Patents by Inventor Ja-Hoo Koo
Ja-Hoo Koo 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: 11341754Abstract: Provided are a calibration method and a calibration apparatus for steering assist or autonomous driving of a vehicle in which lines on a road are detected from an image and coordinates of the lines in an image domain are transformed into coordinates in a world domain to update homography matrix that represents a transformation relationship between the image domain and the world domain, and controlling the vehicle traveling on the road based on the lines.Type: GrantFiled: October 22, 2019Date of Patent: May 24, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Won-ju Lee, Ja-hoo Koo, Se-ho Shin, Dong-wook Lee
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Patent number: 11200432Abstract: Provided are a method and apparatus for determining driving information. The apparatus generates a probability map corresponding to a target object to be detected from a driving image, extracts representative points from a candidate region of the target object detected from the driving image, extracts some of the representative points based on the probability map, calculates a confidence value for the candidate region of the target object based on the extracted some representative points, and determines driving information of the vehicle based on the confidence value.Type: GrantFiled: July 11, 2019Date of Patent: December 14, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yoon-Suk Hyun, Cheol-Hun Jang, Ja-hoo Koo, Dae-Hyun Ji
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Patent number: 11138750Abstract: A distance estimating method and apparatus are provided. The method includes acquiring a real target length corresponding to target points of an object, calculating, from an input image, an image target length corresponding to the real target length, and estimating a distance from a distance estimating apparatus to the object, based on the real target length, the image target length, and a focal length thereof.Type: GrantFiled: October 2, 2019Date of Patent: October 5, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-woo Lee, Ja-hoo Koo, Won-ju Lee, Yoon-suk Hyun
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Patent number: 11062153Abstract: Provided are an apparatus and a method for converting an image. The apparatus includes an image sensor configured to obtain an image of a road, and a processor. The processor is configured to segment an input image into a plurality of region images, determine a vanishing point corresponding to each of the plurality of region images, obtain a translation relation for converting two-dimensional (2D) coordinates of a point in a region image among the plurality of region images into three-dimensional (3D) coordinates, based on a vanishing point of the region image, and generate road profile data based on translation relations of the plurality of region images.Type: GrantFiled: August 5, 2019Date of Patent: July 13, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-woo Lee, Yoon-suk Hyun, Ja-hoo Koo, Cheol-hun Jang, Dae-hyun Ji
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Publication number: 20200125860Abstract: Provided are a method and apparatus for determining driving information. The apparatus generates a probability map corresponding to a target object to be detected from a driving image, extracts representative points from a candidate region of the target object detected from the driving image, extracts some of the representative points based on the probability map, calculates a confidence value for the candidate region of the target object based on the extracted some representative points, and determines driving information of the vehicle based on the confidence value.Type: ApplicationFiled: July 11, 2019Publication date: April 23, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yoon-suk HYUN, Cheol-hun JANG, Ja-hoo KOO, Dae-hyun JI
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Publication number: 20200125862Abstract: Provided are a calibration method and a calibration apparatus for steering assist or autonomous driving of a vehicle in which lines on a road are detected from an image and coordinates of the lines in an image domain are transformed into coordinates in a world domain to update homography matrix that represents a transformation relationship between the image domain and the world domain, and controlling the vehicle traveling on the road based on the lines.Type: ApplicationFiled: October 22, 2019Publication date: April 23, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Won-ju LEE, Ja-hoo KOO, Se-ho SHIN, Dong-wook LEE
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Publication number: 20200118283Abstract: A distance estimating method and apparatus are provided.Type: ApplicationFiled: October 2, 2019Publication date: April 16, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-woo LEE, Ja-hoo KOO, Won-ju LEE, Yoon-suk HYUN
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Publication number: 20200117920Abstract: Provided are an apparatus and a method for converting an image. The apparatus includes an image sensor configured to obtain an image of a road, and a processor. The processor is configured to segment an input image into a plurality of region images, determine a vanishing point corresponding to each of the plurality of region images, obtain a translation relation for converting two-dimensional (2D) coordinates of a point in a region image among the plurality of region images into three-dimensional (3D) coordinates, based on a vanishing point of the region image, and generate road profile data based on translation relations of the plurality of region images.Type: ApplicationFiled: August 5, 2019Publication date: April 16, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-woo LEE, Yoon-suk Hyun, Ja-hoo Koo, Cheol-hun Jang, Dae-Hyun Ji
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Patent number: 10279702Abstract: A technique of diagnosing a fuel cell stack is provided. In particular, current and voltage of a fuel cell stack are measured during driving of a fuel cell vehicle and the current and voltage are sequentially stored. It is then determined based on the stored current whether the vehicle is being operated at constant current. Different factors are analyzed depending on whether the vehicle is being operated at constant current, and then it is determined whether the fuel cell stack is in a normal state. A moisture supply into the fuel cell stack is calculated if it is determined that the fuel cell stack is not in the normal state. Based on the calculated moisture supply, whether the fuel cell stack is in a dryout state is diagnosed.Type: GrantFiled: January 10, 2018Date of Patent: May 7, 2019Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Ja Hoo Koo, Sung Jin Chung, Sang Uk Kwon
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Patent number: 10052968Abstract: A system and method for diagnosing a fuel cell stack are provided. The method includes determining, by a controller, a time at which diagnosing the fuel cell stack is required based on a plurality of factors and driving a motor adjusted to a first efficiency value for a predetermined first reference time period based on the diagnosis determination. In addition, the controller is configured to drive the motor adjusted to a second efficiency value when the first reference time period has elapsed. A state of the fuel cell stack is then diagnosed based on a voltage variance of the fuel cell stack between driving the motor adjusted to the first efficiency value and second efficiency value.Type: GrantFiled: February 6, 2015Date of Patent: August 21, 2018Assignee: Hyundai Motor CompanyInventors: Sung Jin Chung, Ja Hoo Koo, Joon Yong Lee, Soon Woo Kwon
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Publication number: 20180126865Abstract: A technique of diagnosing a fuel cell stack is provided. In particular, current and voltage of a fuel cell stack are measured during driving of a fuel cell vehicle and the current and voltage are sequentially stored. It is then determined based on the stored current whether the vehicle is being operated at constant current. Different factors are analyzed depending on whether the vehicle is being operated at constant current, and then it is determined whether the fuel cell stack is in a normal state. A moisture supply into the fuel cell stack is calculated if it is determined that the fuel cell stack is not in the normal state. Based on the calculated moisture supply, whether the fuel cell stack is in a dryout state is diagnosed.Type: ApplicationFiled: January 10, 2018Publication date: May 10, 2018Inventors: Ja Hoo Koo, Sung Jin Chung, Sang Uk Kwon
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Publication number: 20160096445Abstract: A system and method for diagnosing a fuel cell stack are provided. The method includes determining, by a controller, a time at which diagnosing the fuel cell stack is required based on a plurality of factors and driving a motor adjusted to a first efficiency value for a predetermined first reference time period based on the diagnosis determination. In addition, the controller is configured to drive the motor adjusted to a second efficiency value when the first reference time period has elapsed. A state of the fuel cell stack is then diagnosed based on a voltage variance of the fuel cell stack between driving the motor adjusted to the first efficiency value and second efficiency value.Type: ApplicationFiled: February 6, 2015Publication date: April 7, 2016Inventors: Sung Jin Chung, Ja Hoo Koo, Joon Yong Lee, Soon Woo Kwon
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Publication number: 20160006059Abstract: A driving control system and method of a fuel cell system are provided. The driving control method includes determining, by a controller, when a fuel cell stack is in a water shortage, based on an oversupply of air to the fuel cell stack or a deterioration of the fuel cell stack. A diagnostic level is then assigned to the fuel cell system and at least one recovery driving mode that corresponds to the assigned diagnostic level is performed.Type: ApplicationFiled: December 1, 2014Publication date: January 7, 2016Inventors: Sang Uk Kwon, Soon Il Jeon, Ja Hoo Koo
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Publication number: 20150318565Abstract: A system and method of controlling a fuel cell vehicle are provided. The method includes adjusting power output from a plurality of fuel cell stacks based on entire output power required by a fuel cell vehicle and a state of charge (SOC) of a battery.Type: ApplicationFiled: November 25, 2014Publication date: November 5, 2015Inventors: Jung Hwan Ryu, Ja Hoo Koo
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Publication number: 20150224894Abstract: A method for diagnosing a fuel cell includes measuring a current and a voltage of a fuel cell stack while a fuel cell vehicle operates and sequentially storing the measured current and voltage. Whether or not the fuel cell vehicle operates at a constant current based on the stored current is determined. The measured current of the fuel cell stack is changed by driving any one of external current consumption apparatuses if it is determined based on the determination result that the fuel cell vehicle operates at the constant current.Type: ApplicationFiled: August 27, 2014Publication date: August 13, 2015Inventors: Ja Hoo KOO, Sang Uk KWON
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Publication number: 20150165928Abstract: A technique of diagnosing a fuel cell stack is provided. In particular, current and voltage of a fuel cell stack are measured during driving of a fuel cell vehicle and the current and voltage are sequentially stored. It is then determined based on the stored current whether the vehicle is being operated at constant current. Different factors are analyzed depending on whether the vehicle is being operated at constant current, and then it is determined whether the fuel cell stack is in a normal state. A moisture supply into the fuel cell stack is calculated if it is determined that the fuel cell stack is not in the normal state. Based on the calculated moisture supply, whether the fuel cell stack is in a dryout state is diagnosed.Type: ApplicationFiled: July 15, 2014Publication date: June 18, 2015Inventors: Ja Hoo Koo, Sung Jin Chung, Sang Uk Kwon
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Publication number: 20090140198Abstract: Disclosed herein is a method of preparing a metal oxide suspension, which is advantageous due to the prevention of hydration and agglomeration of the metal oxide and a simple preparation process. The method of preparing a metal oxide suspension according to this invention includes preparing metal oxide, mixing the metal oxide with a solvent and a surface treating agent to obtain a mixture, and wet milling the mixture such that the metal oxide of the mixture has a nanoscale particle size and the metal oxide is uniformly dispersed in the mixture.Type: ApplicationFiled: April 18, 2006Publication date: June 4, 2009Applicants: SAMSUNG CORNING CO., LTD., SAMSUNG CORNING PRECISION GLASS CO., LTD.Inventors: Yoon-Gyu Lee, Jin-Ho Lee, Myung-Geun Song, Sin-Ae Song, Ja-Hoo Koo