公开(公告)号：US11244143B2

公开(公告)日：2022-02-08

申请号：US16671629

申请日：2019-11-01

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Huijin Lee ,  Jingu Heo

IPC: G06K9/00 ,  G06K9/48 ,  G06K9/62

Abstract: Provided in a fingerprint image preprocessing method including receiving an input fingerprint image, performing a short-time Fourier transform (STFT) on the input fingerprint image to obtain a transformed fingerprint image, comparing the input fingerprint image and the transformed fingerprint image, and generating a combined image by combining the input fingerprint image and the transformed fingerprint image based on a result of the comparing.

公开(公告)号：US11176350B2

公开(公告)日：2021-11-16

申请号：US16830667

申请日：2020-03-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Huijin Lee

IPC: G06K9/00

Abstract: A method of processing a fingerprint image in an electronic apparatus includes: obtaining an original fingerprint image by sensing a fingerprint of a user; estimating a spatial change trend of original contrast values in the original fingerprint image; generating a reference contrast map based on the estimated spatial change trend; normalizing a contrast distribution of the original fingerprint image based on the reference contrast map, and generating a normalization fingerprint image having a normalized contrast distribution.

公开(公告)号：US11106883B2

公开(公告)日：2021-08-31

申请号：US16445417

申请日：2019-06-19

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Huijin Lee ,  Dongkyun Kim ,  Jingu Heo

IPC: G06K9/00 ,  G06K9/20

Abstract: Provided is a method of processing data corresponding to a fingerprint image including obtaining first image data corresponding to a group including a plurality of pixels, and dividing the first image data into second image data corresponding to each of the plurality of pixels based on a plurality of weights corresponding to the plurality of pixels, respectively.

公开(公告)号：US10726309B2

公开(公告)日：2020-07-28

申请号：US15886100

申请日：2018-02-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： Huijin Lee ,  Minsu Ahn ,  Sunghoon Hong

IPC: G06K9/00 ,  H04N5/225 ,  G06K9/62 ,  G06K9/46 ,  G06T7/246 ,  G06K9/20 ,  G06K9/78

Abstract: Disclosed is a subject recognizing apparatus and method. The method may include extracting feature points from a target image, respectively measuring movement information of each of a plurality of the extracted feature points, selectively grouping the extracted feature points into one or more groups based on the respectively measured movement information, determining a type of subject present in at least one group of the one or more groups based on at least a portion of the subject present in the at least one group, and recognizing a subject included in the target image based on the determined type of subject.