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公开(公告)号：US11615552B2
公开(公告)日：2023-03-28
申请号：US17113425
申请日：2020-12-07
Inventor： Nobuhiko Wakai , Takeo Azuma , Kunio Nobori , Satoshi Sato , Ayako Maruyama
Abstract: A crossing point detector includes memory and a crossing point detection unit that reads out a square image from a captured image in the memory, and detects a crossing point of two boundary lines in a checker pattern depicted in the square image. The crossing point detection unit decides multiple parameters of a function model treating two-dimensional image coordinates as variables, the parameters optimizing an evaluation value based on a difference between corresponding pixel values represented by the function model and the square image, respectively, and computes the position of a crossing point of two straight lines expressed by the decided multiple parameters to thereby detect the crossing point with subpixel precision. The function model uses a curved surface that is at least first-order differentiable to express pixel values at respective positions in a two-dimensional coordinate system at the boundary between black and white regions.
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公开(公告)号：US10531104B2
公开(公告)日：2020-01-07
申请号：US16288613
申请日：2019-02-28
Inventor： Satoshi Sato , Kunio Nobori , Takeo Azuma , Ayako Maruyama , Nobuhiko Wakai
IPC: H04N19/186 , G06T3/40 , H04N9/04 , H04N1/41 , H04N1/64
Abstract: An imaging apparatus includes an imaging optical system that forms an optical signal, an imaging device that includes a plurality of pixels and that converts the optical signal formed on the plurality of pixels into an electrical signal, a color filter that is arranged between the imaging optical system and the imaging device and that has a different optical transmittance for each of the plurality of pixels and each of a plurality of wavelength ranges, and a transmission data compression circuit that compresses the electrical signal obtained by the imaging device. The sum of products of an optical transmittance group relating to a plurality of optical transmittances of the color filter for each of the plurality of pixels in the plurality of wavelength ranges and coefficients common to the plurality of pixels is the same between the plurality of pixels.
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公开(公告)号：US11138887B2
公开(公告)日：2021-10-05
申请号：US16795740
申请日：2020-02-20
Inventor： Ayako Maruyama , Kunio Nobori , Takeo Azuma , Satoshi Sato , Nobuhiko Wakai
Abstract: An image generating apparatus generates an image to be displayed on a display and includes at least one memory and a control circuit. The control circuit acquires a plurality of camera images captured by a plurality of cameras installed in a vehicle, calculates a distance between one of the cameras and a target to be projected in in the camera images, detects a position of a light-transmissive object or a reflective object in the camera images, and generates an image from a point of view that is different from points of view of the plurality of camera images by using the plurality of camera images and the distance, the generated image including a predetermined image that is displayed at the position of the light-transmissive object or the reflective object.
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公开(公告)号：US10885668B2
公开(公告)日：2021-01-05
申请号：US16458489
申请日：2019-07-01
Inventor： Nobuhiko Wakai , Takeo Azuma , Kunio Nobori , Satoshi Sato , Ayako Maruyama
Abstract: A crossing point detector includes memory and a crossing point detection unit that reads out a square image from a captured image in the memory, and detects a crossing point of two boundary lines in a checker pattern depicted in the square image. The crossing point detection unit decides multiple parameters of a function model treating two-dimensional image coordinates as variables, the parameters optimizing an evaluation value based on a difference between corresponding pixel values represented by the function model and the square image, respectively, and computes the position of a crossing point of two straight lines expressed by the decided multiple parameters to thereby detect the crossing point with subpixel precision. The function model uses a curved surface that is at least first-order differentiable to express pixel values at respective positions in a two-dimensional coordinate system at the boundary between black and white regions.
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公开(公告)号：US10388030B2
公开(公告)日：2019-08-20
申请号：US15803784
申请日：2017-11-05
Inventor： Nobuhiko Wakai , Takeo Azuma , Kunio Nobori , Satoshi Sato , Ayako Maruyama
Abstract: A crossing point detector includes memory and a crossing point detection unit that reads out a square image from a captured image in the memory, and detects a crossing point of two boundary lines in a checker pattern depicted in the square image. The crossing point detection unit decides multiple parameters of a function model treating two-dimensional image coordinates as variables, the parameters optimizing an evaluation value based on a difference between corresponding pixel values represented by the function model and the square image, respectively, and computes the position of a crossing point of two straight lines expressed by the decided multiple parameters to thereby detect the crossing point with subpixel precision. The function model uses a curved surface that is at least first-order differentiable to express pixel values at respective positions in a two-dimensional coordinate system at the boundary between black and white regions.
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公开(公告)号：US09998797B2
公开(公告)日：2018-06-12
申请号：US15485351
申请日：2017-04-12
Inventor： Ayako Maruyama , Kunio Nobori , Koichi Hotta , Mikiya Nakata , Hidetsugu Maekawa
IPC: H04N21/472 , H04N21/488 , G06K9/00 , H04N13/00 , H04N21/435 , H04N21/4788 , H04N21/2743 , H04N21/44 , H04N21/81 , H04N21/845 , G06T11/60 , G06F17/30 , G11B27/031
CPC classification number: H04N21/4882 , G06F17/3082 , G06K9/00671 , G06T11/60 , G11B27/031 , H04N13/183 , H04N21/2743 , H04N21/435 , H04N21/44008 , H04N21/472 , H04N21/47205 , H04N21/4788 , H04N21/488 , H04N21/8133 , H04N21/8456
Abstract: A comment-provided video generating apparatus includes: a display priority calculating unit which calculates a display priority for each of the comments and subject regions to which the comments are provided, based on comment information indicating comments to be superimposed and displayed on a video and display positions of the comments, and user information, by calculating a higher display priority for one of the comments and the subject regions specified by user information; a comment superimposing method determining unit which determines, as a method for superimposing the comments onto a video, an order of displaying the comments and the subject regions such that a comment or a subject region having a higher display priority is displayed at a position frontward than the others, according to the display priority; and an image composing unit which superimposes the comments on the video, according to the comment superimposing method.
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公开(公告)号：US09916690B2
公开(公告)日：2018-03-13
申请号：US14679316
申请日：2015-04-06
Inventor： Kunio Nobori , Ayako Maruyama , Yumiko Kato , Tsuyoshi Inoue
CPC classification number: G06T19/006 , G02B27/0093 , G02B27/017 , G02B2027/011 , G02B2027/0138 , G02B2027/014 , G02B2027/0187 , G02C11/10 , G06T5/006 , G06T2207/10012 , G06T2207/30041 , G06T2207/30201
Abstract: This invention solves the problem that objects in the field of view of reading glasses using multifocal lenses for correcting ocular refractive errors such as presbyopia appear distorted. This image display device is provided with the following: a distance computation unit that computes the distance to a subject in a field-of-view image; a visual-acuity-information acquisition unit that stores visual-acuity information for the user in advance; a corrected-image generation unit that generates and outputs a corrected image on the basis of the field-of-view image and an eye image generated from the field-of-view image, the distance information, and the visual-acuity information; and a display unit that displays the corrected image by superimposing same onto the user's field of view. Since the corrected image is superimposed without the use of lenses, lenses being the cause of the abovementioned distortion, the user can see close objects clearly.
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公开(公告)号：US10769814B2
公开(公告)日：2020-09-08
申请号：US16242291
申请日：2019-01-08
Inventor： Nobuhiko Wakai , Kunio Nobori , Takeo Azuma , Satoshi Sato , Ayako Maruyama , Mikiya Nakata
IPC: G06T7/80 , G01B21/04 , G01B11/24 , H04N13/246 , H04N13/239 , H04N5/232
Abstract: Provided are: a point group obtainer that obtains three-dimensional point group data indicating three-dimensional locations of each of a plurality of three-dimensional points included in an imaging space of one or more cameras; a camera parameter calculator that (i) obtains corresponding points, for each of the plurality of three-dimensional points, in individual images captured using the one or more cameras, based on the three-dimensional point group data and an initial camera parameter of each camera, and (ii) calculates a camera parameter of each camera on the basis of the initial camera parameter of each camera and pixel values, included in the individual images, at the corresponding points; and a camera parameter outputter that outputs the calculated camera parameter of each camera.
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公开(公告)号：US10602125B2
公开(公告)日：2020-03-24
申请号：US15693915
申请日：2017-09-01
Inventor： Kunio Nobori , Nobuhiko Wakai , Takeo Azuma , Satoshi Sato , Ayako Maruyama , Mikiya Nakata
IPC: H04N13/246 , H04N13/243 , H04N13/00
Abstract: A camera-parameter-set calculation apparatus includes a three-dimensional point group calculator that calculates a plurality of three-dimensional coordinates, based on first and second images respectively captured by first and second cameras and first and second camera parameter sets of the first and second cameras; an evaluation value calculator that determines a plurality of pixel coordinates in the second image, based on the plurality of three-dimensional coordinates and the second camera parameter set, determines a plurality of third pixel coordinates in a third image captured by a third camera, based on the plurality of three-dimensional coordinates and a third camera parameter set of the third camera, and calculates an evaluation value, based on pixel values at the plurality of second and third pixel coordinates in the second and third images; and a camera-parameter-set determiner that determines a fourth camera parameter set for the third camera, based on the evaluation value.
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公开(公告)号：US10271058B2
公开(公告)日：2019-04-23
申请号：US15612427
申请日：2017-06-02
Inventor： Satoshi Sato , Kunio Nobori , Takeo Azuma , Ayako Maruyama , Nobuhiko Wakai
IPC: G06T3/40 , H04N1/41 , H04N1/64 , H04N9/04 , H04N19/186
Abstract: An imaging apparatus includes an imaging optical system that forms an optical signal, an imaging device that includes a plurality of pixels and that converts the optical signal formed on the plurality of pixels into an electrical signal, a color filter that is arranged between the imaging optical system and the imaging device and that has a different optical transmittance for each of the plurality of pixels and each of a plurality of wavelength ranges, and a transmission data compression circuit that compresses the electrical signal obtained by the imaging device. The sum of products of an optical transmittance group relating to a plurality of optical transmittances of the color filter for each of the plurality of pixels in the plurality of wavelength ranges and coefficients common to the plurality of pixels is the same between the plurality of pixels.
