公开(公告)号：US20220139105A1

公开(公告)日：2022-05-05

申请号：US17431784

申请日：2019-02-22

Applicant: NEC Corporation

Inventor： Yoshimasa ONO ,  Shigeru NAKAMURA ,  Atsufumi SHIBAYAMA ,  Junichi ABA

IPC: G06V40/12 ,  G06V40/13 ,  G06T7/50 ,  G06T7/73 ,  G06T7/13

Abstract: A technique for accurately extracting a fingerprint image for accurate authentication from 3D tomographic luminance data of a finger at a high speed. A processing apparatus (11) according to the present disclosure includes means for, after performing edge detection processing on a tomographic image (101, 102, . . . 10 k, . . . , 10n) at each depth, calculating the total number of edge pixels in the tomographic image from 3D (three-dimensional) tomographic luminance data, and acquiring depth dependence of the number of edges (111, 112), and means for extracting a tomographic image having a striped pattern from the depth dependence of the number of edges and the 3D tomographic luminance data.