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：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：US11151355B2

公开(公告)日：2021-10-19

申请号：US16236107

申请日：2018-12-28

Applicant: InvenSense, Inc.

Inventor： Jonathan Baudot ,  Etienne De Foras

IPC: G06K9/00 ,  H04N5/232

Abstract: In a method for generating an estimated fingerprint image, a ridge/valley pattern of a fingerprint of a finger is received. A sensor image including a partial fingerprint of the finger is received. Ridge/valley characteristics of the fingerprint are extracted from the sensor image including the partial fingerprint. An estimated fingerprint image is generated based at least on the ridge/valley pattern of the fingerprint and the ridge/valley characteristics of the fingerprint.