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公开(公告)号：US10951791B2
公开(公告)日：2021-03-16
申请号：US16800098
申请日：2020-02-25
申请人： Ayumu Hashimoto , Hajime Tsukahara , Hiroki Shirado , Yuuki Nakada , Tomohiko Ono , Tatsuya Ozaki , Hiroshi Kubo , Kimiharu Yanagisawa , Yoshiaki Nagao , Masahiro Itoh
发明人： Ayumu Hashimoto , Hajime Tsukahara , Hiroki Shirado , Yuuki Nakada , Tomohiko Ono , Tatsuya Ozaki , Hiroshi Kubo , Kimiharu Yanagisawa , Yoshiaki Nagao , Masahiro Itoh
摘要： An image processing apparatus includes circuitry to: obtain a read image read from an image of a document output from an image reading device; detect an edge between a background area and a document area in the read image; sample a detection result of the edge at each first interval in a first direction to extract a first boundary point group including a plurality of boundary points; sample the detection result of the edge at each second interval in the first direction to extract a second boundary point group including a plurality of boundary points; determine a noise removal condition based on the first boundary point group; remove, from the second boundary point group, a boundary point satisfying the noise removal condition as noise; and calculate a linear equation approximating the second boundary point group from which the noise is removed.
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公开(公告)号：US11102364B2
公开(公告)日：2021-08-24
申请号：US16776521
申请日：2020-01-30
申请人： Yuuki Nakada , Hajime Tsukahara , Hiroki Shirado , Ayumu Hashimoto , Tomohiko Ono , Tatsuya Ozaki , Hiroshi Kubo , Yoshiaki Nagao , Kimiharu Yanagisawa , Masahiro Itoh
发明人： Yuuki Nakada , Hajime Tsukahara , Hiroki Shirado , Ayumu Hashimoto , Tomohiko Ono , Tatsuya Ozaki , Hiroshi Kubo , Yoshiaki Nagao , Kimiharu Yanagisawa , Masahiro Itoh
摘要： An inclination detecting device includes processing circuitry. The processing circuitry is configured to detect, in image information that is an image of an object imaged by an imaging device at an imaging position where a background member forms a background, a first boundary between the background member and a shadow of the object at detection positions in at least one of main-scanning and sub-scanning directions on an outline of the object; detect a second boundary between the object and the shadow of the object at detection positions in at least one of the main-scanning and sub-scanning directions on the outline of the object in the image information; detect a boundary group including detection results of the second boundary at the detection positions; and detect an inclination of the object in the image information from detection results of the first boundary, the second boundary, and the boundary group.
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3.发明授权公开(公告)号：US11102375B2
公开(公告)日：2021-08-24
申请号：US16654007
申请日：2019-10-16
申请人： Hiroshi Kubo , Kimiharu Yanagisawa , Hajime Tsukahara , Yoshiaki Nagao , Masahiro Itoh , Tatsuya Ozaki , Tomohiko Ono , Yuuki Nakada , Hiroki Shirado , Ayumu Hashimoto
发明人： Hiroshi Kubo , Kimiharu Yanagisawa , Hajime Tsukahara , Yoshiaki Nagao , Masahiro Itoh , Tatsuya Ozaki , Tomohiko Ono , Yuuki Nakada , Hiroki Shirado , Ayumu Hashimoto
摘要： A sheet reading apparatus includes a sheet table on which a sheet is placed, a conveyor configured to convey the sheet, a reading guide configured to guide the sheet conveyed by the conveyor, and a reading device configured to read a shadow of the sheet conveyed by the conveyor, for detection of an inclination of the sheet. The sheet reading apparatus further includes a transparent member disposed at a position on a reading line of the reading device. The position on the reading line is withdrawn from the sheet and adjacent to the reading guide.
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公开(公告)号：US11115561B2
公开(公告)日：2021-09-07
申请号：US16775287
申请日：2020-01-29
申请人： Hajime Tsukahara , Hiroki Shirado , Ayumu Hashimoto , Yuuki Nakada , Tomohiko Ono , Tatsuya Ozaki , Hiroshi Kubo , Yoshiaki Nagao , Kimiharu Yanagisawa , Masahiro Itoh
发明人： Hajime Tsukahara , Hiroki Shirado , Ayumu Hashimoto , Yuuki Nakada , Tomohiko Ono , Tatsuya Ozaki , Hiroshi Kubo , Yoshiaki Nagao , Kimiharu Yanagisawa , Masahiro Itoh
摘要： An inclination detecting device includes processing circuitry. The processing circuitry is configured to detect, in image information that is an image of an object imaged by an imaging device at an imaging position where a background member forms a background, a first boundary between the background member and a shadow of the object; detect a second boundary between the object and the shadow of the object in the image information; and detect an inclination of the object in the image information from the first boundary and the second boundary detected by the processing circuitry.
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公开(公告)号：US11102365B2
公开(公告)日：2021-08-24
申请号：US16841708
申请日：2020-04-07
申请人： Tomohiko Ono , Hajime Tsukahara , Hiroki Shirado , Ayumu Hashimoto , Yuuki Nakada , Tatsuya Ozaki , Hiroshi Kubo , Yoshiaki Nagao , Kimiharu Yanagisawa , Masahiro Itoh
发明人： Tomohiko Ono , Hajime Tsukahara , Hiroki Shirado , Ayumu Hashimoto , Yuuki Nakada , Tatsuya Ozaki , Hiroshi Kubo , Yoshiaki Nagao , Kimiharu Yanagisawa , Masahiro Itoh
摘要： An edge detecting device includes processing circuitry. The processing circuitry is configured to acquire first color information and second color information in an image including a document region and a background region outside the document region. The first color information is color information of the background region and the second color information is color information of the document region. The processing circuitry is configured to detect a boundary between the background region and the document region from a change in color information between the first color information and the second color information.
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公开(公告)号：US11838481B2
公开(公告)日：2023-12-05
申请号：US17823547
申请日：2022-08-31
申请人： Takahiro Kurakata , Yuuki Nakada
发明人： Takahiro Kurakata , Yuuki Nakada
CPC分类号： H04N1/401 , H04N1/00814 , H04N1/02835 , G01K13/00 , H04N2201/0081
摘要： An image reading apparatus includes a light emitter to irradiate a document with light, a first light guide to guide the light reflected by the document, an output device to output a readout signal obtained from the light reflected and guided by the first light guide, a base to correct shading in the readout signal, and circuitry to output a scanned image in which the shading of the document in the readout signal is corrected, based on correction data obtained from the readout signal of the base output from the output device, control a timing at which the light emitter emits the light and a timing at which the output device outputs a signal, and heat the first light guide with the light emitted from the light emitter before the output device outputs the readout signal of each of the document and the base.
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公开(公告)号：US20230156139A1
公开(公告)日：2023-05-18
申请号：US17823547
申请日：2022-08-31
申请人： Takahiro Kurakata , Yuuki Nakada
发明人： Takahiro Kurakata , Yuuki Nakada
CPC分类号： H04N1/401 , H04N1/02835 , H04N1/00814 , H04N2201/0081 , G01K13/00
摘要： An image reading apparatus includes a light emitter to irradiate a document with light, a first light guide to guide the light reflected by the document, an output device to output a readout signal obtained from the light reflected and guided by the first light guide, a base to correct shading in the readout signal, and circuitry to output a scanned image in which the shading of the document in the readout signal is corrected, based on correction data obtained from the readout signal of the base output from the output device, control a timing at which the light emitter emits the light and a timing at which the output device outputs a signal, and heat the first light guide with the light emitted from the light emitter before the output device outputs the readout signal of each of the document and the base.
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