Patents by Inventor Byoung-Kwang Kim

Byoung-Kwang Kim 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: 20210364639
    Abstract: A free space detection apparatus for a vehicle is provided to detect a free space based on a lidar sensor and recognize a driving environment. The apparatus includes a point data processor that removes noise of point data acquired from the LIDAR sensor and derives a half line with respect to an obstacle point from which noise has been removed based on coordinates of the obstacle point. A map processor generates a map for space classification, checks whether the obstacle point or the half line with respect to the obstacle point is present in a cell of the map and determines cell states of the map. A free space detector detects a free space based on the cell states of the map.
    Type: Application
    Filed: September 8, 2020
    Publication date: November 25, 2021
    Inventors: Ju Heon Baeg, Byoung Kwang Kim
  • Publication number: 20210312633
    Abstract: An apparatus for recognizing an object based on a lidar sensor and a method thereof can extract a valid contour point of an object from a point cloud generated by the lidar sensor and recognize a shape of the object based on a contour line composed of the extracted valid contour point of the object, such that it is possible to recognize the shape of an object located on a road with high accuracy, thereby improving the driving stability of an autonomous vehicle. The apparatus includes the lidar sensor that generates the point cloud around an autonomous vehicle, and a controller that extracts the valid contour point of the object from the point cloud and recognizes the shape of the object based on the contour line composed of the extracted valid contour point.
    Type: Application
    Filed: September 1, 2020
    Publication date: October 7, 2021
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Mi Rim Noh, Ju Heon Baeg, Byoung Kwang Kim
  • Patent number: 11024176
    Abstract: A collision avoidance control system and method are provided. The system includes a GPS receiver that obtains location information of a vehicle, a navigation system having map information, and a sensor unit that senses a target vehicle located near a roundabout. The sensor obtains traveling information of the target vehicle and forward view image information of the vehicle. A controller then calculates an estimated collision point based on the map information, the location information of the vehicle and the traveling information of the target vehicle to determine a risk of collision based on an absolute value of a difference between an arrival time of the vehicle to the estimated collision point and an arrival time of the target vehicle to the estimated collision point. The speed of the vehicle is then adjusted in response to the determined risk of collision.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 1, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chang Young Jung, Byoung Kwang Kim, Su Rim Kwon
  • Patent number: 10984265
    Abstract: A method of estimating a front obstacle detection distance includes detecting an obstacle from a front image of a vehicle, extracting coordinates of a lower end portion of a detection box of the detected obstacle, calculating a projected line on real world coordinates based on the extracted coordinates of the lower end portion, searching for a point or a line through which the projected line passes on a detailed map, and calculating a distance to the point or the line through which the projected line passes on the detailed map from a position of the vehicle.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: April 20, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Byoung Kwang Kim, Jae Hwan Jang, Jin Hak Kim
  • Publication number: 20200193180
    Abstract: A method of estimating a front obstacle detection distance includes detecting an obstacle from a front image of a vehicle, extracting coordinates of a lower end portion of a detection box of the detected obstacle, calculating a projected line on real world coordinates based on the extracted coordinates of the lower end portion, searching for a point or a line through which the projected line passes on a detailed map, and calculating a distance to the point or the line through which the projected line passes on the detailed map from a position of the vehicle.
    Type: Application
    Filed: May 8, 2019
    Publication date: June 18, 2020
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Byoung Kwang Kim, Jae Hwan Jang, Jin Hak Kim
  • Publication number: 20200074863
    Abstract: A collision avoidance control system and method are provided. The system includes a GPS receiver that obtains location information of a vehicle, a navigation system having map information, and a sensor unit that senses a target vehicle located near a roundabout. The sensor obtains traveling information of the target vehicle and forward view image information of the vehicle. A controller then calculates an estimated collision point based on the map information, the location information of the vehicle and the traveling information of the target vehicle to determine a risk of collision based on an absolute value of a difference between an arrival time of the vehicle to the estimated collision point and an arrival time of the target vehicle to the estimated collision point. The speed of the vehicle is then adjusted in response to the determined risk of collision.
    Type: Application
    Filed: November 29, 2018
    Publication date: March 5, 2020
    Inventors: Chang Young Jung, Byoung Kwang Kim, Su Rim Kwon
  • Patent number: 9489588
    Abstract: A matting method and apparatus for extracting a foreground object are disclosed. The matting method includes extracting one or more pixels from an input image and a trimap; calculating a first processing cost by extracting one or more nonlocal neighboring pixels; calculating a second processing cost by extracting one or more local neighboring pixels; and performing matting on the input image by estimating an opacity value for each of the extracted pixels based on the first and second processing costs. Accordingly, it is possible to perform high-quality image matting, and thus increase a performance in extracting a to foreground object from the input image, so that the matting method and apparatus can be applied to multiple-purpose image editing software.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: November 8, 2016
    Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Woo Jin Song, Meiguang Jin, Byoung Kwang Kim
  • Publication number: 20160110876
    Abstract: A matting method and apparatus for extracting a foreground object are disclosed. The matting method includes extracting one or more pixels from an input image and a trimap; calculating a first processing cost by extracting one or more nonlocal neighboring pixels; calculating a second processing cost by extracting one or more local neighboring pixels; and performing matting on the input image by estimating an opacity value for each of the extracted pixels based on the first and second processing costs. Accordingly, it is possible to perform high-quality image matting, and thus increase a performance in extracting a to foreground object from the input image, so that the matting method and apparatus can be applied to multiple-purpose image editing software.
    Type: Application
    Filed: April 30, 2015
    Publication date: April 21, 2016
    Inventors: Woo Jin SONG, Meiguang JIN, Byoung Kwang KIM
  • Patent number: 8750641
    Abstract: Provided are an apparatus and method for correcting distortion of an image. The method includes finding center point vectors including lens distortion center information about an image and dividing the image into at least two blocks on the basis of the center point vectors, and determining representative directions of the at least two divided blocks and removing outlier vectors not indicating the representative directions from the blocks to estimate a lens distortion center. Accordingly, accurate image correction is enabled by estimating distortion centers of images generated by devices equipped with any lens. Also, image content improving lens distortion correction performance is differentiated from image content degrading the same by picking out image content improving lens distortion center estimation performance, so that a superior image correction effect to other image correction techniques can be obtained.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: June 10, 2014
    Assignee: Postech Academy—Industry Foundation
    Inventors: Moon Kyu Song, Hyun Woong Cho, Byoung Kwang Kim, Woo Jin Song
  • Patent number: 8675985
    Abstract: Provided are an apparatus and method for processing an image. The apparatus includes a detector configured to form one group with pieces of pixel information on an edge of a received image, detect line segments, and generate a plurality of curves using the detected line segments, an optimizer configured to apply a weight to a cost function based on the plurality of generated curves according to distance from the center of the image, define a curve having a shorter length than a threshold value as an outlier and a curve having a greater length than the threshold value as an inlier, remove the outlier, and estimate a distortion level parameter, and a corrector configured to correct a position of a pixel with a correction value using the distortion level parameter. Accordingly, it is possible to correct lens distortion of even an image that has not been directly photographed, and to correct images generated by devices equipped with any lens rather than a specific camera or photographing apparatus.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 18, 2014
    Assignee: Postech Academy—Industry Foundation
    Inventors: Woo-Jin Song, Hyun Woong Cho, Moon Kyu Song, Byoung-kwang Kim, Soon-Wook Chung
  • Patent number: 8358835
    Abstract: A method for detecting and correcting a chromatic aberration, and an apparatus and method for processing an image using the same are provided. A chromatic aberration is detected by dividing an edge portion of the image into static areas where a color varies below a reference value and a dynamic area where a color varies above the reference value, calculating a intensity difference value between at least one reference color and a comparative color for each of the static areas and the dynamic area, and determining at least one pixel having a intensity difference value exceeding a range of intensity difference values in the static areas among pixels in the dynamic area, as a chromatic aberration region. The chromatic aberration is corrected by correcting the intensity difference value for the pixels in the chromatic aberration region using a correction value in the intensity difference value range in the static area.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: January 22, 2013
    Assignee: Postech Academy—Industry Foundation
    Inventors: Woo-Jin Song, Soon-Wook Chung, Byoung-Kwang Kim
  • Patent number: 8345967
    Abstract: A method and apparatus for processing an image to create a grayscale image are provided. The method includes converting, in a color image consisting of a plurality of pixels, a pixel value of each pixel in a RGB color space into a pixel value in a new color space through color space conversion, extracting color information using the pixel value in the new color space, calculating a luminance change amount of each pixel using the extracted color information, calculating a luminance value for the grayscale image by combining an original luminance value of each pixel and the luminance change amount, and creating the grayscale image according to the calculated luminance value. In converting color image into grayscale image and representing the grayscale image, the luminance change amount is set according to a property of each color perceived by humans and added to original luminance value, thereby explicitly discriminating among objects.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: January 1, 2013
    Assignee: Postech Academy—Industry Foundation
    Inventors: Tae-Hee Lee, Byoung-Kwang Kim, Woo-Jin Song
  • Publication number: 20120170865
    Abstract: Provided are an apparatus and method for correcting distortion of an image. The method includes finding center point vectors including lens distortion center information about an image and dividing the image into at least two blocks on the basis of the center point vectors, and determining representative directions of the at least two divided blocks and removing outlier vectors not indicating the representative directions from the blocks to estimate a lens distortion center. Accordingly, accurate image correction is enabled by estimating distortion centers of images generated by devices equipped with any lens. Also, image content improving lens distortion correction performance is differentiated from image content degrading the same by picking out image content improving lens distortion center estimation performance, so that a superior image correction effect to other image correction techniques can be obtained.
    Type: Application
    Filed: November 17, 2011
    Publication date: July 5, 2012
    Applicant: POSTECH ACADEMY - INDUSTRY FOUNDATION
    Inventors: Moon Kyu Song, Hyun Woong Cho, Byoung Kwang Kim, Woo Jin Song
  • Publication number: 20120170853
    Abstract: Provided are an apparatus and method for processing an image. The apparatus includes a detector configured to form one group with pieces of pixel information on an edge of a received image, detect line segments, and generate a plurality of curves using the detected line segments, an optimizer configured to apply a weight to a cost function based on the plurality of generated curves according to distance from the center of the image, define a curve having a shorter length than a threshold value as an outlier and a curve having a greater length than the threshold value as an inlier, remove the outlier, and estimate a distortion level parameter, and a corrector configured to correct a position of a pixel with a correction value using the distortion level parameter. Accordingly, it is possible to correct lens distortion of even an image that has not been directly photographed, and to correct images generated by devices equipped with any lens rather than a specific camera or photographing apparatus.
    Type: Application
    Filed: June 17, 2011
    Publication date: July 5, 2012
    Applicant: POSTECH ACADEMY - INDUSTRY FOUNDATION
    Inventors: Woo Jin Song, Hyun Woong Cho, Moon Kyu Song, Byoung Kwang Kim
  • Publication number: 20100208985
    Abstract: A method and apparatus for processing an image to create a grayscale image are provided. The method includes converting, in a color image consisting of a plurality of pixels, a pixel value of each pixel in a RGB color space into a pixel value in a new color space through color space conversion, extracting color information using the pixel value in the new color space, calculating a luminance change amount of each pixel using the extracted color information, calculating a luminance value for the grayscale image by combining an original luminance value of each pixel and the luminance change amount, and creating the grayscale image according to the calculated luminance value. In converting color image into grayscale image and representing the grayscale image, the luminance change amount is set according to a property of each color perceived by humans and added to original luminance value, thereby explicitly discriminating among objects.
    Type: Application
    Filed: November 10, 2009
    Publication date: August 19, 2010
    Applicant: Postech Academy - Industry Foundation
    Inventors: Tae-Hee Lee, Byoung-Kwang Kim, Woo-Jin Song
  • Publication number: 20100166305
    Abstract: A method for detecting and correcting a chromatic aberration, and an apparatus and method for processing an image using the same are provided. A chromatic aberration is detected by dividing an edge portion of the image into static areas where a color varies below a reference value and a dynamic area where a color varies above the reference value, calculating a intensity difference value between at least one reference color and a comparative color for each of the static areas and the dynamic area, and determining at least one pixel having a intensity difference value exceeding a range of intensity difference values in the static areas among pixels in the dynamic area, as a chromatic aberration region. The chromatic aberration is corrected by correcting the intensity difference value for the pixels in the chromatic aberration region using a correction value in the intensity difference value range in the static area.
    Type: Application
    Filed: November 10, 2009
    Publication date: July 1, 2010
    Applicant: Postech Academy - Industry Foundation
    Inventors: Woo-Jin Song, Soon-Wook Chung, Byoung-Kwang Kim