both the carrier signal part and the base-band signal received from the reflected signal.

    Abstract translation: 用于小空间定位的系统包括在固定和已知位置处的发射元件，其传输具有调制在其上的连续载波信号部分和基带信号的经调制的连续波，例如超声波。 发送元件将被调制的连续波发送到可能出现定位对象的范围。 接收元件接收由发送设备发送并被对象反射的信号，并且位置检测元件根据从反射信号接收到的载波信号部分和基带信号的分析来确定对象的位置。

    Liveness and spoof detection for ultrasonic fingerprint sensors
    13.
    发明授权
    Liveness and spoof detection for ultrasonic fingerprint sensors 有权

    公开(公告)号：US10262188B2

    公开(公告)日：2019-04-16

    申请号：US15432125

    申请日：2017-02-14

    Applicant: QUALCOMM Incorporated

    Inventor： Meir Agassy ,  Boaz Castro ,  Arye Lerner ,  Gal Rotem ,  Liran Galili ,  Nathan Altman

    IPC: G06K9/00

    Abstract: Embodiments of apparatuses and methods for detecting a spoof finger are disclosed. In one embodiment, an ultrasonic fingerprint sensor comprises an ultrasonic transmitter configured to transmit an ultrasonic wave to a finger, an ultrasonic sensor array configured to receive a reflected ultrasonic wave from the finger, and a controller configured to determine a reflected acoustic energy of the finger based on a difference between average amplitudes of the reflected ultrasonic wave from ridges and valleys of the finger; and determine whether the finger is a spoof based at least in part on the reflected acoustic energy of the finger.

    Ultrasonic fingerprint anti-spoofing based on A-line data
    19.
    发明授权
    Ultrasonic fingerprint anti-spoofing based on A-line data 有权

    公开(公告)号：US12033422B1

    公开(公告)日：2024-07-09

    申请号：US18186865

    申请日：2023-03-20

    Applicant: QUALCOMM Incorporated

    Inventor： Adi Hendel ,  Nathan Altman ,  Bence Major ,  Javier Frydman ,  Hasib Siddiqui

    IPC: G06K9/00 ,  G06F21/32 ,  G06V10/82 ,  G06V40/12 ,  G06V40/13 ,  G06V40/40 ,  G06V40/50

    CPC classification number: G06V40/1306 ,  G06F21/32 ,  G06V10/82 ,  G06V40/1376 ,  G06V40/45 ,  G06V40/50

    Abstract: Some disclosed methods involve obtaining current A-line data corresponding to reflections of ultrasonic waves from a target object detected by a single receiver pixel, obtaining current ultrasonic fingerprint image data corresponding to reflections of ultrasonic waves from a target object surface, obtaining previously-obtained A-line data that was previously obtained from an authorized user, and obtaining previously-obtained ultrasonic fingerprint image data that was previously obtained from the authorized user. Some disclosed methods involve estimating, based at least in part on the current A-line data, the previously-obtained A-line data, the current ultrasonic fingerprint image data and the previously-obtained ultrasonic fingerprint image data, whether the target object is a finger of the authorized user. The estimation may involve an anti-spoofing process based at least in part on the current A-line data and the previously-obtained A-line data.

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