公开(公告)号：US20220121869A1

公开(公告)日：2022-04-21

申请号：US17497802

申请日：2021-10-08

Applicant: Hitachi, Ltd.

Inventor： Naoto MIURA ,  Yusuke MATSUDA ,  Akio NAGASAKA ,  Yo NONOMURA ,  Keiichiro NAKAZAKI

IPC: G06K9/00 ,  G06K9/62 ,  G06K9/20 ,  G06T7/194 ,  G06K9/46

Abstract: The objective is to achieve highly accurate authentication even when there is variation in the ambient light environment during biometric imaging. A biometric authentication device includes an image capturing unit that captures images of a living body, a light source for capturing images of the living body, an optical filter that selectively passes and blocks light according to wavelength, a spectroscopic processing unit that separates multiple wavelengths captured simultaneously, respectively, and a calculation unit that calculates the shape and posture of a predetermined part of the living body in the captured images, a background removal unit that removes the background from the image of the living body using the spectral images of the living body and the spectral image of the unwanted ambient light, and an authentication unit that performs biometric authentication using the image of the predetermined part.

公开(公告)号：US20140286541A1

公开(公告)日：2014-09-25

申请号：US14177250

申请日：2014-02-11

Applicant: HITACHI, LTD.

Inventor： Harumi KIYOMIZU ,  Naoto MIURA ,  Akio NAGASAKA ,  Takafumi MIYATAKE ,  Yusuke MATSUDA

IPC: G06K9/00

CPC classification number: G06K9/00033 ,  G06K9/2027 ,  G06K2009/0006 ,  G06K2009/00932

Abstract: A blood vessel image taking device including a finger presentation area configured at a surface of a cabinet, plural light sources arranged at the finger presentation area for irradiating a presented finger with a light ray, a light quantity controlling unit for controlling light quantities of the plural light sources, an opening portion configured at the finger presentation area, and an image taking unit for taking an image of the light ray from the light source portion passing through the opening portion and irradiated to the finger, in which portions of the finger presentation area are a tip end presentation area for presenting a tip end side of the finger, and a root presentation area for presenting a root side of the finger.

Abstract translation: 一种血管图像摄取装置，包括配置在机壳的表面的手指呈现区域，布置在手指呈现区域处的多个光源，用于用光线照射呈现的手指;光量控制单元，用于控制多个 光源，配置在手指呈现区域处的开口部分，以及摄像单元，用于从通过开口部分的光源部分拍摄来自照射到手指的光线的图像，其中手指呈现区域的部分 是用于呈现手指的末端侧的末端呈现区域和用于呈现手指根部侧面的根部呈现区域。