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公开(公告)号：US10609292B2
公开(公告)日：2020-03-31
申请号：US15708183
申请日：2017-09-19
Inventor： Taro Imagawa , Akihiro Noda , Hiroya Kusaka
Abstract: An imaging apparatus includes an imaging unit, a detector, a calculator, and a controller. The imaging unit captures an image of a road on which a vehicle runs, and generates the captured image of the road. The detector detects a contact position at which the vehicle is in contact with the road in the captured image. The calculator calculates a first brightness range based on brightness distribution in a first road surface area on the road and the first road surface area includes the contact position. The controller determines an imaging condition for the imaging unit based on the first brightness range, and controls the imaging unit using the determined imaging condition.
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公开(公告)号：US12283069B2
公开(公告)日：2025-04-22
申请号：US17704290
申请日：2022-03-25
Inventor： Taro Imagawa , Akihiro Noda , Yuki Maruyama , Hiroya Kusaka
Abstract: A conversion parameter calculation method includes: obtaining, from a first image capturing device, first image data obtained by the first image capturing device capturing an image of an object; obtaining, from a second image capturing device, second distance data indicating a distance to the object, and second image data obtained by the second image capturing device capturing an image of the object; obtaining displacement direction information indicating a direction of a displacement of the object in three dimensions; associating positions on the object in the first image data and the second image data; estimating a position of the first image capturing device; calculating first distance data indicating a distance from the first image capturing device to the object; and calculating a conversion parameter for converting a pixel displacement amount of the object into the actual displacement amount, using the first distance data and the displacement direction information.
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公开(公告)号：US11920913B2
公开(公告)日：2024-03-05
申请号：US17699418
申请日：2022-03-21
Inventor： Akihiro Noda , Taro Imagawa , Yuki Maruyama , Hiroya Kusaka
CPC classification number: G01B11/022 , G01B11/026 , G01B11/03 , G01B11/2518 , G06K7/1417
Abstract: A conversion parameter calculation method includes: obtaining, from an image capturing device, image data obtained by the image capturing device capturing an image of an object having attached thereto a marker with which specific coordinates are detectable; obtaining displacement direction information indicating a direction of a displacement of the object, the direction crossing an image capturing surface of the image capturing device; detecting specific coordinates, based on the marker included in the image data; estimating a position of the image capturing device, based on a result of the detection; calculating distance data indicating a distance from the image capturing device to the object, based on the position of the image capturing device; and calculating, using the distance data and the displacement direction information, a conversion parameter for converting a pixel displacement amount of the object into an actual displacement amount.
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公开(公告)号：US11199469B2
公开(公告)日：2021-12-14
申请号：US16357928
申请日：2019-03-19
Inventor： Hiroya Kusaka , Taro Imagawa , Akihiro Noda
Abstract: A monitoring system includes an axle weight measurer and a state estimator. The axle weight measurer detects a surface displacement of a road from a first captured image obtained by imaging the road when a vehicle passes at a predetermined spot of a structure having the road that the vehicle passes, and calculates an axle weight of the vehicle from the surface displacement and a displacement coefficient of the road. The state estimator generates an axle weight distribution from the axle weight calculated by the axle weight measurer, and estimates a deterioration degree of the structure, using the axle weight distribution.
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公开(公告)号：US10379035B2
公开(公告)日：2019-08-13
申请号：US15901506
申请日：2018-02-21
Inventor： Akihiro Noda , Hiroya Kusaka , Taro Imagawa , Shunsuke Yasugi
IPC: H04N7/18 , G01N21/27 , G06T7/90 , G01N21/84 , G06T7/00 , H04N5/235 , G01N21/25 , G01N21/47 , H04N5/225 , H04N5/232 , H04N9/04 , H04N9/64 , G06T7/13 , G01N33/02
Abstract: An appearance inspection apparatus includes a lighting unit, an imaging unit, a memory, an operating unit, a detecting unit, and a determination unit. The lighting unit has a plurality of light sources emitting single-wavelength light with relative spectral distributions different from one another, and substantially simultaneously irradiates a photographic subject with illumination light. The imaging unit captures light discharged by the photographic subject. The memory stores information about sensitivity characteristics of the imaging unit for each color. The operating unit separates an image into a first, a second, and a third image, for each component of the single-wavelength light, using the information. The detecting detects information about a specific area of the photographic subject using the first and the second image. The determination unit extracts an amount of image characteristics corresponding to a characteristic part present in the specific area using the first and the third image.
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Patent Agency Ranking
公开(公告)号：US12209934B2
公开(公告)日：2025-01-28
申请号：US17568129
申请日：2022-01-04
Inventor： Taro Imagawa , Akihiro Noda , Yuki Maruyama , Hiroya Kusaka
Abstract: An imaging parameter output method is a method of outputting an imaging parameter of an imaging device that captures an image for measuring a displacement representing a movement of an object. The imaging parameter output method includes: obtaining object information identifying the object, and a geometric imaging condition for imaging the object; calculating the imaging parameter including a candidate imaging area for placing the imaging device and the accuracy in measuring the displacement in the candidate imaging area, based on the object information and the geometric imaging condition, without imaging the object using the imaging device; and outputting the imaging parameter.
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公开(公告)号：US11976960B2
公开(公告)日：2024-05-07
申请号：US17015675
申请日：2020-09-09
Inventor： Taro Imagawa , Akihiro Noda , Hiroya Kusaka
CPC classification number: G01G19/022 , B60W40/06 , B60W40/13 , G01B11/24 , G01G9/00 , G06T7/70 , B60W2420/403 , B60W2530/00 , G06T2207/30252
Abstract: An axle load measuring apparatus includes a displacement calculator, a storage, and an axle load calculator. The displacement calculator detects displacements of positions on a road caused by an axle load using a captured image of the road and a vehicle thereon. When a certain amount of load is applied to a predetermined position of the road, the storage stores a displacement function representing shape information of a spatial distribution of a displacement of the road originated from the predetermined position. The axle load calculator calculates the axle load based on the displacements of the positions and the displacement function.
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公开(公告)号：US11796481B2
公开(公告)日：2023-10-24
申请号：US16996393
申请日：2020-08-18
Inventor： Taro Imagawa , Hiroya Kusaka , Akihiro Noda
CPC classification number: G01N21/8806 , G01B11/30 , G01N21/8851
Abstract: An inspection device that inspects a structure with a crack, including: an obtainer that obtains images of the structure captured at mutually different times while the structure is subjected to varying loads; a crack detector that detects a crack on a surface of the structure in each image; a motion estimator that divides each image into blocks having a predetermined size, and derives motion vectors of the blocks based on a positional relation between a position of each block relative to a reference in a first image and a position of each block relative to the reference in a second image, the reference being a tip of the crack detected, the first and second images being included in the images; and an inspector that determines safety of the structure based on a difference between ones of the motion vectors of symmetric positions with respect to the crack.
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公开(公告)号：US11461875B2
公开(公告)日：2022-10-04
申请号：US17132163
申请日：2020-12-23
Inventor： Akihiro Noda , Taro Imagawa , Yuki Maruyama , Hiroya Kusaka
Abstract: A displacement measurement device includes: an obtainer that obtains a first image which contains a subject and a second image which contains the subject; a generator that generates M template images which contain the subject and which have noise from the first image and generates M target images which contain the subject and which have noise from the second image, M being an integer of 2 or higher; a hypothetical displacement calculator that calculates M hypothetical displacements of the subject from the M template images and the M target images; and a displacement calculator that calculates a displacement of the subject by performing statistical processing on the M hypothetical displacements.
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公开(公告)号：US10982951B2
公开(公告)日：2021-04-20
申请号：US16384987
申请日：2019-04-16
Inventor： Akihiro Noda , Hiroya Kusaka , Taro Imagawa
Abstract: An axle-load measuring apparatus measures an axle load of a vehicle by using a captured image where a road and the vehicle on the road are imaged, and the axle-load measuring apparatus includes a displacement calculator, a correction information obtaining unit, and an axle-load calculator. The displacement calculator detects a displacement of the road by using the captured image. The displacement is caused by receiving the axle load. The correction information obtaining unit obtains correction information. An axle-load calculator calculates the axle load by using the displacement and the correction information.
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