Patents by Inventor Leif Lindgren

Leif Lindgren 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: 20240089618
    Abstract: This disclosure provides systems, methods, and devices for vehicle driving assistance systems that support image processing for vehicular monitoring operations. In a first aspect, a method of image processing includes receiving image data from an image sensor comprising a red-clear-clear-green (RCCG) color filter, wherein the image data comprises a first channel corresponding to red, a second channel corresponding to clear, and a third channel corresponding to green, wherein the image data is in a logarithmic domain; and processing the image data by performing operations including linearization, tone mapping, demosaicing, and color mapping. Other aspects and features are also claimed and described.
    Type: Application
    Filed: September 8, 2022
    Publication date: March 14, 2024
    Inventors: Per Knutsson, Henrik Eliasson, Leif Lindgren
  • Patent number: 11727590
    Abstract: A vision system (10) for a motor vehicle includes a stereo imaging apparatus (11) adapted to capture images from a surrounding of the motor vehicle, a disparity calculation block (17) adapted to calculate a stereo disparity of left/right images captured by the stereo imaging apparatus (11), and a processing device (14) adapted to perform image processing of images captured by the imaging apparatus (11). The vision system is adapted to perform time sharing of the disparity calculation block (17) between the stereo disparity calculation and calculation of a one-dimensional optical flow of captured images in a horizontal direction only.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: August 15, 2023
    Assignee: Arriver Software AB
    Inventors: Leif Lindgren, Fredrik Medley
  • Patent number: 11431958
    Abstract: A vision system (10) for a motor vehicle with a stereo imaging apparatus (11) with imaging devices (12) adapted to capture images from a surrounding of the motor vehicle, and a processing device (14) adapted to process images captured by the imaging devices (12) and to detect objects, and track detected objects over several time frames, in the captured images. The processing device (14) is adapted to obtain an estimated value for the intrinsic yaw error of the imaging devices (12) by solving a set of equations, belonging to one particular detected object (30), using a non-linear equation solver method, where each equation corresponds to one time frame and relates a frame time, a disparity value of the particular detected object, an intrinsic yaw error and a kinematic variable of the vehicle.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 30, 2022
    Assignee: VEONEER SWEDEN AB
    Inventors: Leif Lindgren, Fredrik Medley, Per Knutsson
  • Publication number: 20200322588
    Abstract: A vision system (10) for a motor vehicle with a stereo imaging apparatus (11) with imaging devices (12) adapted to capture images from a surrounding of the motor vehicle, and a processing device (14) adapted to process images captured by the imaging devices (12) and to detect objects, and track detected objects over several time frames, in the captured images. The processing device (14) is adapted to obtain an estimated value for the intrinsic yaw error of the imaging devices (12) by solving a set of equations, belonging to one particular detected object (30), using a non-linear equation solver method, where each equation corresponds to one time frame and relates a frame time, a disparity value of the particular detected object, an intrinsic yaw error and a kinematic variable of the vehicle.
    Type: Application
    Filed: May 31, 2017
    Publication date: October 8, 2020
    Applicant: VEONEER SWEDEN AB
    Inventors: LEIF LINDGREN, FREDRIK MEDLEY, PER KNUTSSON
  • Patent number: 10706589
    Abstract: A motor vehicle vision system (10) includes a pair of imaging devices (12a, 12b) forming a stereo imaging apparatus (11) and a data processing apparatus (14) for rectification of images captured by the stereo imaging apparatus (11), matching of rectified images, and to detect an object in the surrounding of the motor vehicle. The data processing device (14) performs, for image elements (43) of a rectified image from one imaging device, a search for a best-matching image element (44?) in the corresponding rectified image from the other imaging device. The search yielding vertical shift information from which a vertical shift from the image element (43) to the best-matching image element (44?) is derivable. The data processing device (14) calculates a pitch angle error and/or a roll angle error of or between the imaging devices (12a, 12b) from the vertical shift information.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: July 7, 2020
    Assignee: VEONEER SWEDEN AB
    Inventor: Leif Lindgren
  • Patent number: 10706586
    Abstract: A motor vehicle vision system (10) including a stereo imaging system (11) and a data processing device (14) establishing an object detector (15) to detect an object and a tracker (16). The data processing device (14) calculates a size related value and a disparity related value for the object. An analysis section (20) performs an analysis on a group of at least five data points corresponding to different times, each data point includes a size related value and a disparity related value. The analysis uses predetermined regression function having at least one variable, and yields a best value for each variable corresponding to a best match of the regression function to the data points. The analysis section (20) calculates from a best value a systematic error in the disparity related values and/or in the size related values.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 7, 2020
    Assignee: VEONEER SWEDEN AB
    Inventor: Leif Lindgren
  • Publication number: 20190279385
    Abstract: A vision system (10) for a motor vehicle includes a stereo imaging apparatus (11) adapted to capture images from a surrounding of the motor vehicle, a disparity calculation block (17) adapted to calculate a stereo disparity of left/right images captured by the stereo imaging apparatus (11), and a processing device (14) adapted to perform image processing of images captured by the imaging apparatus (11). The vision system is adapted to perform time sharing of the disparity calculation block (17) between the stereo disparity calculation and calculation of a one-dimensional optical flow of captured images in a horizontal direction only.
    Type: Application
    Filed: September 20, 2017
    Publication date: September 12, 2019
    Applicant: VEONEER SWEDEN AB
    Inventors: LEIF LINDGREN, FREDRIK MEDLEY
  • Publication number: 20180357792
    Abstract: A motor vehicle vision system (10) includes a pair of imaging devices (12a, 12b) forming a stereo imaging apparatus (11) and a data processing apparatus (14) for rectification of images captured by the stereo imaging apparatus (11), matching of rectified images, and to detect an object in the surrounding of the motor vehicle. The data processing device (14) performs, for image elements (43) of a rectified image from one imaging device, a search for a best-matching image element (44?) in the corresponding rectified image from the other imaging device. The search yielding vertical shift information from which a vertical shift from the image element (43) to the best-matching image element (44?) is derivable. The data processing device (14) calculates a pitch angle error and/or a roll angle error of or between the imaging devices (12a, 12b) from the vertical shift information.
    Type: Application
    Filed: December 2, 2016
    Publication date: December 13, 2018
    Applicant: AUTOLIV DEVELOPMENT AB
    Inventor: LEIF LINDGREN
  • Publication number: 20180286076
    Abstract: A motor vehicle vision system (10) including a stereo imaging system (11) and a data processing device (14) establishing an object detector (15) to detect an object and a tracker (16). The data processing device (14) calculates a size related value and a disparity related value for the object. An analysis section (20) performs an analysis on a group of at least five data points corresponding to different times, each data point includes a size related value and a disparity related value. The analysis uses predetermined regression function having at least one variable, and yields a best value for each variable corresponding to a best match of the regression function to the data points. The analysis section (20) calculates from a best value a systematic error in the disparity related values and/or in the size related values.
    Type: Application
    Filed: August 25, 2016
    Publication date: October 4, 2018
    Applicant: AUTOLIV DEVELOPMENT AB
    Inventor: LEIF LINDGREN
  • Publication number: 20120038748
    Abstract: A vision system (10) for a motor vehicle includes at least one imaging device (12) adapted to detect images from a region surrounding the motor vehicle, and an electronic processing means (14) for processing image data provided by the imaging device (12). The imaging device (12) includes an image sensor (21). The vision system (10) is adapted to input window parameters to the image sensor (21) for cutting out and outputting a window image part (32) of the complete image area (30) of the image sensor (21).
    Type: Application
    Filed: May 5, 2010
    Publication date: February 16, 2012
    Applicant: AUTOLIV DEVELOPMENT AB
    Inventor: Leif Lindgren