Patents by Inventor Taiji Morishita

Taiji Morishita 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).

  • Patent number: 10839235
    Abstract: In a light control system, a captured image of a cruising direction of a vehicle is acquired, and a light source is extracted from the captured image. A probability for estimating a light source to be a vehicle light source originating from a vehicle is calculated based on light source parameters for differentiating the light source. A dark section that is darker than the periphery and is present below the light source in the captured image is extracted. The probability is set to be higher for the light source of which the dark section is extracted. The light source having a probability that is a reference value set in advance or higher is estimated to be a light source of another vehicle. When the dark section that is detected as a shadow of a vehicle is detected, the probability of the light source being a vehicle light source is set to be high.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: November 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Hironori Sato, Taiji Morishita
  • Publication number: 20180239974
    Abstract: In a light control system, a captured image of a cruising direction of a vehicle is acquired, and a light source is extracted from the captured image. A probability for estimating a light source to be a vehicle light source originating from a vehicle is calculated based on light source parameters for differentiating the light source. A dark section that is darker than the periphery and is present below the light source in the captured image is extracted. The probability is set to be higher for the light source of which the dark section is extracted. The light source having a probability that is a reference value set in advance or higher is estimated to be a light source of another vehicle. When the dark section that is detected as a shadow of a vehicle is detected, the probability of the light source being a vehicle light source is set to be high.
    Type: Application
    Filed: April 24, 2018
    Publication date: August 23, 2018
    Inventors: Hironori SATO, Taiji MORISHITA
  • Patent number: 9977974
    Abstract: In a light control system, a captured image of a cruising direction of a vehicle is acquired, and a light source is extracted from the captured image. A probability for estimating a light source to be a vehicle light source originating from a vehicle is calculated based on light source parameters for differentiating the light source. A dark section that is darker than the periphery and is present below the light source in the captured image is extracted. The probability is set to be higher for the light source of which the dark section is extracted. The light source having a probability that is a reference value set in advance or higher is estimated to be a light source of another vehicle. When the dark section that is detected as a shadow of a vehicle is detected, the probability of the light source being a vehicle light source is set to be high.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: May 22, 2018
    Assignee: DENSO CORPORATION
    Inventors: Hironori Sato, Taiji Morishita
  • Patent number: 9493108
    Abstract: An on-vehicle apparatus detects other vehicle lights from an image picked up outside the vehicle. The apparatus acquires an image around the vehicle and extracts light sources from the image. The apparatus calculates a target area probability that is a probability of a light source in a target area being different vehicle light, in accordance with a probability that light-source feature quantities at least including either of a color of light source and a shape of light source coincide with target-area feature quantities, the target area indicating a preset site that is a part of an area indicating each of the light sources. The target-area feature quantities are prepared as feature quantities of vehicle light, being correlated to the position of a target area. The apparatus outputs information that a light source having the target area probability of not less than a preset threshold is different vehicle light.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: November 15, 2016
    Assignee: DENSO CORPORATION
    Inventors: Taiji Morishita, Hironori Sato, Kentarou Shiota
  • Patent number: 9372112
    Abstract: A driving environment detection device acquires a captured image of the direction the host vehicle is travelling in, and from the captured image, extracts parameters relating to brightness of a road surface for a road driven by the host vehicle. Then, on the basis of the parameters, the driving environment of the vehicle is estimated. By way of such a light control system, it is possible to more accurately detect ambient brightness by estimating the driving environment in accordance with the parameters related to the brightness of the road surface. Therefore, it is possible to accurately detect the driving environment.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: June 21, 2016
    Assignee: DENSO CORPORATION
    Inventors: Taiji Morishita, Hironori Sato
  • Publication number: 20160012307
    Abstract: In a road sign recognition system, a high luminance region indicating a region with a luminance higher than a predetermined reference luminance in the captured image is extracted (S120, S220), and a vehicle light source that represents a light source derived from the vehicle in the captured image is extracted (S130, S230). Then, a region that matches the vehicle light source in the high luminance region is excluded (S140, S240), and another region excluding the region that matches the vehicle light source in the high luminance region is set as a target region for recognizing the road sign (S150, S250), and the road sign is recognized in the target region. As a result, it is possible to narrow the region of performing the process of recognizing the road sign, thus it is possible to reduce the process load during recognizing the road sign.
    Type: Application
    Filed: January 24, 2014
    Publication date: January 14, 2016
    Inventor: Taiji Morishita
  • Publication number: 20150131086
    Abstract: A driving environment detection device acquires a captured image of the direction the host vehicle is travelling in, and from the captured image, extracts parameters relating to brightness of a road surface for a road driven by the host vehicle. Then, on the basis of the parameters, the driving environment of the vehicle is estimated. By way of such a light control system, it is possible to more accurately detect ambient brightness by estimating the driving environment in accordance with the parameters related to the brightness of the road surface. Therefore, it is possible to accurately detect the driving environment.
    Type: Application
    Filed: May 14, 2013
    Publication date: May 14, 2015
    Inventors: Taiji Morishita, Hironori Sato
  • Publication number: 20150098612
    Abstract: In a light control system, a captured image of a cruising direction of a vehicle is acquired, and a light source is extracted from the captured image. A probability for estimating a light source to be a vehicle light source originating from a vehicle is calculated based on light source parameters for differentiating the light source. A dark section that is darker than the periphery and is present below the light source in the captured image is extracted. The probability is set to be higher for the light source of which the dark section is extracted. The light source having a probability that is a reference value set in advance or higher is estimated to be a light source of another vehicle. When the dark section that is detected as a shadow of a vehicle is detected, the probability of the light source being a vehicle light source is set to be high.
    Type: Application
    Filed: May 8, 2013
    Publication date: April 9, 2015
    Applicant: DENSO CORPORATION
    Inventors: Hironori Sato, Taiji Morishita
  • Publication number: 20140226349
    Abstract: An on-vehicle apparatus detects other vehicle lights from an image picked up outside the vehicle. The apparatus acquires an image around the vehicle and extracts light sources from the image. The apparatus calculates a target area probability that is a probability of a light source in a target area being different vehicle light, in accordance with a probability that light-source feature quantities at least including either of a color of light source and a shape of light source coincide with target-area feature quantities, the target area indicating a preset site that is a part of an area indicating each of the light sources. The target-area feature quantities are prepared as feature quantities of vehicle light, being correlated to the position of a target area. The apparatus outputs information that a light source having the target area probability of not less than a preset threshold is different vehicle light.
    Type: Application
    Filed: September 19, 2012
    Publication date: August 14, 2014
    Applicant: DENSO CORPORATION
    Inventors: Taiji Morishita, Hironori Sato, Kentarou Shiota
  • Patent number: 8569985
    Abstract: In a wiper control apparatus, a water drop detector outputs an output signal in accordance with water drops adhering to a windshield of a vehicle. When a traveling determination portion determines that the vehicle is traveling, a first level setting portion sets a sensitivity for detecting the output signal to a first sensitivity. When the traveling determination portion determines the vehicle is not traveling, a second level setting portion sets the sensitivity for detecting the output signal to a second sensitivity that is larger than the first sensitivity. A water drop adhesion determination portion determines that water drops adhere to the windshield when a determination waiting time elapses in a state where detection of the output signal continues. A driving control portion controls a wiper driving portion to drive the wiper when the water drop adhesion determination portion determines that water drops adhere to the windshield.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: October 29, 2013
    Assignees: Denso Corporation, Mazda Motor Corporation
    Inventors: Taiji Morishita, Yasuhiro Takabe, Hiroshi Miyazaki, Katsunori Tonomyo
  • Publication number: 20120062163
    Abstract: In a wiper control apparatus, a water drop detector outputs an output signal in accordance with water drops adhering to a windshield of a vehicle. When a traveling determination portion determines that the vehicle is traveling, a first level setting portion sets a sensitivity for detecting the output signal to a first sensitivity. When the traveling determination portion determines the vehicle is not traveling, a second level setting portion sets the sensitivity for detecting the output signal to a second sensitivity that is larger than the first sensitivity. A water drop adhesion determination portion determines that water drops adhere to the windshield when a determination waiting time elapses in a state where detection of the output signal continues. A driving control portion controls a wiper driving portion to drive the wiper when the water drop adhesion determination portion determines that water drops adhere to the windshield.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 15, 2012
    Applicants: MAZDA MOTOR CORPORATION, DENSO CORPORATION
    Inventors: Taiji MORISHITA, Yasuhiro Takabe, Hiroshi Miyazaki, Katsunori Tonomyo
  • Patent number: 7733049
    Abstract: A change computing arrangement computing an amount of change in a measured value of a measurement signal of a raindrop sensor in a raindrop quantity sensing execution time period that is a time period, during which a wiper blade moves outside of a sensing range of the raindrop sensor. A difference computing arrangement computes a difference between a predetermined reference value and an initial measured value of the measurement signal of the raindrop sensor. A determining arrangement determines the quantity of raindrops on the windshield based on the amount of change, which is computed by the change computing arrangement, and the difference, which is computed by the difference computing arrangement.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: June 8, 2010
    Assignee: Denso Corporation
    Inventors: Satoru Hiramoto, Taiji Morishita
  • Patent number: 7710057
    Abstract: A raindrop sensor outputs a measurement signal, which corresponds to a quantity of raindrops in a predetermined sensing range in a wiping range on a windshield. A prohibited time period setting arrangement sets a time period, during which a wiper blade is predicted to pass through the predetermined sensing range, as a raindrop quantity sensing prohibited time period based on an elapsed time from a time point of supplying a drive command signal to a wiper motor, which drives the wiper blade. The determining arrangement determines the quantity of raindrops on the windshield based on the measurement signal outputted from the raindrop sensor in a raindrop quantity sensing execution time period, which is outside of the raindrop quantity sensing prohibited time period.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: May 4, 2010
    Assignee: Denso Corporation
    Inventors: Taketoshi Yoshigoe, Taiji Morishita
  • Patent number: 7429745
    Abstract: A sensor device for detecting wetting on a windshield includes a light emission element for emitting a light, a first light reception element for receiving the light in a first light path that includes reflective redirection by the windshield, and a second light reception element for receiving the light in a second light path that does not include reflective redirection by the windshield. The sensor device uses a ratio of the amount of the received light by the first light reception element and the amount of the received light by the second light reception element to determine wetting on the windshield.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: September 30, 2008
    Assignee: Denso Corporation
    Inventors: Taketoshi Yoshigoe, Junichi Ishikawa, Taiji Morishita
  • Patent number: 7385216
    Abstract: A sensor device for detecting wetting on a windshield includes a light emission element for emitting a light, a first light reception element for receiving the light in a first light path that includes reflective redirection by the windshield, and a second light reception element for receiving the light in a second light path that does not include reflective redirection by the windshield. The sensor device uses a ratio of the amount of the received light by the first light reception element and the amount of the received light by the second light reception element to determine wetting on the windshield.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: June 10, 2008
    Assignee: Denso Corporation
    Inventors: Taketoshi Yoshigoe, Junichi Ishikawa, Taiji Morishita
  • Patent number: 7356395
    Abstract: An inter-device communication system for a wiper control apparatus that includes a rain detection device and a wiper driving device includes communication circuits having a transmission line for unidirectionally sending a rain detection signal to the wiper driving device, a transmission circuit arranged in the wiper driving device for short-circuiting a potential of the signal unidirectionally sent through the transmission line, and a recognition circuit arranged in the rain detection device for recognizing transmitting information sent in an opposite direction to a direction of the unidirectional transmission, i.e., from the wiper driving device to the rain detection device based on the short-circuited signal.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: April 8, 2008
    Assignee: Denso Corporation
    Inventor: Taiji Morishita
  • Publication number: 20080030159
    Abstract: A change computing arrangement computing an amount of change in a measured value of a measurement signal of a raindrop sensor in a raindrop quantity sensing execution time period that is a time period, during which a wiper blade moves outside of a sensing range of the raindrop sensor. A difference computing arrangement computes a difference between a predetermined reference value and an initial measured value of the measurement signal of the raindrop sensor. A determining arrangement determines the quantity of raindrops on the windshield based on the amount of change, which is computed by the change computing arrangement, and the difference, which is computed by the difference computing arrangement.
    Type: Application
    Filed: July 19, 2007
    Publication date: February 7, 2008
    Applicant: DENSO CORPORATION
    Inventors: Satoru Hiramoto, Taiji Morishita
  • Publication number: 20080028563
    Abstract: A a raindrop sensor outputs a measurement signal, which corresponds to a quantity of raindrops in a predetermined sensing range in a wiping range on a windshield. A prohibited time period setting arrangement sets a time period, during which a wiper blade is predicted to pass through the predetermined sensing range, as a raindrop quantity sensing prohibited time period based on an elapsed time from a time point of supplying a drive command signal to a wiper motor, which drives the wiper blade. The determining arrangement determines the quantity of raindrops on the windshield based on the measurement signal outputted from the raindrop sensor in a raindrop quantity sensing execution time period, which is outside of the raindrop quantity sensing prohibited time period.
    Type: Application
    Filed: August 6, 2007
    Publication date: February 7, 2008
    Applicant: DENSO CORPORATION
    Inventors: Taketoshi Yoshigoe, Taiji Morishita
  • Patent number: 7235944
    Abstract: A wiper control system for detecting an amount of raindrops landed on a windshield of a vehicle and driving a wipe operation of a wiper to wipe the landed raindrops. The wiper control system includes raindrop sensing means, average landed raindrop amount calculation means, vehicle acceleration sensing means, and wipe operation mode selection means. The raindrop sensing means is capable of detecting the amount of landed raindrops for each of a plurality of wipe cycles of the wiper. The average landed raindrop amount calculation means calculates an average value of the amount of landed raindrops for the plurality of wipe cycles. The vehicle acceleration sensing means detects an acceleration of the vehicle. The wipe operation mode selection means selects a wipe operation mode based on the acceleration of the vehicle and any one of the amount of landed raindrops and the average amount of landed raindrops.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: June 26, 2007
    Assignee: Denso Corporation
    Inventor: Taiji Morishita
  • Publication number: 20070034785
    Abstract: A sensor device for detecting wetting on a windshield includes a light emission element for emitting a light, a first light reception element for receiving the light in a first light path that includes reflective redirection by the windshield, and a second light reception element for receiving the light in a second light path that does not include reflective redirection by the windshield. The sensor device uses a ratio of the amount of the received light by the first light reception element and the amount of the received light by the second light reception element to determine wetting on the windshield.
    Type: Application
    Filed: October 20, 2006
    Publication date: February 15, 2007
    Applicant: Denso Corporation
    Inventors: Taketoshi Yoshigoe, Junichi Ishikawa, Taiji Morishita