Patents by Inventor Hisashi Ishikawa

Hisashi Ishikawa 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).

  • Publication number: 20200184289
    Abstract: Provided is quantization processing that can reduce color development defect due to dot overlapping and can output an image with reduced granularity when the image is printed by using multiple kinds of colorants. To this end, dot arrangement information for a colorant for which dot arrangement is already determined among multiple kinds of colorants is acquired for a predetermined region of the image, and an evaluation value of each pixel included in the predetermined region is derived based on the arrangement information. In addition, for the predetermined region, a target value for a predetermined colorant for which dot arrangement is yet to be determined is derived based on the image. Then, whether or not to arrange a dot of the predetermined colorant in the predetermined region is determined based on the target value and the evaluation value.
    Type: Application
    Filed: December 5, 2019
    Publication date: June 11, 2020
    Inventors: Naoya Takesue, Hisashi Ishikawa, Akitoshi Yamada
  • Publication number: 20200171820
    Abstract: The image processing apparatus of the present invention includes: an image data acquisition unit configured to acquire image data; a generation unit configured to generate an ejection pattern of ink droplets from the image data, which are ejected for forming dots from a plurality of nozzles of an image forming apparatus; a characteristic acquisition unit configured to acquire an ejection characteristic of ink droplets of the image forming apparatus; and a pattern change processing unit configured to change the ejection pattern based on the ejection characteristic and the ejection pattern, and the pattern change processing unit repeatedly performs, in a case where a gap occurs between dots that should be formed so as to contact each other by the image forming apparatus, the ejection pattern change until the gap is eliminated.
    Type: Application
    Filed: November 27, 2019
    Publication date: June 4, 2020
    Inventors: Naoya Takesue, Masashi Oya, Hisashi Ishikawa
  • Patent number: 10671006
    Abstract: The image processing apparatus of the present invention includes: an edge determination unit configured to detect an edge pixel to which a white pixel and a black pixel are adjacent in a first direction in an image in which each pixel is represented as a white pixel or a black pixel; a first detection unit configured to detect a number of consecutive pixels up to the edge pixel in the first direction in the image; a second detection unit configured to detect a number of consecutive pixels whose number of consecutive pixels in the first direction is larger than a first threshold in a second direction perpendicular to the first direction in the image; and a type determination unit configured to determine a type of the edge pixel based on detection results by the first detection unit and detection results by the second detection unit.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: June 2, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryosuke Otani, Yoichi Takikawa, Hisashi Ishikawa
  • Publication number: 20200156386
    Abstract: Density unevenness accompanying a variation in an ejection characteristic of each nozzle is reduced without worsening granularity of an image. To this end, an image processing apparatus generates first corrected data by correcting image data by using a first correction table common to the plurality of nozzles. Further, the image processing apparatus generates second corrected data by correcting the image data by using a second correction table for each of the plurality of nozzles. Furthermore, the image processing apparatus generates first quantized data by quantizing the first corrected data and generates second quantized data by quantizing the second corrected data. After that, the image processing apparatus generates N-valued print data based on the first quantized data and the second quantized data.
    Type: Application
    Filed: November 14, 2019
    Publication date: May 21, 2020
    Inventors: Ryosuke Otani, Hisashi Ishikawa
  • Patent number: 10647330
    Abstract: If an automated drive release request to release the automated drive mode and switch to the manual drive mode is made while the vehicle is travelling in an automated drive mode, a traveling control unit performs control that gradually shifts a vehicle driving force from the vehicle driving force in the automated mode to the vehicle driving force requested by the driver in the manual drive mode.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 12, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kentaro Arai, Masayuki Sadakiyo, Hisashi Ishikawa, Takashi Adachi, Tomoyuki Noguchi
  • Patent number: 10650294
    Abstract: An image processing apparatus includes a target value calculation unit configured to calculate a target value to be output in a predetermined region in input image data based on pixel values of pixels included in the region, a distribution order determination unit configured to determine a distribution order of output values for distributing output values corresponding to the target value in the region based on a pixel value of each pixel included in the region and a threshold value in the threshold matrix corresponding to the pixel, and an output value determination unit configured to determine an output value of each pixel included in the region by allocating the target value to at least one pixel included in the region in the distribution order.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: May 12, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shigeo Kodama, Hisashi Ishikawa
  • Publication number: 20200079102
    Abstract: An image processing apparatus generates dot data for printing an image on a printing medium by using dots of different sizes formed by a plurality of nozzles ejecting ink. The image processing apparatus includes a first acquisition unit that acquires dot data specifying printing or non-printing of each of the dots of a plurality of sizes for each pixel, a specification unit that specifies a dot having a strong possibility of being pulled by a dot having landed earlier on the printing medium of dots in the dot data, and a correction unit that corrects a dot specified by the specification unit in the dot data. The image processing apparatus can output an image whose banding is unlikely to be recognized by suppressing image defect due to a change of dots accompanying liquid droplet interference.
    Type: Application
    Filed: September 10, 2019
    Publication date: March 12, 2020
    Inventors: Takashi Ochiai, Hisashi Ishikawa
  • Publication number: 20200072299
    Abstract: A hydraulic circuit includes a first shift valve and a second shift valve that are provided in series between a source oil path through which oil whose pressure has been regulated flows and a first clutch oil path and a second clutch oil path. The first shift valve is selectively switchable between a first switching state where a first communicating oil path and the first clutch oil path are communicated and a second switching state where a second communicating oil path and the second clutch oil path are communicated, and the second shift valve is selectively switchable between a third switching state where the source oil path and the first communicating oil path are communicated and a fourth switching state where the source oil path and the second communicating oil path are communicated.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Hisashi Ishikawa, Yuji Okazaki, Shigeji Nakano, Hideaki Iwashita, Yuya Shimota, Noriyuki Yagi, Yoshihiro Sato
  • Publication number: 20200074251
    Abstract: To generate a dot pattern whose deterioration of a feeling of granularity, density unevenness, and streaks are unlikely to be recognized visually by more effectively suppressing a change of an overlap of ink droplets on a printing medium. Halftone image data representing a dot pattern of each of two or more kinds of dot different in density reproduction is acquired. Then, in a case where there is a possibility that the contact state between dots changes due to a landed-dot shift of ink in a plurality of specific dots on a condition that dots are formed in accordance with a dot pattern in the halftone image data, the plurality of specific dots is replaced with dots of another kind whose number is less than or equal to that of the plurality of specific dots.
    Type: Application
    Filed: August 27, 2019
    Publication date: March 5, 2020
    Inventors: Naoya Takesue, Hisashi Ishikawa
  • Publication number: 20200045208
    Abstract: An image processing apparatus performs image processing to print a color materials of a first color and a second color. When a sum of a first gradation data for the first color and a second gradation data for the second color is equal to or smaller than the maximum value of thresholds of a first threshold matrix, a generation unit generates a second quantization data for the second color based on a result of comparing the second gradation data with a second threshold. When the sum is greater than the maximum value, the generation unit generates third gradation data by subtracting the maximum value from the sum and generates the second quantization data based on a result of comparing the third gradation data with the first threshold or a result of comparing a difference between the second gradation data and the third gradation data with the second threshold.
    Type: Application
    Filed: July 23, 2019
    Publication date: February 6, 2020
    Inventors: Tsukasa Doi, Hirokazu Tanaka, Hisashi Ishikawa, Shoei Moribe, Yusuke Yamamoto, Shigeo Kodama, Yuta Ikeshima
  • Publication number: 20200042840
    Abstract: When a sum of a first gradation data for a first color and a second gradation data for a second color is greater than the maximum value of thresholds of a first threshold matrix, a generation unit generates a first overlapping gradation data and second overlapping gradation data by dividing a value obtained by subtracting the maximum value from the sum. Further, the generation unit generates a first quantization data based on a result of comparing the first overlapping gradation data with the second threshold or a result of comparing a difference between the first gradation data and the first overlapping gradation data with the first threshold, and generates a second quantization data based on a result of comparing the second overlapping gradation data with the first threshold or a result of comparing a difference between the second gradation data and the second overlapping gradation data with the second threshold.
    Type: Application
    Filed: July 23, 2019
    Publication date: February 6, 2020
    Inventors: Tsukasa Doi, Hirokazu Tanaka, Hisashi Ishikawa, Shoei Moribe, Yusuke Yamamoto, Shigeo Kodama, Yuta Ikeshima
  • Patent number: 10545446
    Abstract: The present invention performs inplane uneven density correction that suppresses a number of tone correction properties and has few correction residuals. Accordingly, a holding unit of an apparatus of the present invention holds a plurality of tone correction properties respectively corresponding to a plurality of spot diameters that divide a range of a spot diameter of a light exposed on a surface of a photoreceptor by a predetermined interval. In addition a setting unit sets a tone correction property selected from the plurality of tone correction properties based on a spot diameter on the photoreceptor for a pixel corresponding to pixel data C. A correction unit corrects the pixel data C based on the set tone correction property, to generate tone correction data Cc.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoichi Takikawa, Ryosuke Otani, Hidenori Kanazawa, Go Araki, Hisashi Ishikawa
  • Patent number: 10534987
    Abstract: An image processing apparatus includes a target value calculation unit configured to calculate a target value to be output in a predetermined region in input image data based on pixel values of pixels included in the region, a distribution order determination unit configured to determine a distribution order of output values for distributing output values corresponding to the target value in the region based on a pixel value of each pixel included in the region and a threshold value in the threshold matrix corresponding to the pixel, and an output value determination unit configured to determine an output value of each pixel included in the region by allocating the target value to at least one pixel included in the region in the distribution order.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: January 14, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shigeo Kodama, Hisashi Ishikawa
  • Publication number: 20190369623
    Abstract: A self-driving vehicle including an actuator used for traveling, a communication unit receiving disaster information and a microprocessor. The microprocessor is configured to perform controlling the actuator so as to evacuate the self-driving vehicle to a predetermined place when the disaster information is received by the communication unit, the actuator includes a shift actuator changing a speed ratio of a transmission. The microprocessor is configured to perform the controlling including controlling the shift actuator so as to increase the speed ratio of the transmission when the disaster information is received by the communication unit.
    Type: Application
    Filed: May 10, 2019
    Publication date: December 5, 2019
    Inventors: Masayuki Sadakiyo, Hisashi Ishikawa, Tomoyuki Noguchi, Takashi Adachi
  • Publication number: 20190364252
    Abstract: An information processing apparatus includes an acquisition unit configured to acquire image data representing an image generated by projecting a first image on a part of a second image using at least one projection apparatus and a control unit configured to control a presentation unit to present, to a user, an area in the second image where the first image is to be projected by the at least one projection apparatus based on the image.
    Type: Application
    Filed: May 14, 2019
    Publication date: November 28, 2019
    Inventors: Hideki Kubo, Hisashi Ishikawa
  • Publication number: 20190362202
    Abstract: To make it possible to appropriately reproduce a desired color in a case where it is desired to change hue of a specific area on a reproduced image obtained by projecting a projection image onto printed matter in an overlapping manner. In an image processing apparatus, a print image for outputting printed matter by a printer onto which a moving image in which color of an object changes in a time series is projected in an overlapping manner is generated. The image processing apparatus acquires an image at least including the object whose color changes. Then, the image processing apparatus generates the print image by performing saturation reduction processing for an area of the object whose color changes in the acquired image.
    Type: Application
    Filed: May 21, 2019
    Publication date: November 28, 2019
    Inventors: Kyohei Kikuta, Hideki Kubo, Hisashi Ishikawa
  • Publication number: 20190322289
    Abstract: A control device for a vehicle capable of switching between an automated driving mode in which driving force of a vehicle having a transmission is automatically controlled and a manual driving mode in which the driving force of the vehicle is controlled on the basis of a driver's operation on the vehicle includes: an operation element to which the driver's operation is input; and a travel control unit that outputs a command value for selecting a gear range of the transmission. The travel control unit selects which of ordinary gear change control and gear change restricting control is to be performed on the basis of an operation performed on the operation element when there is an automated driving release request in which the automated driving mode is released and the automated driving mode is switched to the manual driving mode during traveling of the vehicle in the automated driving mode.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicant: Honda Motor Co.,Ltd.
    Inventors: Takashi ADACHI, Kentaro ARAI, Tomoyuki NOGUCHI, Masayuki SADAKIYO, Hisashi ISHIKAWA
  • Publication number: 20190322308
    Abstract: A control device for a vehicle capable of operating in an automated driving mode for automatically controlling at least the accelerating/decelerating control of the steering control and the accelerating/decelerating control of a vehicle includes: a route information acquisition unit; and an automated driving control unit that decides an action plan on a basis of map information, the action plan includes a target vehicle speed sequence that defines a target vehicle speed at the respective predetermined points at least on a road along which the vehicle will travel next, and the automated driving control unit calculates requested braking force that is braking force for decelerating the vehicle to target vehicle speed when the target vehicle speed is achieved by deceleration, calculates a predicted temperature of a brake device when the requested braking force is achieved, and decides a utilization proportion of the brake device for the requested braking force.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicant: Honda Motor Co.,Ltd.
    Inventors: Takashi ADACHI, Masayuki SADAKIYO, Tomoyuki NOGUCHI, Hisashi ISHIKAWA, Kentaro ARAI
  • Publication number: 20190299979
    Abstract: An autonomous parking apparatus incorporated into a vehicle including an internal combustion engine, a torque converter, a transmission, a detector detecting a creep torque acting on an axle, and a microprocessor. The microprocessor is configured to perform instructing a self-parking of the vehicle, determining whether it is necessary to perform a creep torque reduction control based on a creep torque detected when the self-parking is instructed, and controlling the transmission in accordance with a determination result in the determining. When it is determined that it is necessary to perform the creep torque reduction control, the microprocessor is configured to control the transmission so as to increase engaging force of engagement elements of the transmission or change speed stage of the transmission to high speed side than when it is determined that it is unnecessary to perform the creep torque reduction control.
    Type: Application
    Filed: March 20, 2019
    Publication date: October 3, 2019
    Inventors: Masayuki Sadakiyo, Hisashi Ishikawa, Tomoyuki Noguchi, Takashi Adachi
  • Patent number: 10427403
    Abstract: Regarding an image forming apparatus for printing an input image and including a print head having a head sensor configured to sense information from the input image printed on a print medium, there is a method of determining a head sensor position parameter in the image forming apparatus. The method includes printing a first swath of the input image on the print medium and determining the head sensor position parameter by performing a sub-method. The sub-method includes capturing, via the head sensor, a target image from the printed first swath, comparing the target image to a reference image for the first swath based upon the input image, and determining the head sensor position parameter based on a relative shift between the target image and the reference image.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: October 1, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jumpei Ashida, Hisashi Ishikawa