公开(公告)号：US10755067B2

公开(公告)日：2020-08-25

申请号：US15933066

申请日：2018-03-22

Applicant: InvenSense, Inc.

Inventor： Etienne De Foras ,  Harihar Narasimha-Iyer ,  Daniela Hall ,  Jonathan Baudot ,  Bruno Flament

IPC: G06K9/00

Abstract: In a method for operating a fingerprint sensor including a plurality of ultrasonic transducers, receiving a plurality of images corresponding to different subsets of the ultrasonic transducers of the fingerprint sensor are received, wherein the plurality of images are non-adjacent. For each image of the plurality of images, it is determined whether the image of the plurality of images is indicative of a fingerprint. Provided a number of images of the plurality of images that are indicative of a fingerprint satisfies a threshold, it is determined whether the images of the plurality of images that are indicative of a fingerprint are collectively indicative of a fingerprint. Provided the plurality of images are collectively indicative of a fingerprint, it is determined that the plurality of images include a fingerprint.

公开(公告)号：US12002282B2

公开(公告)日：2024-06-04

申请号：US17001531

申请日：2020-08-24

Applicant: InvenSense, Inc.

Inventor： Etienne De Foras ,  Harihar Narasimha-Iyer ,  Daniela Hall ,  Jonathan Baudot ,  Bruno Flament

IPC: G06V40/13 ,  G06V40/12

CPC classification number: G06V40/1306 ,  G06V40/1359 ,  G06V40/1382

Abstract: In a method for operating a fingerprint sensor including a plurality of ultrasonic transducers, receiving a plurality of images corresponding to different subsets of the ultrasonic transducers of the fingerprint sensor are received, wherein the plurality of images are non-adjacent. For each image of the plurality of images, it is determined whether the image of the plurality of images is indicative of a fingerprint. Provided a number of images of the plurality of images that are indicative of a fingerprint satisfies a threshold, it is determined whether the images of the plurality of images that are indicative of a fingerprint are collectively indicative of a fingerprint. Provided the plurality of images are collectively indicative of a fingerprint, it is determined that the plurality of images include a fingerprint.

公开(公告)号：US11016186B2

公开(公告)日：2021-05-25

申请号：US16036767

申请日：2018-07-16

Applicant: InvenSense, Inc.

Inventor： Harihar Narasimha-Iyer ,  Hao-Yen Tang

IPC: G01S15/89 ,  G01S7/52 ,  H04R29/00 ,  G06K9/00 ,  A61B17/00

Abstract: In a method for detection of defective ultrasonic transducers in an in ultrasonic sensing device, an ultrasonic signal is generated at an ultrasonic sensing device comprising a plurality of ultrasonic transducers. A reflected ultrasonic signal corresponding to the ultrasonic signal is received at at least one ultrasonic transducer of the plurality of ultrasonic transducers. It is determined whether performance the at least one ultrasonic transducer is degraded based at least in part on the reflected ultrasonic signal.

公开(公告)号：US11232549B2

公开(公告)日：2022-01-25

申请号：US16550041

申请日：2019-08-23

Applicant: InvenSense, Inc.

Inventor： Harihar Narasimha-Iyer

IPC: G06T7/00 ,  G06K9/00 ,  G06K9/03

Abstract: In a method for adapting a quality threshold for a fingerprint image, a fingerprint image is received. An image quality of the fingerprint image is determined. Provided the image quality of the fingerprint image does not satisfy a quality threshold, the quality threshold is decreased. Provided the image quality of the fingerprint image does satisfy a decreased quality threshold, the fingerprint image is forwarded to a matcher for fingerprint authentication.

公开(公告)号：US10997388B2

公开(公告)日：2021-05-04

申请号：US16270480

申请日：2019-02-07

Applicant: InvenSense, Inc.

Inventor： Daniela Hall ,  Bruno Flament ,  Jonathan Baudot ,  Etienne DeForas ,  Harihar Narasimha-Iyer

IPC: G06K9/00 ,  G06T7/00 ,  G06K9/03

Abstract: In a method for evaluating a darkfield image for contamination, it is determined whether an object is interacting with a fingerprint sensor. Provided an object is not interacting with the fingerprint sensor, a darkfield candidate image is captured at a fingerprint sensor. The darkfield candidate image is evaluated for contamination. Based on the evaluating, it is determined whether the darkfield candidate image includes contamination.

公开(公告)号：US10984209B2

公开(公告)日：2021-04-20

申请号：US16270395

申请日：2019-02-07

Applicant: InvenSense, Inc.

Inventor： Sina Akhbari ,  Bruno Flament ,  Daniela Hall ,  Romain Fayolle ,  Etienne DeForas ,  Harihar Narasimha-Iyer

IPC: G06K9/00 ,  G01N21/88 ,  B06B1/06 ,  G06T5/50 ,  G06K9/22

Abstract: In a method for modeling a darkfield candidate image at a sensor, a plurality of darkfield images of the sensor is captured, wherein each darkfield image of the plurality of darkfield images is associated with a different operational condition of the sensor. An operational condition of the sensor is determined. A darkfield candidate image comprising a combination of the plurality of darkfield images is modeled based at least in part on the operational condition of the sensor, wherein a contribution of each darkfield image of the plurality of darkfield images is dependent on the operational condition.