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Liveness and impersonation detection with ultrasonic fingerprint sensors

A fingerprint sensor, ultrasonic technology, applied in the field of image processing, can solve the problem that ordinary sensors are difficult to confirm

Active Publication Date: 2022-03-29
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even though a fingerprint reader can be considered to be able to reliably determine the presence or absence of a matching fingerprint pattern, ensuring that the matching pattern is taken from a real, live finger is just as critical to overall system security as is the case with many common sensor sensors. may be difficult to confirm

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  • Liveness and impersonation detection with ultrasonic fingerprint sensors
  • Liveness and impersonation detection with ultrasonic fingerprint sensors
  • Liveness and impersonation detection with ultrasonic fingerprint sensors

Examples

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Embodiment Construction

[0026] Embodiments of devices and methods for detecting counterfeit fingers are disclosed. The following description is presented to enable any person skilled in the art to make and use the present disclosure. Descriptions of specific embodiments and applications are provided by way of example only. Various modifications and combinations of the examples described herein will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other examples and applications without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples described and shown, but is to be accorded a scope consistent with the principles and features disclosed herein. The word "exemplary" or "instance" is used herein to mean "serving as an example, instance, or illustration." Any aspect or embodiment described herein as "exemplary" or "example" should not necessarily be construed a...

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Abstract

Embodiments of an apparatus and method for detecting an impostor's finger are disclosed. In one embodiment, an ultrasonic fingerprint sensor includes: an ultrasonic transmitter configured to transmit ultrasonic waves to a finger; an ultrasonic sensor array configured to receive reflected ultrasonic waves from the finger; and a controller configured to The difference between the average amplitudes of the reflected ultrasonic waves from the ridges and valleys of the finger determines the reflected acoustic energy of the finger and is determined based at least in part on the reflected acoustic energy of the finger Whether the finger is an impostor.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of US Non-Provisional Application No. 15 / 432,125, "Active and Counterfeit Detection for Ultrasonic Fingerprint Sensors," filed February 14, 2017, which claims US Provisional Application No. 62 / 295,490, Interest in "Activity Testing." The entire contents of the aforementioned US patent applications are hereby incorporated by reference. technical field [0003] The present disclosure relates to the field of image processing. In particular, the present disclosure relates to devices and methods for detecting counterfeit fingers. Background technique [0004] Fingerprint sensing and matching is a common technology used for personal identification or verification. For example, one method of fingerprinting involves scanning a sample fingerprint or image using a biometric reader / sensor, and storing the image and / or unique characteristics of the fingerprint image. The characteristics of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06V40/13G06V40/40
CPCG06V40/1394G06V40/1306G06V40/1382G06V40/1376
Inventor 梅厄·阿加西博阿茨·卡斯特罗阿里耶·莱纳贾勒·罗特姆利兰·加利利内森·阿尔特曼
Owner QUALCOMM INC