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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：US11277571B2
公开(公告)日：2022-03-15
申请号：US17136722
申请日：2020-12-29
Inventor： Kunio Nobori , Satoshi Sato , Takeo Azuma , Nobuhiko Wakai , Mitsuru Harada , Shinichi Machida , Masumi Izuchi
Abstract: An image generation device includes: a voltage generator that generates a plurality of voltages each having a different voltage value; an image capturer that includes an organic photoconductive film, and performs imaging every time each of the plurality of voltages is applied; a luminance data obtainer that obtains a plurality of luminance data items corresponding to the plurality of voltages applied, each of the plurality of luminance data items being obtained from the imaging performed by the image capturer; and a color image generator that generates a color image based on the plurality of luminance data items.
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公开(公告)号：US10984287B2
公开(公告)日：2021-04-20
申请号：US16399120
申请日：2019-04-30
Inventor： Satoshi Sato , Takeo Azuma , Kunio Nobori , Nobuhiko Wakai
Abstract: A learning device includes a memory and a processing circuit. The processing circuit: (a) obtains, from the memory, a first computational imaging image which includes an object, the first computational imaging image including a plurality of first pixels; (b) obtains, from the memory, a captured image which includes the object, the captured image including a plurality of second pixels; (c) obtains an identification result of identifying the object included in the captured image; (d) generates, with reference to correspondences between the plurality of first pixels and the plurality of second pixels, an identification model for identifying the first computational imaging image based on the identification result of identifying the object included in the captured image; and (e) outputs the identification model to an image identification device which identifies a second computational imaging image.
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公开(公告)号：US10757395B2
公开(公告)日：2020-08-25
申请号：US15961011
申请日：2018-04-24
Inventor： Kunio Nobori , Nobuhiko Wakai , Satoshi Sato , Takeo Azuma , Mikiya Nakata
IPC: H04N13/246 , H04N5/232 , G06T7/73 , G06T7/80 , H04N13/239 , B60R1/00 , H04N13/243
Abstract: A camera parameter set calculation method including (a1) acquiring a first image captured by a first camera and a second image captured by a second camera, (a2) acquiring camera parameter sets of the first and second cameras, (a3) extracting, from the first image, a predetermined portion having assumed three-dimensional position information, (a4) calculating three-dimensional coordinate sets corresponding to the predetermined portion on a basis of the assumed three-dimensional position information, the first image, and the first camera parameter set, (a5) determining first pixel coordinate pairs and second pixel coordinate pairs corresponding to the predetermined portion in the first image and second image, respectively, on the basis of the three-dimensional coordinate sets, (a6) calculating an evaluation value on the basis of pixel values at the first pixel coordinate pairs and pixel values at the second coordinate pairs, (a7) updating the camera parameter sets on the basis of the evaluation value.
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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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Patent Agency Ranking
公开(公告)号：US12026904B2
公开(公告)日：2024-07-02
申请号：US18119443
申请日：2023-03-09
Inventor： Satoshi Sato , Takeo Azuma , Nobuhiko Wakai , Kohsuke Yoshioka , Noritaka Shimizu , Yoshinao Kawai , Takaaki Amada , Yoko Kawai , Takeshi Murai , Hiroki Takeuchi
CPC classification number: G06T7/55 , G01S17/48 , G06T7/521 , G06T2207/10028 , G06T2207/10048
Abstract: A depth acquisition device includes a memory and a processor. The processor performs: acquiring timing information indicating a timing at which a light source irradiates a subject with infrared light; acquiring, from the memory, an infrared light image generated by imaging a scene including the subject with the infrared light according to the timing indicated by the timing information; acquiring, from the memory, a visible light image generated by imaging a substantially same scene as the scene of the infrared light image, with visible light from a substantially same viewpoint as a viewpoint of imaging the infrared light image at a substantially same time as a time of imaging the infrared light image; detecting a flare region from the infrared light image; and estimating a depth of the flare region based on the infrared light image, the visible light image, and the flare region.
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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：US10812691B2
公开(公告)日：2020-10-20
申请号：US16374641
申请日：2019-04-03
Inventor： Nobuhiko Wakai , Takeo Azuma , Kunio Nobori , Satoshi Sato
IPC: H04N5/225 , H04N13/204 , H04N13/128 , H04N5/232 , G03B37/00 , G03B19/07 , G03B15/00 , H04N13/00
Abstract: An image capturing apparatus includes a first camera that captures a first image, a second camera that captures a second image, a lens cover that includes transparent parts and ridgelines and that covers the first camera and the second camera, and a processing circuit that identifies a pixel located in an area, in which it is necessary to interpolate a pixel value, in the first image, and generates an output image using the first image and interpolation pixel information for interpolating a pixel value of the identified pixel. Each ridgeline between adjacent parts of the lens cover is twisted with respect to a base line extending between a center of a first lens of the first camera and a center of a second lens of the second camera. An upper part of the lens cover opposes a base on which the first camera and the second camera are disposed.
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10.发明授权公开(公告)号：US10484665B2
公开(公告)日：2019-11-19
申请号：US15952298
申请日：2018-04-13
Inventor： Kunio Nobori , Nobuhiko Wakai , Satoshi Sato , Takeo Azuma
IPC: H04N13/246 , G06T7/80 , H04N13/239 , H04N17/00
Abstract: A camera parameter set calculation method includes acquiring a first image from a first camera, a second image from a second camera, first and second camera parameter sets of the first camera and the second camera, calculating three-dimensional coordinate sets on the basis of the first image, the second image, the first camera parameter set, and the second camera parameter set, determining first pixel coordinate pairs obtained by projecting the three-dimensional coordinate sets onto the first image and second pixel coordinate pairs obtained by projecting the three-dimensional coordinate sets onto the second image, calculating an evaluation value on the basis of the pixel values at the first pixel coordinate pairs and the pixel values at the second pixel coordinate pairs, and updating the first camera parameter set and the second camera parameter set on a basis of the evaluation value.
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