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公开(公告)号：US20230087275A1
公开(公告)日：2023-03-23
申请号：US17801441
申请日：2020-02-27
Applicant: NEC Corporation
Inventor： Keiichi CHONO , Ryuichi AKASHI , Yuka OGINO
IPC: G06V10/141 , G06V40/18 , G06V40/19
Abstract: An imaging system (10) includes: iris imaging means (1) for photographing an iris of a subject; first irradiation means (2a) for applying light to the subject; and second irradiation means (2b) for applying light to the subject in such a manner that an angle between an optical axis of the light emitted from the second irradiation means (2b) and an optical axis of the iris imaging means (1) is larger than an angle between an optical axis of the light emitted from the first irradiation means (2a) and the optical axis of the iris imaging means (1).
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公开(公告)号：US20220254193A1
公开(公告)日：2022-08-11
申请号：US17680698
申请日：2022-02-25
Applicant: NEC Corporation
Inventor： Takashi SHIBATA , Shoji YACHIDA , Chisato FUNAYAMA , Masato TSUKADA , Yuka OGINO , Keiichi CHONO , Emi KITAGAWA , Yasuhiko YOSHIDA , Yusuke MORI
Abstract: The disclosure is inputting a first image obtained by capturing an object of authentication moving in a specific direction; inputting a second image at least for one eye obtained by capturing a right eye or a left eye of the object; determining whether the second image is of the left eye or the right eye of the object, based on information including the first image, and outputting a determination result associated with the second image as left/right information; comparing characteristic information relevant to the left/right information, the characteristic information being acquired from a memory that stores the characteristic information of a right eye and a left eye pertaining to object to be authenticated, with characteristic information associated with the left/right information, and calculating a verification score; and authenticating the object captured in the first image and the second image, based on the verification score, and outputting an authentication result.
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公开(公告)号：US20220189207A1
公开(公告)日：2022-06-16
申请号：US17684808
申请日：2022-03-02
Applicant: NEC Corporation
Inventor： Takashi SHIBATA , Shoji YACHIDA , Chisato FUNAYAMA , Masato TSUKADA , Yuka OGINO , Keiichi CHONO , Emi KITAGAWA , Yasuhiko YOSHIDA , Yusuke MORI
Abstract: The disclosure is inputting a first image captured an image of an authentication target; inputting a second image captured an image of a right eye or a left eye of the target; determining whether the second image is of a left eye or a right eye of the target based on information including the first image, and outputting a determination result as left/right information in association with the second image; detecting an overlap between a region including the second image and a predetermined region in the first image; calculating a verification score by comparing characteristic information that are related to the left/right information with iris characteristic information calculated from the second image, and calculating a first weighted verification score obtained by weighting the verification score with a detection result; and authenticating a target in the second image based on the first weighted verification score, and outputting an authentication result.
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公开(公告)号：US20220166921A1
公开(公告)日：2022-05-26
申请号：US17437958
申请日：2020-02-06
Applicant: NEC Corporation
Inventor： Yuka OGINO , Keiichi CHONO
Abstract: The image processing apparatus 10 includes image storage means 11 for sequentially storing images continuously captured in time, thinning means 12 for performing a thinning process for the images continuously captured in time, first image evaluation means 13 for performing first focus evaluation on the images after the thinning process is performed, selection means 14 for selecting a plurality of in-focus frame candidates from the images continuously captured in time, based on an evaluation result of the first focus evaluation, second image evaluation means 15 for reading the images of the in-focus frame candidates selected by the selection means 14 from the image storage means 11 and performing second focus evaluation on the read images, and matching image determination means 16 for selecting a matching image for an authentication process from the images of the in-focus frame candidates, based on an evaluation result of the second focus evaluation.
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公开(公告)号：US20220141372A1
公开(公告)日：2022-05-05
申请号：US17431545
申请日：2020-02-12
Applicant: NEC Corporation
Inventor： Keiichi CHONO , Ryuichi AKASHI , Yuka OGINO , Masato TSUKADA
IPC: H04N5/235 , G06V10/141 , H04N5/225 , G06V40/19
Abstract: An illumination device emits light toward a moving subject. A controller controls light emitted from the illumination device so that the amount of light applied to the subject is adjusted to a specific amount or smaller. For example, when the illumination device emits light in a pulsed manner, the controller may control the amount of light applied to the subject by controlling at least one of the pulse width and the pulse intensity of the light. The controller may, for example, control the light emitted from the illumination device according to the distance between the illumination device and the subject.
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Patent Agency Ranking
公开(公告)号：US20220005203A1
公开(公告)日：2022-01-06
申请号：US17294071
申请日：2018-11-19
Applicant: NEC Corporation
Inventor： Ryuichi AKASHI , Keiichi CHONO , Masato TSUKADA , Chisato FUNAYAMA , Takahiro TOIZUMI , Yuka OGINO
Abstract: In order to detect the foreground without being affected by reflected light from the shadow of an object or the background and so on, in both indoor and outdoor environments, the image processing method includes a step of generating first foreground likelihood from a visible light image, a step of generating second foreground likelihood from a depth image in which the same object is captured as that in the visible light image, a step of generating reliability of the depth image using at least the visible light image and the depth image, and a step of determining foreground likelihood of the object based on the first foreground likelihood and the second foreground likelihood, using the reliability of the depth image as a weight.
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公开(公告)号：US20250017494A1
公开(公告)日：2025-01-16
申请号：US18896992
申请日：2024-09-26
Applicant: NEC Corporation
Inventor： Takashi SHIBATA , Shoji YACHIDA , Chisato FUNAYAMA , Masato TSUKADA , Yuka OGINO , Keiichi CHONO , Emi KITAGAWA , Yasuhiko YOSHIDA , Yusuke MORI
IPC: A61B5/1171 , G06F21/32 , G06V10/26
Abstract: An authentication device includes an image acquisition unit, an identification unit, and an authentication unit. The image acquisition unit acquires an image of an eye of a subject. The identification unit identifies the colored pattern of a colored contact lens worn by the subject by comparing a reference image with the image of the eye. The authentication unit identifies the subject, using a feature in a region other than a colored region of the colored pattern in the iris region of the eye.
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38.发明申请公开(公告)号：US20240420505A1
公开(公告)日：2024-12-19
申请号：US18705213
申请日：2021-10-29
Applicant: NEC CORPORATION , THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
Inventor： Takahiro TOIZUMI , Masato TSUKADA , Yuka OGINO , Masatsugu ICHINO , Tsubasa BOURA
IPC: G06V40/18 , G06T3/4053 , G06V10/52 , G06V10/77 , G06V10/82
Abstract: Included are: an iris image acquisition unit that acquires an iris image including an iris of a living body; a calculation unit that calculates a scale factor for the iris image, from a size of an iris area included in the iris image and from a desired size; a generation unit that generates a resolution-converted image in which resolution of the iris image is converted in accordance with the scale factor; and a post-transform feature vector extraction unit that extracts a post-transform feature vector that is a feature vector of the resolution-converted image.
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39.发明公开公开(公告)号：US20240153310A1
公开(公告)日：2024-05-09
申请号：US17776314
申请日：2021-09-14
Applicant: NEC Corporation
Inventor： Ryo YAMAKABE , Ryuichi AKASHl , Yuka OGINO , Kosuke YOSHIMI , Masato TSUKADA
CPC classification number: G06V40/193 , G06V10/25 , G06V10/761 , H04N23/67
Abstract: An information processing system (10) comprises: a distance acquisition unit (110) that specifies an iris area containing an iris of a target from a visible-light image of the target, and acquires an iris distance that is a distance to the iris area; an iris image acquisition unit (120) that acquires an iris image of the target by changing a focal length according to the iris distance; a score computing unit (130) that calculates a score relating to deviation of a focus in the iris image, based on the iris image; and a correlation update unit (140) that updates correlation between the iris distance and the focal length at a moment of acquisition of the iris image, based on the score. According to such an information processing system, since the correlation is updated with good accuracy, it is possible to acquire the appropriate iris image.
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40.发明公开公开(公告)号：US20240104179A1
公开(公告)日：2024-03-28
申请号：US17768565
申请日：2021-12-06
Applicant: NEC CORPORATION
Inventor： Yuka OGINO
CPC classification number: G06F21/32 , G06V40/103 , G06V40/18
Abstract: A biometric authentication system (10) comprises a first imaging unit (11) that images a first image including a living body; a detecting unit (115) that detects a position of the living body in the first image; a second imaging unit (120) that images a second image including an authentication portion of the living body, based on the position of the living body in the first image; a calculating unit (140) that calculates an error between the first imaging unit and the second imaging unit based on the position of the living body in the first image and a position of the authentication portion in the second image; and an adjusting unit (150) that adjusts a set value relating to the second imaging unit, based on the error.
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