公开(公告)号：US20180060639A1

公开(公告)日：2018-03-01

申请号：US15496156

申请日：2017-04-25

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Jaesoong LEE ,  Byoungho LEE ,  Youngmo JEONG

IPC: G06K9/00 ,  G06K9/62

CPC classification number: G06K9/0012 ,  G06F21/32 ,  G06K9/00013 ,  G06K9/00087 ,  G06K9/00114 ,  G06K9/6202 ,  G06K2009/0006

Abstract: Provided are apparatuses and methods using an optical speckle. An apparatus may include a light source configured to emit coherent light to an object and an imaging device configured to photograph a speckle pattern generated on the object by the coherent light. The apparatus may also include a processor having a function of determining whether the object is a living body or a non-living body by measuring a contrast of the speckle pattern. The processor may be configured to determine whether the object is a living body or not by comparing the contrast of the speckle pattern with a threshold contrast or a reference contrast previously registered by a user. The apparatus may be used by being applied to a fingerprint recognition system.

公开(公告)号：US20170017858A1

公开(公告)日：2017-01-19

申请号：US15184655

申请日：2016-06-16

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Younggeun ROH ,  Byoungho LEE ,  Jiwoon YEOM ,  Youngmo JEONG ,  Jinsoo JEONG

IPC: G06K9/46 ,  G06T7/20 ,  G06T7/00 ,  A61B5/00 ,  G02B27/48 ,  G02B13/00 ,  A61B5/026 ,  G06K9/00 ,  G06T5/00

CPC classification number: A61B5/7207 ,  A61B5/0261 ,  A61B5/6898 ,  G02B13/009 ,  G02B13/146 ,  G02B21/0008 ,  G02B27/48 ,  G06K9/0012 ,  G06K2009/00932

Abstract: Provided are a laser speckle contrast imaging method, a laser speckle contrast imaging system, and an apparatus which includes the laser speckle contrast imaging system. The laser speckle contrast imaging system includes a laser light source configured to irradiate laser beams toward a subject, the laser beams having a plurality of wavelength bands and different surface transmittances with respect to the subject. An imaging unit is configured to acquire speckle images by capturing images of speckles by using an image sensor, the speckles being formed when the irradiated laser beams are scattered from the subject. A signal processor is configured to convert the acquired speckle images into speckle contrast images and to acquire a compensated speckle contrast image by compensating for a change caused by a movement of the subject.

Abstract translation: 提供了激光散斑对比度成像方法，激光散斑对比度成像系统和包括激光散斑对比成像系统的装置。 激光散斑对比度成像系统包括被配置为朝向被摄体照射激光束的激光源，激光束相对于被摄体具有多个波长带和不同的表面透射率。 成像单元被配置为通过使用图像传感器捕获斑点的图像来获取斑点图像，当照射的激光束从被摄体散射时形成斑点。 信号处理器被配置为将所获取的斑点图像转换成散斑对比图像，并且通过补偿由对象的移动引起的变化来获取补偿的散斑对比图像。