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

IPC分类号： H04N1/40 ,  H04N1/409 ,  H04N1/00 ,  H04N1/387

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.

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

IPC分类号： H04N1/00 ,  H04N1/387 ,  H04N1/10

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 The position on the reading line is withdrawn from the sheet and adjacent to the reading guide.

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

IPC分类号： H04N1/04 ,  H04N1/00

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.

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

IPC分类号： H04N1/04 ,  H04N1/387 ,  H04N1/047

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.

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

IPC分类号： H04N1/04 ,  H04N1/00 ,  G06T7/194 ,  G06T7/13

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.

公开(公告)号：US10091383B2

公开(公告)日：2018-10-02

申请号：US15600156

申请日：2017-05-19

申请人： Naoki Goh ,  Masaki Nagase ,  Hiroki Shirado ,  Naoki Asaba ,  Shiho Shimosaka ,  Satoshi Hatanaka ,  Osamu Kizaki ,  Hiroshi Ishii ,  Masayuki Yabuuchi ,  Hideki Hashimoto ,  Atsushi Yoshida ,  Masafumi Kishi ,  Ayumu Hashimoto

发明人： Naoki Goh ,  Masaki Nagase ,  Hiroki Shirado ,  Naoki Asaba ,  Shiho Shimosaka ,  Satoshi Hatanaka ,  Osamu Kizaki ,  Hiroshi Ishii ,  Masayuki Yabuuchi ,  Hideki Hashimoto ,  Atsushi Yoshida ,  Masafumi Kishi ,  Ayumu Hashimoto

IPC分类号： H04N1/04 ,  G03G15/043 ,  G03G15/01 ,  H04N1/00

摘要： An image reading apparatus includes: a plurality of light sources to emit light to a target to be read from a plurality of different irradiation positions; an illumination controller to sequentially and alternately turn on or off the plurality of light sources with a blinking cycle not perceptible to the human eye; an image capturing device to photoelectrically convert, pixel by pixel, reflected light of the light emitted to the target from the plurality of light sources to capture a plurality of read images; a memory to store one or more read images of the plurality of read images being captured; and a synthesizer to synthesize preset regions of the plurality of read images using the one or more read images stored in the memory to generate a synthesized read image representing the target, the preset region of each of the plurality of read images having an image level change caused by reflected light that is smaller than a threshold.

公开(公告)号：US11277541B2

公开(公告)日：2022-03-15

申请号：US17035791

申请日：2020-09-29

申请人： Tatsuya Ozaki ,  Hiroki Shirado

发明人： Tatsuya Ozaki ,  Hiroki Shirado

IPC分类号： H04N1/40 ,  H04N1/409 ,  H04N1/00 ,  H04N1/58 ,  H04N1/60

摘要： A signal correction device includes a correction signal generator configured to generate a correction signal serving to remove noise superimposed on an input signal; a phase adjuster configured to shift a phase of the correction signal generated by the correction signal generator; a subtractor configured to generate an output signal for output by subtracting the correction signal from the input signal; a peak and bottom detector configured to detect a peak value and a bottom value of the output signal; and a determiner configured to determine a phase-shift amount of the phase adjuster from the peak value and the bottom value of the output signal detected by the peak and bottom detector. The determiner detects uncorrected noise from the peak value and the bottom value of the output signal from the subtractor, and sets the phase-shift amount such that the uncorrected noise is reduced to a minimum.

公开(公告)号：US10855866B2

公开(公告)日：2020-12-01

申请号：US16575457

申请日：2019-09-19

申请人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

发明人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

IPC分类号： H04N1/00

摘要： A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.

公开(公告)号：US20200120224A1

公开(公告)日：2020-04-16

申请号：US16575457

申请日：2019-09-19

申请人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

发明人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

IPC分类号： H04N1/00

摘要： A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.

公开(公告)号：US11095788B2

公开(公告)日：2021-08-17

申请号：US16589329

申请日：2019-10-01

申请人： Tadaaki Oyama ,  Masamoto Nakazawa ,  Hiroki Shirado ,  Tomohiro Sasa ,  Tatsuya Ozaki ,  Kohsuke Nambara

发明人： Tadaaki Oyama ,  Masamoto Nakazawa ,  Hiroki Shirado ,  Tomohiro Sasa ,  Tatsuya Ozaki ,  Kohsuke Nambara

IPC分类号： H04N1/00 ,  H04N1/028

摘要： A document size detection device includes: a light source that irradiates a document placed on placing means with scanning light via the placing means; a reading unit that receives reflection light from the document via the placing means to acquire image data of the document; and circuitry to set an illumination depth of the scanning light at a size detection time when the size is detected, shallower than an illumination depth of the scanning light at an image reading time when an image of the document is read, and detects, at the size detection time, the size based on a difference between first image data acquired in a state in which the scanning light is switched off and second image data acquired in a state in which the scanning light is switched on.