Shade Correction Patents (Class 358/461)
  • Patent number: 10477051
    Abstract: Provided is a reading kit including a reading unit configured to read an image of an original being conveyed in a predetermined direction at a predetermined reading position, and a white reference sheet comprising a white reference portion to be read by the reading unit and an engaged portion to be engaged with a positioning member. The white reference portion being arranged at the predetermined reading position by engaging the engaged portion with the positioning member.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomofumi Sakuma
  • Patent number: 10469176
    Abstract: The present invention is directed to communication systems and methods. In a specific embodiment, the present invention provides an optical receiver that receives a data stream from an optical transmitter. The optical receiver determines a histogram contour parameter using the data stream and inserts the histogram contour parameter into a back-channel data segment, which is then transmitted to the optical transmitter. The optical transmitter changes its data transmission setting based on the histogram contour parameter. There are other embodiments as well.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: November 5, 2019
    Assignee: INPHI CORPORATION
    Inventors: Todd Rope, Hari Shankar, Radhakrishnan L. Nagarajan
  • Patent number: 10458924
    Abstract: A defect inspection apparatus includes a light irradiation unit irradiating a sample placed on a table unit with illumination light, a detection optical system forming a scattered light image from the sample and detecting the generated scattered light image through an image sensor, a processing unit receiving a signal from the image sensor of the detection optical system that detects the scattered light image, generating an image of the scattered light, and detecting a defect of the sample by processing the generated image, an output unit outputting the defect image processed by the image processing unit, and a control unit controlling the stable unit, the light irradiation unit, the detection optical system, and the image processing unit. The image processing unit includes an image generation unit that receives the signal and generates the image, a correction unit that corrects lightness discontinuity and a defect detection unit for image processing.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: October 29, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hisaaki Kanai, Masami Makuuchi, Yukihisa Mohara, Eiji Imai
  • Patent number: 10452922
    Abstract: An image enhancement method for video analysis or automatic video surveillance systems has at least one image acquisition device, through which an IR thermal spectrum image is captured from an area of space, a scene calibration system and a detection system, through which at least one object type is detected. The method includes at least one processing stage in which the contrast of the captured image is enhanced by the image acquisition device through the image's depth or scene information obtained directly or indirectly by the scene calibration system or entered manually by the user.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: October 22, 2019
    Assignee: DAVANTIS TECHNOLOGIES SL
    Inventors: Nicolas Herrero Molina, Marti Balcells Capellades, Jordi Lluis Barba
  • Patent number: 10447890
    Abstract: Provided is an image reading apparatus for suppressing an image defect ascribable to shading correction using a white reference plate arranged at a position different from a reading position of an original. The image reading apparatus includes a reading unit configured to read an image from the original passing through the reading position, the white reference plate arranged such that a distance between the reading unit and the white reference plate is larger than the distance between the reading unit and the reading position, and a control system. The control system includes a memory for backup configured to store in advance correlation data representing a correlation between a reading result of the white reference plate obtained by the reading unit, and a reading result of a reference member having a uniform density and arranged at the reading position.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: October 15, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryo Mikami, Yushi Oka, Masato Furukawa, Kaoru Hamada, Shinichi Ikoma
  • Patent number: 10438357
    Abstract: An interactive image segmenting apparatus and method are provided. The image segmenting apparatus and corresponding method include a boundary detector, a condition generator, and a boundary modifier. The boundary detector is configured to detect a boundary from an image using an image segmentation process. The feedback receiver is configured to receive information about the detected boundary. The condition generator is configured to generate a constraint for the image segmentation process based on the information. The boundary modifier is configured to modify the detected boundary by applying the generated constraint to the image segmentation process.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: October 8, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Won Sik Kim
  • Patent number: 10389903
    Abstract: An image scanning apparatus includes a controller configured to perform a light quantity adjustment determining process to determine whether a detection light quantity needs to be adjusted, based on adjustment determination values, in a black-white detectable position, a light quantity adjusting process to adjust the detection light quantity to maximize an adjustment difference value between a gradation value generated by scanning a white portion of a reference member and a gradation value generated by scanning a black portion of the reference member, a threshold calculating process to calculate a detection threshold based on a black value and a white value, and a reference position detecting process to detect a reference position by comparing, with the detection threshold, gradation values generated by scanning the reference member while illuminating the reference member with the detection light quantity.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: August 20, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Jie Zheng
  • Patent number: 10372981
    Abstract: Determining if a document is a text page includes partitioning the document into a plurality of cells, scaling each of the cells to a standardized number of pixels to provide a corresponding snippet for each of the cells, using a classifier to examine the snippets to determine which of the cells are classified as text and which of the cells are not classified as text, determining a volume of text for the document based on a total amount of text in the document corresponding to a sum of an amount of text in each of the cells classified as text, and determining that the document is a text page in response to the total amount exceeding a pre-determined threshold. In response to the total amount being less than the pre-determined threshold, cells not classified as text may be examined further. The classifier may be provided by training a neural net.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: August 6, 2019
    Assignee: EVERNOTE CORPORATION
    Inventors: Alexander Pashintsev, Boris Gorbatov, Eugene Livshitz, Vitaly Glazkov
  • Patent number: 10367971
    Abstract: A crease detecting unit 13 detects a crease in a document image. A toner peeling detecting unit (a) detects as a toner peeling part a pixel area on the crease, the pixel area (a1) having a width of the predetermined number of pixels in a direction perpendicular to the crease, (a2) having a background color, and (a3) of which both sides are adjacent to at least two pixels in a direction perpendicular to the crease, the at least two pixels having a color other than the back ground color, and (b) corrects a pixel value of the toner peeling part on the basis of pixel values of at least two pixels adjacent to both sides of the pixel area.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: July 30, 2019
    Assignee: Kyocera Document Solutions, Inc.
    Inventor: Kazuhiro Kanamaru
  • Patent number: 10362189
    Abstract: An image reading apparatus includes a moving unit, a first detecting unit, and a second detecting unit. The moving unit moves a calibration plate in the main scanning direction relatively to a reading apparatus. The calibration plate is a plate for calibrating the reading apparatus. The reading apparatus has a reading unit and reading glass. The reading unit is arranged in the main scanning direction. The reading glass is disposed on a reading surface side of the reading unit. The first detecting unit detects an abnormality on the calibration plate from reading results. The reading results are obtained in such a manner that, while the moving unit is controlled to move the calibration plate, the reading unit reads the calibration plate. The second detecting unit detects an abnormality on the reading glass from the reading results.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: July 23, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Masaki Fujise
  • Patent number: 10277846
    Abstract: A photoelectric conversion element comprises: a plurality of pixels, each of which performs photoelectric conversion and outputs an analog signal; an analog processing unit that sequentially processes, on a pixel-to-pixel basis, the analog signals output from a pixel group including the pixels; and a signal supply unit that supplies a signal needed for preliminary operation to the analog processing unit so as to enable the analog processing unit to perform the preliminary operation before the analog processing unit starts to process the analog signals output from the pixel group.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: April 30, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naoki Asaba, Masamoto Nakazawa
  • Patent number: 10277776
    Abstract: An image reading device includes: a scanner having characteristics of causing a distorted sine wave being formed by its obtained image data and being represented as an array of shade values arranged in a main scanning direction; a reference member to be scanned; a hardware processor that: obtains a shade value at each main scanning coordinate from shading reference data obtained from the reference member; detects the start and end position of a distorted waveform range in the shading reference data; defines the start and end position of a target range as the main scanning coordinates of two peaks, the two peaks being in a distorted sine wave formed by the shading reference data, the two peaks being within a predetermined reference distance to the right and left of the start and end position; and replaces a part of data in the target range with a substitute part of data.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: April 30, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shota Fujioka, Tomoo Yamanaka, Tomohiro Yamaguchi
  • Patent number: 10218872
    Abstract: A document reading device (20) includes: a document conveyance section (6) and a document reading device (5). A conveyed document reading region (161b) has: a document discharge guide (51) arranged downstream of an image reading position (163a) in a document conveyance direction; and a transparent reading sheet (52) provided along a surface of the contact glass (161) and a surface of the document discharge guide (51), the document conveyance section (6) has a reading guide (62) forming a document conveyance path oppositely to the conveyed document reading region (161b), and the reading guide (62) has, on part of a surface opposing the conveyed document reading region (161b), a black reference member (620) optically read by an image reading section (163) for the purpose of correcting black reference data of an image of the document conveyed by the document conveyance section (6) and read by the document reading device (5).
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: February 26, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yasuyuki Horiguchi
  • Patent number: 10209660
    Abstract: Provided is an image formation device for forming a toner image as an image to be printed on a sheet to transfer and fix the unfixed toner image onto the sheet, wherein a density adjustment setting of optionally adjusting a density of a printed image by a user is provided as a printing condition, and a toner increase mode for applying, to the sheet, more toner than that in a case of selecting a maximum density selectable in the density adjustment setting is provided as a printing mode.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: February 19, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masanori Murakami
  • Patent number: 10171693
    Abstract: An apparatus can include a frame having a first side and a second side spaced apart from and substantially parallel to the first side by a third side that interconnects and extends longitudinally between the first side and the second side. The third side can define a portion of a media path. A surface of the third side includes a calibration area in the media path, the calibration area extending from an input edge to an exit edge in a media path direction that is substantially transverse to the longitudinal dimension of the third side. A plurality of bars can protrude outwardly from the surface of the third side in the calibration area. Each of the bars extends in the media path direction and has a leading edge and a trailing edge, the leading edge.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: January 1, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David M. Payne, Edward A. Hill
  • Patent number: 10171694
    Abstract: A conveyance device that conveys paper through a conveyance path along a surface thereof includes: a conveyance guide that has a guide surface to be a wall surface on one side of the conveyance path, an opening being formed in the guide surface; a paper detection unit at least including a detection member, which is arranged in a space that communicates with the conveyance path through the opening, and configured to detect, with the detection member, a leading end of the paper that reaches the opening; and a movable body that brings the detection member into a retracted state, in which a main part thereof is covered from the space, after the leading end of the paper is detected.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: January 1, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yutaka Mizota, Ichiro Muramatsu, Akiyoshi Johdai
  • Patent number: 10136027
    Abstract: An image reading apparatus according to an embodiment includes an image reading unit configured to generate reference data by reading a reference surface and to generate image data by reading a sheet. A reference unit has a reference surface. A shading correction unit determines whether a portion of the reference surface includes a contaminant based on image data generated by the image reading unit reading the portion of the reference unit. When the portion of the reference surface is determined to not include a contaminant, the shading correction unit generates reference data based on the image data generated by the image reading unit reading the portion of the reference surface determined to not include a contaminant.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: November 20, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Naoyuki Misaka
  • Patent number: 10122885
    Abstract: An image reading device includes: an FB glass; a sensor module having a light source and a plurality of sensors; and an image processor that generates correction data to be used for shading correction and performs the shading correction on image signals by using the correction data. The plurality of sensors is arranged in a main scanning direction and is configured to form an image signal on a single line. The image processor acquires second black data by causing the plurality of sensors to acquire an image signal of a reference sheet placed on the FB glass with the light source turned on, and generates black correction data based on the second black data. By performing the shading correction by using the black correction data, the image processor corrects density unevenness, in an image, caused by interference between image signals from the plurality of sensors.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: November 6, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hirotsugu Fusayasu, Ryo Matsubara, Katsuo Inokuchi, Tatsuya Hirota, Yuuichi Tutiya
  • Patent number: 10104252
    Abstract: An image reading device, which is included in an image forming apparatus and used to perform a method of reading images, includes an image reading body configured to read one of a recording medium and the recording medium together with a background area adjacent to the recording medium, a moving body disposed facing the image reading body, and a reference body as a reference in shading correction. The moving body is configured to hold the recording medium and the reference body in a direction intersecting a sheet conveying direction of the recording medium such that the recording medium and the reference body contact to and separate from the image reading body.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 16, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuo Watanabe, Hideyuki Takayama, Katsuaki Miyawaki, Hiromichi Matsuda, Atsuyuki Oyamada, Jun Yamane, Takashi Hashimoto
  • Patent number: 10091393
    Abstract: A document conveying and reading device includes a drive motor, a paper ejection roller driven by the drive motor, a first reading unit arranged along a document conveying path to face one surface of the document, and a shading roller arranged along the document conveying path to face the first reading unit. The shading roller includes a white reference member used for shading correction and a conveying guide for a document that is conveyed along the document conveying path, is driven by the drive motor together with the paper ejection roller when the drive motor drives the paper ejection roller to rotate in the second direction, and is not driven by the drive motor together with the paper ejection roller when the drive motor drives the paper ejection roller to rotate in the first direction.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: October 2, 2018
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventor: Takeshi Ito
  • Patent number: 10091390
    Abstract: An image processing apparatus obtains image data of a document image and extracts a plurality of feature points of the document image. The image processing apparatus obtains a skew angle of the document image with respect to a predetermined direction and an assembling angle of an image obtaining unit with respect to a predetermined assembling direction from a coordinate correspondence relationship between coordinates of a plurality of feature points of a registered document image registered in advance and coordinates of the plurality of extracted feature points of the document image.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: October 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hirowo Inoue, Eiichi Takagi
  • Patent number: 10070011
    Abstract: In accordance with an embodiment, an image reading apparatus comprises a sensor configured to read an image in a main scanning direction; a first reference plate; a second reference plate; and a processor configured to determine a parameter for shifting shading correction data on the basis of first reference data obtained through reading on the first reference plate by the sensor and second reference data obtained through reading on the second reference plate by the sensor, set the shading correction data on the basis of data obtained through the reading on the first reference plate by the sensor, acquire image data at each reading position in the sub-scanning direction by the sensor and carry out shading correction on the image data on the basis of the shading correction data shifted according to a shift amount at the each reading position obtained from the parameter.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: September 4, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Naoyuki Misaka, Toshimitsu Ichiyanagi
  • Patent number: 10070015
    Abstract: An image reading apparatus according to an embodiment of the present invention includes: an image sensor to read a document; a movement unit configured to relatively move the document and the image sensor by using a motor as a drive source; an output unit configured to output data of a plurality of colors based on accumulated light-receiving signals by accumulating the light-receiving signals from the image sensor for each color in order for each line in a direction of the movement based on an encoder pulse output from an encoder in accordance with rotation of the motor; and a correction unit configured to perform shading correction for each piece of data of the plurality of colors output by the output unit by using a correction value to correct influence on data of the plurality of colors due to a dark current in the image sensor based on shading data.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: September 4, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuichi Yanagiwara
  • Patent number: 10063744
    Abstract: An image reading device includes a first unit to read one surface of a document in a first area facing a document path, a second unit disposed in the first area to read the other surface of the document, a first reference member facing the first unit at a first distance therefrom at a second position in a second area not facing the path, a second reference member facing the first unit at a second distance therefrom at a first position in the first area, a third reference member facing the second unit at the second distance therefrom, and a correction unit to correct, based on a difference between first data generated through reading of the first member by the first unit and second data generated through reading of the second member by the first unit, third data generated through reading of the third member by the second unit.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: August 28, 2018
    Assignee: Ricoh Company, Ltd
    Inventors: Susumu Miyazaki, Tomoyuki Yoshida, Tetsuo Inui, Shigefumi Imoto
  • Patent number: 10038821
    Abstract: An image reading apparatus that makes it possible to reduce the influences of dirt on a white reference chart itself, stripes caused by dust, and the like, and thereby generate accurate data for shading correction. An image processor performs shading correction on image data read by a reader unit. The read image data is compared with threshold values set for each pixel, and a pixel which is out of a range of the threshold values is determined as a singular point pixel. Data of a pixel determined as a singular point pixel is interpolated from data around the singular point pixel. Data of a pixel which is not determined as a singular point pixel is adopted as valid shading correction data. An operation controller controls the number of effective sampling lines from start to termination of sampling to be performed.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: July 31, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Morikawa
  • Patent number: 10027919
    Abstract: A signal processing apparatus comprising: an analog-digital converter that converts an analog signal output from a pixel section of an image sensor to a digital signal using a plurality of reference signals having different slopes from each other; and a determination unit that determines a signal level at which the plurality of reference signals are changed based on a distribution of the converted digital signal, wherein the analog-digital converter performs the conversion using a reference signal having a steeper slope when the analog signal is equal to or greater than the signal level than when the analog signal is smaller than the signal level.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: July 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takenori Kobuse
  • Patent number: 10026004
    Abstract: A method, system, and apparatus for license plate relighting comprises collecting an image of a license plate, performing license plate recognition on the image of the license plate; calculating a confidence metric for the license plate recognition; and performing a shadow detection and relighting method if the confidence metric is below a predetermined threshold, comprising identifying a shaded region of said license plate, determining if the shaded region is actually shaded, and relighting the actually shaded region.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: July 17, 2018
    Assignee: CONDUENT BUSINESS SERVICES, LLC
    Inventors: Howard Mizes, Vladimir Kozitsky
  • Patent number: 10021273
    Abstract: In an image reading device, a controller is configured to perform: calculating a ratio between first and second reference data as evaluation data; designating a target light receiving element from a plurality of light receiving elements one by one sequentially; calculating average evaluation data of the target light receiving element by averaging the evaluation data of a second number of light receiving elements located at positions apart every predetermined distance equal to a length of a first number of consecutively arranged light receiving elements; setting an evaluation range of the target light receiving element by adding/subtracting a predetermined value to/from the average evaluation data; determining whether the evaluation data falls within the evaluation range; in response to determining that the evaluation data is out of the evaluation range, revising the second reference data of the target light receiving element; and generating correction data using the second reference data after revision.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: July 10, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takashi Matsumi
  • Patent number: 9992375
    Abstract: An image reading device includes: a sensor module having a light source and a plurality of sensors; a white reference plate; and an image processor that generates correction data to be used for shading correction and performs the shading correction on image signals, using the correction data. The light source is configured to switch between at least a first luminous intensity and a second luminous intensity lower than the first luminous intensity. The image processor acquires intermediate data by causing the plurality of sensors to acquire an image signal of the white reference plate illuminated with the second luminous intensity, generates black correction data, based on the intermediate data, and performs the shading correction, using the black correction data, so that a density unevenness, in an image, caused by interference between image signals from the plurality of sensors.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: June 5, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Ryo Matsubara, Hirotsugu Fusayasu, Katsuo Inokuchi, Tatsuya Hirota, Yuuichi Tutiya
  • Patent number: 9965695
    Abstract: A method for binarizing a grayscale document image, which first divides the document image into a plurality of sub-images and determining a type of each sub-image based on a horizontal projection profile and a density of each sub-image, the type being 1: text only, 2: graphics only, 3: photo only, 4: text and graphics, 5: text and photo, 6: graphics and photo, or 7: text and graphics and photo. Then a selected one of first to seventh binarization processes is applied to binarize each sub-image based on its type to generate a binary sub-image. All binary sub-images are then combine to generate a binary image of the grayscale document image. Of the first to seventh binarization processes respectively applied to the first to seventh types of sub-images, at least those for the first, second, third, fifth, sixth and seventh type are different from each other.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: May 8, 2018
    Assignee: KONICA MINOLTA LABORATORY U.S.A., INC.
    Inventor: Wei Ming
  • Patent number: 9948815
    Abstract: There is provided a control method for an image reading apparatus including a document conveyance unit configured to convey a document, a first reading unit configured to read a first surface of the document conveyed by the document conveyance unit, and a second reading unit configured to read a second surface of the document conveyed by the document conveyance unit, includes setting a two-sided reading mode for reading the first surface and the second surface of the document, and starting initial adjustment operation of the second reading unit in response to setting of the two-sided reading mode.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: April 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Junichi Mori
  • Patent number: 9939770
    Abstract: An image reading apparatus includes a first scanner provided in a housing, a conveyance unit, and a first calibration member. The conveyance unit is provided with a separation unit which separates the first calibration member upward from the first scanner. When the first calibration member is separated, the separation unit releases connection between the conveyance unit and the housing.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: April 10, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Tianzi Xu
  • Patent number: 9930212
    Abstract: An image reading device has an image processor that generates correction data to be used for shading correction and performs the shading correction using the correction data. The image processor generates intermediate data with a predetermined density level, generates intermediate data in different positions in the sub-scanning direction based on image signals of a first reference plate and a second reference plate disposed in the different positions, generates first and second black correction data based on the respective intermediate data, generates black correction data according to the sub-scanning direction based on both the black correction data, and performs the shading correction using the black correction data in the respective positions in the sub-scanning direction.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: March 27, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hirotsugu Fusayasu, Ryo Matsubara, Katsuo Inokuchi, Tatsuya Hirota, Yuuichi Tutiya
  • Patent number: 9917982
    Abstract: An image reading apparatus includes: a sensor module which includes a light source and sensors; a reference member for creating black correction data and white correction data; and an image processor. The image processor corrects uneven density of an image resulting from interference of image signals from the sensors, by performing, on the image signals obtained by the sensors, shading correction using black correction data and white correction data. The image processor obtains causes the sensors to obtain image signals of the reference member, and creates the white correction data based on white data, and the black correction data based on intermediate data. At least one of when creating the white correction data and when creating the black correction data, the image processor causes the sensors to obtain image signals of the reference member a plurality of times.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 13, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Katsuo Inokuchi, Hirotsugu Fusayasu, Ryo Matsubara, Tatsuya Hirota, Yuuichi Tutiya
  • Patent number: 9860394
    Abstract: An image reading apparatus includes an image capturing module, a reference member, a light source for emitting light to the reference member, a foreign object determining module for determining whether or not a foreign object appears in a specific image, and a position determining module for determining whether the foreign object exists on the image capturing module side or on the reference member side, based on an absolute value of a difference between a gradation value in a region included in two images and corresponding to a region where the foreign object appears when the foreign object appears in the specific image. One image is an image of the reference member captured under illumination of light with a first light quantity from the light source, and other image is an image of the reference member captured under illumination of light with a second light quantity from the light source.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: January 2, 2018
    Assignee: PFU LIMITED
    Inventor: Shingo Kanaya
  • Patent number: 9854129
    Abstract: A scheduler of an image processing apparatus allocates processing of control programs of the image processing apparatus to a plurality of cores when it is determined that a processor is mounted to a peripheral unit. The scheduler allocates a control program of the peripheral unit and a program related to a control program for the peripheral unit among the control programs of the image processing apparatus to at least one core among the plurality of cores and allocates remaining control programs among the control programs of the image processing apparatus to remaining cores among the plurality of cores when it is determined that a processor is not mounted to the peripheral unit.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: December 26, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazuto Tanaka, Minoru Yaguchi
  • Patent number: 9778458
    Abstract: The present application discloses methods and systems for calibrating a scanning system. In one embodiment, the calibration method determines a dark level of at least one pixel, determines a maximum white level for at least one pixel and adjusts the current of an illumination source based upon an output of an analog to digital converter. In another embodiment, the scanning system has a circuit for dynamically adjusting the output of an illumination source. The circuit has a pulse width modulated signal generator for generating a pulse width modulated signal and a driver for receiving the pulse width modulated signal and causing current to the illumination source to be modulated based on the pulse width modulated signal.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: October 3, 2017
    Assignee: Xerox Corporation
    Inventor: Mike Wilsher
  • Patent number: 9712752
    Abstract: There is provided an image processing device, includes: a first display image generation section that generates a first display image; a second display image generation section that generates a second display image for use in focus-checking; an acquisition section that acquires color data of the first display image; a determination section that, based on the color data, determines as a display color for the second display image a color with different color characteristics from color characteristics of the first display image; and a display controller that displays on a display section the first display image generated by the first display image generation section, and displays on the display section the second display image generated by the second display image generation section within a display region of the first display image.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: July 18, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Katsutoshi Izawa
  • Patent number: 9672391
    Abstract: An information medium reading device may include a magnetic head to read magnetic datum and output an analog magnetic signal; an image sensor to take a photo of image datum and output an analog image signal; an analog switch unit to select one of the analog magnetic signal and the analog image signal and output the selected one; an analog front-end unit having an analog/digital (A/D) conversion function for converting an analog signal to a digital signal, while using a voltage according to a black reference voltage at the time of image reading, as a bottom voltage, within a predetermined converted voltage range; a level adjustment unit to make a level adjustment; and a timing control unit. The analog magnetic signal may be input into the analog front-end unit, and an A/D conversion may be carried out for converting an analog signal to a digital signal.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: June 6, 2017
    Assignee: NIDEC SANKYO CORPORATION
    Inventor: Takato Tokunaga
  • Patent number: 9635210
    Abstract: An image reading apparatus includes a reading circuit, a white reference member, a control circuit, a memory circuit, and a processing circuit. The control circuit controls the reading circuit to: cause a light source to irradiate the white reference member with lights of a plurality of colors and cause a light receiving unit to receive the reflected lights. The processing circuit performs a process to identify abnormal data included in white reference data stored in the memory circuit. The processing circuit identifies information on the abnormal data in a light of an abnormal-data detected color among the plurality of colors. The processing circuit identifies the abnormal data in lights of other colors excluding the abnormal-data detected color among the plurality of colors based on the information on the abnormal data. The information is identified for the light of the abnormal-data detected color.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: April 25, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yasuyuki Horiguchi
  • Patent number: 9602686
    Abstract: A display device includes a display section having a display surface, a display control section, and a touch panel. The display control section is configured to causes the display section to display a first display region and a first operating region. The touch panel is configured to detect a touch point in touch with the display surface of the display section. A page selected from a plurality of pages is displayed in the first display region. The first operating region has a size corresponding to the number of pages from the page displayed in the first display region to an end page of the pages. The display control section updates the page displayed in the first display region according to the number of to-be-updated pages determined based on a start point to an end point of the touch point within the first operating region.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: March 21, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takuya Tsuji
  • Patent number: 9596372
    Abstract: An image processing apparatus comprises an input interface, a light source unit, a reading unit and a control unit. The input interface receives an input reading condition. The light source unit comprises a plurality of light sources which emit lights of different wavelengths. The reading unit reads an image on a sheet irradiated by the light of the light source unit. The control unit separately controls the quantity of the light emitted from each light source according to the reading condition input from the input interface.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: March 14, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Hirokazu Shoda
  • Patent number: 9591162
    Abstract: An image reading apparatus includes a document feeder; a platen; an image reader configured to read the document, fed by the document feeder, through the platen; a memory; and a controller. The controller causes the image reader to read a reference plate at a predetermined reading position to generate read data, and detecting whether the read data has an abnormality; when the read data has the abnormality, stores a detection position; sets a reading position of the image reader in the sub-scanning direction to a set position spaced by a predetermined range or more from the detection position; when instruction to start reading is received, moves the image reader under standby at a standby position to arrange the image reader at the set position; and reads the document, fed by the document feeder, by the image reader.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: March 7, 2017
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Shinya Sahara
  • Patent number: 9550367
    Abstract: A liquid consuming apparatus includes a liquid container, a detector, and a controller. The liquid container includes a movable member, and the movable member includes a detection portion. The detector is configured to output a detection signal based on the presence or absence of the detection portion in a detection position. The controller is configured to measure, based on the detection signal output from the detector, a physical quantity, based on which a velocity of the detection portion can be specified, and is configured to determine whether the physical quantity is within a threshold range.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: January 24, 2017
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Hiroto Sugahara, Kenta Hayashida, Taro Nagano, Ayako Ohishi, Hirofumi Kondo, Suguru Tomoguchi
  • Patent number: 9491321
    Abstract: An image reading apparatus that makes it possible to reduce the influences of dirt on a white reference chart itself, stripes caused by dust, and the like, and thereby generate accurate data for shading correction. An image processor performs shading correction on image data read by a reader unit. The read image data is compared with threshold values set for each pixel, and a pixel which is out of a range of the threshold values is determined as a singular point pixel. Data of a pixel determined as a singular point pixel is interpolated from data around the singular point pixel. Data of a pixel which is not determined as a singular point pixel is adopted as valid shading correction data. An operation controller controls the number of effective sampling lines from start to termination of sampling to be performed.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: November 8, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Morikawa
  • Patent number: 9467597
    Abstract: An image reading device reads an image of an object. The image reading device includes a white reference member and a gloss reference member. The white reference member is used for generating white reference data. The gloss reference member has a larger ratio of mirror reflected light to incident light than the white reference member.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: October 11, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masaya Yoshida
  • Patent number: 9445021
    Abstract: A method of pixel correction is disclosed. The method generally includes the steps of (A) calibrating a per-pixel correction model of a sensor at a plurality of different illumination levels, (B) generating a plurality of pixel values from the sensor in response to an optical signal and (C) generating a plurality of corrected values by applying the per-pixel correction model to the pixel values.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: September 13, 2016
    Assignee: Ambrella, Inc.
    Inventors: Elliot N. Linzer, Leslie D. Kohn
  • Patent number: 9432552
    Abstract: An image scanning apparatus, comprising: a gray reference member; a scanning unit; a signal conversion unit; a controller configured to: calculate white and black difference data of one line by subtracting first black data of one line from white data of one line; calculate a white and black difference maximum value and obtain a particular pixel position corresponding to the white and black difference maximum value; calculate light gray black difference data of one line by subtracting second black data of one line from light gray data of one line; calculate a gray white ratio by dividing the white and black difference maximum value at the particular pixel position by the light gray black difference data at the particular pixel position; and calculate reference data of one line by multiplying light gray data of one line by the gray white ratio.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: August 30, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Tetsuya Kato, Taiki Yamano, Takashi Matsumi, Shuichi Sunako
  • Patent number: 9413919
    Abstract: An image reading device includes a white reference member, a generating unit, a representative-value storage unit, a reproducing unit, and a normalizing unit. The white reference member reflects a light emitted from a light source. The generating unit generates pseudo data on the basis of the light reflected by the white reference member with respect to each pixel area. The representative-value storage unit stores therein a representative value of each pixel area of the pseudo data. The reproducing unit reproduces the pseudo data on the basis of the representative values. The normalizing unit normalizes results of photoelectric conversion of at least any of pixels on the basis of the pseudo data, thereby creating a criterion for determining the presence or absence of an original.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: August 9, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventor: Naoki Asaba
  • Patent number: 9363404
    Abstract: An image scanning apparatus is configured to obtain a greatest gray gradation value when the light source illuminates the gray reference member at a first light quantity value, obtain a gradation value of a black signal output by the signal conversion unit when the light source is powered off, calculate a first difference value, set a second light quantity value, set a correction light quantity value, obtain a second difference value by subtracting the gradation value of the black signal from the second gradation value of a white signal, calculate a shading correction value based on a ratio of the second difference value to the first difference value, control the scanning unit to scan the image on the original sheet with controlling the light source to illuminate the original sheet in accordance with the second light quantity value, and apply the shading correction in accordance with the shading correction value.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: June 7, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yuji Hori, Kentaro Sugiyama