公开(公告)号：US20240161279A1

公开(公告)日：2024-05-16

申请号：US18281266

申请日：2021-12-27

Applicant: NEC Corporation

Inventor： Shigeru NAKAMURA

IPC: G06T7/00 ,  G06T7/50 ,  G06T11/00 ,  G06V10/44 ,  G06V10/60

CPC classification number: G06T7/0012 ,  G06T7/50 ,  G06T11/00 ,  G06V10/44 ,  G06V10/60 ,  G06T2207/10072 ,  G06T2207/30088

Abstract: There is provided an information processing apparatus including a first acquisition means for acquiring a first feature amount acquired from luminance data of a first plane facing a surface of a skin among three-dimensional luminance data of the skin, a second acquisition means for acquiring a second feature amount acquired from luminance data of a second plane including a depth direction of the skin among the three-dimensional luminance data, and a calculation means for calculating an extraction depth for extraction of a pattern of the skin based on the first feature amount and the second feature amount.

公开(公告)号：US20240035803A1

公开(公告)日：2024-02-01

申请号：US17876453

申请日：2022-07-28

Applicant: NEC CORPORATION

Inventor： John Kenji David CLARK ,  Shigeru NAKAMURA

IPC: G01B9/02091 ,  G01B9/02001

CPC classification number: G01B9/02091 ,  G01B9/02007

Abstract: A swept-source optical coherence tomography (SS-OCT) apparatus includes a plurality of wavelength-tunable light sources. The SS-OCT apparatus includes a first optical coupler configured to receive an output from each of the plurality of wavelength-tunable light sources. The optical coupler is configured to split the received output from the plurality of wavelength-tunable light sources into a reference optical path and a sample optical path. The sample optical path is configured to illuminate a sample. The SS-OCT apparatus includes a second optical coupler configured to receive return optical signals from the reference optical path and the sample optical path, and to output an optical interference signal. The SS-OCT apparatus includes a detector configured to detect the optical interference signal; and a controller configured to receive an electrical signal based on the detected optical interference signal. The controller is configured to generate a depth profile of the sample using compressed sensing.

公开(公告)号：US20220277498A1

公开(公告)日：2022-09-01

申请号：US17630228

申请日：2019-08-01

Applicant: NEC Corporation

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

IPC: G06T11/00 ,  G06T15/04 ,  G06T15/08 ,  G06V40/12 ,  G06V40/13

Abstract: Provided is a processing apparatus capable of obtaining a 2D image from 3D tomographic images, extracting an image for accurate authentication, and extracting an image at a high speed. A processing apparatus includes:
means for calculating, from three-dimensional luminance data indicating an authentication target, depth dependence of striped pattern sharpness in a plurality of regions on a plane perpendicular to a depth direction of the target; means for calculating a depth at which the striped pattern sharpness is the greatest in the depth dependence of striped pattern sharpness; rough adjustment means for correcting the calculated depth on the basis of depths of other regions positioned respectively around the plurality of regions; fine adjustment means for selecting a depth closest to the corrected depth and at which the striped pattern sharpness is at an extreme; and means for extracting an image with a luminance on the basis of the selected depth.

公开(公告)号：US20220214156A1

公开(公告)日：2022-07-07

申请号：US17609859

申请日：2019-05-16

Applicant: NEC Corporation

Inventor： Atsufumi SHIBAYAMA ,  Shigeru NAKAMURA

IPC: G01B9/02091

Abstract: An optical coherence tomography apparatus (100) includes a wavelength sweeping laser light source (101), a branching and merging device (103) that branches a light beam emitted from the wavelength sweeping laser light source (101) into an object light beam and a reference light beam, an optical spectrum data generation unit (108) that generates information about wavelength dependence of an intensity difference between a plurality of interference light beams generated by interference between an object light beam scattered from a measurement object (200) and a reference light beam, and a control unit (109) that acquires structural data of the measurement object (200) in a depth direction on the basis of the information about wavelength dependence, and connects a plurality of pieces of structural data in the depth direction acquired at different positions in a scanning direction of the measurement object (200), wherein preliminary measurement is performed by causing the wavelength sweeping laser light source (101) to emit a light beam swept in a wavelength sweep range narrower than a wavelength sweep range in actual measurement, and the actual measurement is performed when it is determined that the measurement object (200) is at a position suitable for performing the actual measurement on the basis of results of the preliminary measurement.

公开(公告)号：US20210018312A1

公开(公告)日：2021-01-21

申请号：US17043077

申请日：2019-03-28

Applicant: NEC Corporation

Inventor： Shigeru NAKAMURA

IPC: G01B9/02 ,  G02F1/225

Abstract: An optical coherence tomographic imager for contributing reduction of the number of man-hours for evaluation to obtain a wavelength sweeping operation of continuous, linear, and monotonic change while utilizing a wavelength-tunable laser having a structure that is less susceptible to mechanical disturbance. The optical coherence tomographic imager includes a wavelength-tunable light source, a branching means, an irradiation means, a photoelectric conversion measuring means, and a processor. The wavelength-tunable light source outputs light whose wavelength is determined by a plurality of light source drive parameters. The branching means branches output light of the wavelength-tunable light source into object light and reference light. The irradiation means irradiates an object to be measured with the object light. The photoelectric conversion measuring means obtains interference light intensity measurement values by causing object light scattered from the object to be measured and the reference light to interfere with each other and to be guided to a light receiver. The processor reorders the interference light intensity measurement values based on the output light wavelengths.

公开(公告)号：US20200309692A1

公开(公告)日：2020-10-01

申请号：US16772684

申请日：2018-12-18

Applicant: NEC Corporation

Inventor： Shigeru NAKAMURA

IPC: G01N21/47 ,  G02B27/10

Abstract: An optical beam controller includes: an optical multiple-beam generator generating a plurality of wavelength-swept optical beams; and an optical frequency difference setter setting an optical frequency difference in any combination of the plurality of optical beams in such a way as to be larger than a band of a photodetector that receives an optical beam.

公开(公告)号：US20150219844A1

公开(公告)日：2015-08-06

申请号：US14611411

申请日：2015-02-02

Applicant: NEC Corporation

Inventor： Kenji MIZUTANI ,  Shigeru NAKAMURA

IPC: G02B6/036

CPC classification number: G02B6/136 ,  G02B6/1228 ,  G02B2006/12097

Abstract: An optical waveguide of the present invention is an optical waveguide having a first rib and a second rib being provided on a slab layer along one direction from one side to the other side and a barrier layer being connected between said first rib and said second rib, in which: the first rib includes a first taper part having a width widening from a first end in said one side to a second end connected with said barrier layer; and the second rib includes a first layer and a second layer laminated on a face of said slab layer in turn.

Abstract translation: 本发明的光波导是具有第一肋和第二肋的光波导，第一肋和第二肋沿着从一侧到另一侧的一个方向设置在板状层上，阻挡层连接在所述第一肋和所述第二肋之间， 其中：第一肋包括第一锥形部，其具有从所述一侧的第一端到与所述阻挡层连接的第二端的宽度加宽; 并且第二肋包括依次层叠在所述板层的表面上的第一层和第二层。