Patents by Inventor Nobuhisa Yamazaki
Nobuhisa Yamazaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8991820Abstract: There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium that can suppress erroneous detection of a jam. The paper conveying apparatus includes a sound signal generator, provided with a sound detector near a conveyance path of a paper, for generating a sound signal, and a sound jam detector for determining whether a jam has occurred based on a variation of a component of the sound signal.Type: GrantFiled: August 9, 2013Date of Patent: March 31, 2015Assignee: PFU LimitedInventors: Masanobu Hongo, Tetsuo Funada, Nobuhisa Yamazaki
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Patent number: 8857815Abstract: There is provided a paper feeding device including: a microphone which detects sound occurred on a paper conveying path; a pre-processing unit which performs pre-processing on a signal of the sound detected by the microphone; and a jam detection unit which detects a jam of paper based on the sound signal on which the pre-processing is performed, a reference value about intensity of the sound, and a reference value about a duration time of the sound.Type: GrantFiled: November 30, 2011Date of Patent: October 14, 2014Assignee: PFU LimitedInventors: Masanobu Hongo, Tetsuo Funada, Nobuhisa Yamazaki
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Publication number: 20140077446Abstract: There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium that can suppress erroneous detection of a jam. The paper conveying apparatus includes a sound signal generator, provided with a sound detector near a conveyance path of a paper, for generating a sound signal, and a sound jam detector for determining whether a jam has occurred based on a variation of a component of the sound signal.Type: ApplicationFiled: August 9, 2013Publication date: March 20, 2014Applicant: PFU LIMITEDInventors: Masanobu Hongo, Tetsuo Funada, Nobuhisa Yamazaki
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Patent number: 8554012Abstract: An image processing apparatus including an image photographing unit, and a control unit, wherein the control unit includes a document image acquiring unit that acquires a document image including at least an image of a document, a contour extracting unit that extracts a contour of the document from the document image, the extracting the contour being performed based on luminance, a distortion position detecting unit that detects a contour straight line located at a location where a distance between the contour and a center point of a rectangle having the minimum area surrounding the contour is shortest, the contour straight line being detected as a distortion position in the document, the contour straight line being located on the contour, and a corrected image generating unit that performs a geometric correction on the document image to extend the contour to a correction reference line determined from the distortion position, and generates a corrected image having the distortion in the document image correctType: GrantFiled: August 31, 2009Date of Patent: October 8, 2013Assignee: PFU LimitedInventors: Jiyun Du, Satoshi Miyamoto, Nobuhisa Yamazaki
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Patent number: 8508750Abstract: A friction-coefficient estimating device is configured to estimate friction coefficient of the surface of a medium in a form of a sheet by irradiating a light on the surface and by detecting specularly-reflected light component of a reflected light and a diffusely-reflected light intensity.Type: GrantFiled: April 28, 2011Date of Patent: August 13, 2013Assignee: PFU LimitedInventors: Shigeharu Okano, Nobuhisa Yamazaki
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Patent number: 8448937Abstract: A medium supplying apparatus includes a separation mechanism that separates one medium at a time from a plurality of sheet-shaped media stacked in a loading rack and transports the medium, an irradiation unit that emits light onto a surface of the medium, and a light receiving unit that receives reflected light that is acquired by allowing the light emitted by the irradiation unit to be reflected from the surface and detects a reflected light intensity that is an intensity of the reflected light. The separating force of the separation mechanism that is used for separating a next medium is controlled based on the reflected light intensity detected by the light receiving unit.Type: GrantFiled: April 28, 2011Date of Patent: May 28, 2013Assignee: PFU LimitedInventors: Shigeharu Okano, Nobuhisa Yamazaki
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Publication number: 20120235929Abstract: There is provided a paper feeding device including: a microphone which detects sound occurred on a paper conveying path; a pre-processing unit which performs pre-processing on a signal of the sound detected by the microphone; and a jam detection unit which detects a jam of paper based on the sound signal on which the pre-processing is performed, a reference value about intensity of the sound, and a reference value about a duration time of the sound.Type: ApplicationFiled: November 30, 2011Publication date: September 20, 2012Applicant: PFU LIMITEDInventors: Masanobu HONGO, Tetsuo FUNADA, Nobuhisa YAMAZAKI
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Publication number: 20110310398Abstract: A friction-coefficient estimating device is configured to estimate friction coefficient of the surface of a medium in a form of a sheet by irradiating a light on the surface and by detecting specularly-reflected light component of a reflected light and a diffusely-reflected light intensity.Type: ApplicationFiled: April 28, 2011Publication date: December 22, 2011Inventors: Shigeharu OKANO, Nobuhisa Yamazaki
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Publication number: 20110309568Abstract: A medium supplying apparatus includes a separation mechanism that separates one medium at a time from a plurality of sheet-shaped media stacked in a loading rack and transports the medium, an irradiation unit that emits light onto a surface of the medium, and a light receiving unit that receives reflected light that is acquired by allowing the light emitted by the irradiation unit to be reflected from the surface and detects a reflected light intensity that is an intensity of the reflected light. The separating force of the separation mechanism that is used for separating a next medium is controlled based on the reflected light intensity detected by the light receiving unit.Type: ApplicationFiled: April 28, 2011Publication date: December 22, 2011Inventors: Shigeharu OKANO, Nobuhisa YAMAZAKI
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Patent number: 7907171Abstract: A notebook information processor includes a lid including an image photographing unit and a display, and a main body, wherein the control unit includes a live view displaying unit that displays a live view obtained by photographing at least a portion of the main body within a photographing area of the image photographing unit on the display, a rectangle detecting unit that detects a rectangle for calculating a projective transformation parameter from the live view, a projective transformation parameter calculating unit that calculates the projective transformation parameter from a coordinate of the rectangle, and a still image obtaining unit that performs a projective transformation on the live view so as to obtain a live view photographed from a front direction, using the projective transformation parameter, obtains a still image from the live view after the projective transformation, and stores the still image in the storage unit.Type: GrantFiled: October 9, 2008Date of Patent: March 15, 2011Assignee: PFU LimitedInventors: Satoshi Miyamoto, Nobuhisa Yamazaki, Jiyun Du, Masanari Takabatake
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Patent number: 7903171Abstract: A notebook information processor includes an image photographing unit, a display, a keyboard, a storage unit, and a control unit, wherein the control unit includes, a live view displaying unit that displays a live view obtained by photographing at least a portion of the keyboard within a photographing area of the image photographing unit on the display, a still image obtaining unit that obtains a still image from the live view displayed on the display by the live view displaying unit, when receiving a photographing start signal to start photographing the still image of a document put on the keyboard, and an image processing unit that performs projective transformation on the still image obtained by the still image obtaining unit so as to obtain an image photographed from a front direction, executes image processing so as to perform cropping to clip the document, and stores a transformed image of the document after the image processing in the storage unit.Type: GrantFiled: October 15, 2008Date of Patent: March 8, 2011Assignee: PFU LimitedInventors: Masanari Takabatake, Nobuhisa Yamazaki, Satoshi Miyamoto, Jiyun Du
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Patent number: 7893973Abstract: Document image data is converted into luminance image data. Block image data is generated from the luminance image data. Start point block pixel data and end point block pixel data are set based on a change rate of luminance values of adjacent block pixel data. A luminance value of block pixel data between the start point block pixel data and the end point block pixel data is corrected based on a start point luminance value and an end point luminance value. The luminance value, of the block pixel data wherein each luminance value of an adjacent block pixel data cluster is less than an average value, is substituted by the average value. The luminance value of each pixel data is set based on the luminance value of the block pixel data. Post process luminance image data that includes each pixel data is reconverted into the document image data.Type: GrantFiled: August 6, 2008Date of Patent: February 22, 2011Assignee: PFU LimitedInventors: Jiyun Du, Satoshi Miyamoto, Nobuhisa Yamazaki
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Publication number: 20100135595Abstract: An image processing apparatus including an image photographing unit, and a control unit, wherein the control unit includes a document image acquiring unit that acquires a document image including at least an image of a document, a contour extracting unit that extracts a contour of the document from the document image, the extracting the contour being performed based on luminance, a distortion position detecting unit that detects a contour straight line located at a location where a distance between the contour and a center point of a rectangle having the minimum area surrounding the contour is shortest, the contour straight line being detected as a distortion position in the document, the contour straight line being located on the contour, and a corrected image generating unit that performs a geometric correction on the document image to extend the contour to a correction reference line determined from the distortion position, and generates a corrected image having the distortion in the document image correctType: ApplicationFiled: August 31, 2009Publication date: June 3, 2010Applicant: PFU LIMITEDInventors: Jiyun Du, Satoshi Miyamoto, Nobuhisa Yamazaki
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Publication number: 20090262199Abstract: A notebook information processor includes a lid including an image photographing unit and a display, and a main body, wherein the control unit includes a live view displaying unit that displays a live view obtained by photographing at least a portion of the main body within a photographing area of the image photographing unit on the display, a rectangle detecting unit that detects a rectangle for calculating a projective transformation parameter from the live view, a projective transformation parameter calculating unit that calculates the projective transformation parameter from a coordinate of the rectangle, and a still image obtaining unit that performs a projective transformation on the live view so as to obtain a live view photographed from a front direction, using the projective transformation parameter, obtains a still image from the live view after the projective transformation, and stores the still image in the storage unit.Type: ApplicationFiled: October 9, 2008Publication date: October 22, 2009Applicant: PFU LIMITEDInventors: Satoshi MIYAMOTO, Nobuhisa Yamazaki, Jiyun Du, Masanari Takabatake
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Publication number: 20090262200Abstract: A notebook information processor includes an image photographing unit, a display, a keyboard, a storage unit, and a control unit, wherein the control unit includes, a live view displaying unit that displays a live view obtained by photographing at least a portion of the keyboard within a photographing area of the image photographing unit on the display, a still image obtaining unit that obtains a still image from the live view displayed on the display by the live view displaying unit, when receiving a photographing start signal to start photographing the still image of a document put on the keyboard, and an image processing unit that performs projective transformation on the still image obtained by the still image obtaining unit so as to obtain an image photographed from a front direction, executes image processing so as to perform cropping to clip the document, and stores a transformed image of the document after the image processing in the storage unit.Type: ApplicationFiled: October 15, 2008Publication date: October 22, 2009Applicant: PFU LIMITEDInventors: Masanari Takabatake, Nobuhisa Yamazaki, Satoshi Miyamoto, Jiyun Du
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Publication number: 20090147105Abstract: Document image data is converted into luminance image data. Block image data is generated from the luminance image data. Start point block pixel data and end point block pixel data are set based on a change rate of luminance values of adjacent block pixel data. A luminance value of block pixel data between the start point block pixel data and the end point block pixel data is corrected based on a start point luminance value and an end point luminance value. The luminance value, of the block pixel data wherein each luminance value of an adjacent block pixel data cluster is less than an average value, is substituted by the average value. The luminance value of each pixel data is set based on the luminance value of the block pixel data. Post process luminance image data that includes each pixel data is reconverted into the document image data.Type: ApplicationFiled: August 6, 2008Publication date: June 11, 2009Applicant: PFU LIMITEDInventors: Jiyun Du, Satoshi Miyamoto, Nobuhisa Yamazaki
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Publication number: 20090008861Abstract: A sheet feeding device includes a feeding unit that feeds a sheet; a rolling member that rolls by having contact with the sheet being fed by the feeding unit; a supporting member that moves along with a behavior of the sheet with supporting the rolling member so that the rolling member rolls in a feeding direction of the sheet at a predetermined position on the sheet; an acceleration measuring unit that measures accelerations acting on the supporting member in three directions; and a detecting unit that detects a feed error of the sheet based on the accelerations measured by the acceleration measuring unit.Type: ApplicationFiled: April 21, 2008Publication date: January 8, 2009Applicant: PFU LIMITEDInventors: Yuki KASAHARA, Koichi MINAMI, Nobuhisa YAMAZAKI, Masaya TAKAMORI
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Patent number: 7447363Abstract: After reading a predetermined number of predetermined blocks for each of a plurality of image data, a first image read unit 13 reads out the plurality of image data read in parallel by repeatedly switching the designated order of the plurality of image data. A JPEG compression unit 14 performs image compression on the plurality of image data read out in block units by the first image read unit 13, image-compresses a predetermined number of the blocks for each of the plurality of image data, and then inserts an identifier after the last block of the predetermined number of blocks.Type: GrantFiled: April 28, 2003Date of Patent: November 4, 2008Assignee: PFU LimitedInventors: Tomoya Tanabe, Nobuhisa Yamazaki, Yasushi Takemura, Kunihiko Oumi, Shougou Maki, Satoshi Kubo, Ikuo Murata, Yukio Kaji
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Patent number: 7293114Abstract: A scanner system includes a scanner, computers sharing the scanner, a network connecting between them, and a scanner controlling apparatus connected between the network and the scanner. The computer includes a device driver to control the scanner and notify the scanner controlling apparatus of an event in the device driver, and an application to control the device driver, and transmit and receive data to and from the scanner controlling apparatus. The application activates the device driver in response to the trigger input from the scanner controlling apparatus. When activating, the device driver receives image data from the scanner controlling apparatus through the application.Type: GrantFiled: March 18, 2003Date of Patent: November 6, 2007Assignee: PFU LimitedInventors: Mitsuhiro Yashiki, Yasushi Takemura, Nobuhisa Yamazaki
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Publication number: 20050157934Abstract: After reading a predetermined number of predetermined blocks for each of a plurality of image data, a first image read unit 13 reads out the plurality of image data read in parallel by repeatedly switching the designated order of the plurality of image data. A JPEG compression unit 14 performs image compression on the plurality of image data read out in block units by the first image read unit 13, image-compresses a predetermined number of the blocks for each of the plurality of image data, and then inserts an identifier after the last block of the predetermined number of blocks.Type: ApplicationFiled: April 28, 2003Publication date: July 21, 2005Inventors: Tomoya Tanabe, Nobuhisa Yamazaki, Yasushi Takemura, Kunihiko Oumi, Shougou Maki, Satoshi Kubo, Ikuo Murata, Yukio Kaji